Blue Coat Systems, Inc.
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5
Security Target
Document Version: 1.3
Prepared for: Prepared by:
Blue Coat Systems, Inc. Corsec Security, Inc.
420 N. Mary Avenue
Sunnyvale, CA 94085
United States of America
13135 Lee Jackson Memorial Hwy., Suite 220
Fairfax, VA 22033
United States of America
Phone: +1 866 30-BCOAT (22628) Phone: +1 703 267 6050
Email: usinfo@bluecoat.com Email: info@corsec.com
http://www.bluecoat.com http://www.corsec.com
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 2 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Table of Contents
1 INTRODUCTION ...................................................................................................................4
1.1 PURPOSE ....................................................................................................................................................... 4
1.2 SECURITY TARGET AND TOE REFERENCES ................................................................................................ 5
1.3 PRODUCT OVERVIEW .................................................................................................................................. 6
1.3.1 ProxySG Feature Areas.........................................................................................................................................6
1.4 TOE OVERVIEW........................................................................................................................................... 8
1.4.1 TOE Environment...................................................................................................................................................9
1.5 TOE DESCRIPTION....................................................................................................................................10
1.5.1 Physical Scope.......................................................................................................................................................10
1.5.2 Logical Scope ........................................................................................................................................................12
1.5.3 Product Physical/Logical Features and Functionality not included in the TOE.................................14
2 CONFORMANCE CLAIMS ..................................................................................................15
3 SECURITY PROBLEM ..........................................................................................................16
3.1 THREATS TO SECURITY..............................................................................................................................16
3.2 ORGANIZATIONAL SECURITY POLICIES ....................................................................................................17
3.3 ASSUMPTIONS.............................................................................................................................................17
4 SECURITY OBJECTIVES......................................................................................................18
4.1 SECURITY OBJECTIVES FOR THE TOE .......................................................................................................18
4.2 SECURITY OBJECTIVES FOR THE OPERATIONAL ENVIRONMENT..............................................................18
4.2.1 IT Security Objectives.........................................................................................................................................18
4.2.2 Non-IT Security Objectives ...............................................................................................................................19
5 EXTENDED COMPONENTS ..............................................................................................20
5.1 EXTENDED TOE SECURITY FUNCTIONAL COMPONENTS.......................................................................20
5.2 EXTENDED TOE SECURITY ASSURANCE COMPONENTS.........................................................................36
6 SECURITY REQUIREMENTS ..............................................................................................37
6.1 CONVENTIONS ..........................................................................................................................................37
6.2 SECURITY FUNCTIONAL REQUIREMENTS ..................................................................................................37
6.2.1 Class FAU: Security Audit..................................................................................................................................39
6.2.2 Class FCS: Cryptographic Support .................................................................................................................42
6.2.3 Class FDP: User Data Protection....................................................................................................................45
6.2.4 Class FIA: Identification and Authentication................................................................................................46
6.2.5 Class FMT: Security Management.................................................................................................................47
6.2.6 Class FPT: Protection of the TSF.....................................................................................................................48
6.2.7 Class FTA: TOE Access ......................................................................................................................................49
6.2.8 Class FTP: Trusted Path/Channels .................................................................................................................50
6.3 SECURITY ASSURANCE REQUIREMENTS.....................................................................................................51
7 TOE SUMMARY SPECIFICATION .....................................................................................52
7.1 TOE SECURITY FUNCTIONS......................................................................................................................52
7.1.1 Security Audit........................................................................................................................................................53
7.1.2 Cryptographic Support.......................................................................................................................................54
7.1.3 User Data Protection..........................................................................................................................................56
7.1.4 Identification and Authentication....................................................................................................................57
7.1.5 Security Management........................................................................................................................................58
7.1.6 Protection of the TSF..........................................................................................................................................59
7.1.7 TOE Access............................................................................................................................................................62
7.1.8 Trusted Path/Channels ......................................................................................................................................62
8 RATIONALE..........................................................................................................................64
8.1 CONFORMANCE CLAIMS RATIONALE.......................................................................................................64
8.1.1 Variance Between the PP and this ST ..........................................................................................................64
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 3 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
8.1.2 Security Assurance Requirements Rationale...............................................................................................64
8.1.3 Dependency Rationale.......................................................................................................................................64
9 ACRONYMS AND TERMS...................................................................................................67
9.1 TERMINOLOGY...........................................................................................................................................67
9.2 ACRONYMS ................................................................................................................................................68
Table of Figures
FIGURE 1 EVALUATED CONFIGURATION OF THE TOE.................................................................................................9
FIGURE 2 PHYSICAL TOE BOUNDARY IN THE EVALUATED CONFIGURATION..........................................................11
FIGURE 3 EXTENDED: SECURITY AUDIT EVENT STORAGE FAMILY DECOMPOSITION..................................................21
FIGURE 4 EXTENDED: CRYPTOGRAPHIC KEY MANAGEMENT FAMILY DECOMPOSITION ............................................22
FIGURE 5 EXTENDED: CRYPTOGRAPHIC OPERATION (RANDOM BIT GENERATION) FAMILY DECOMPOSITION .....23
FIGURE 6 EXPLICIT: TLS FAMILY DECOMPOSITION ......................................................................................................24
FIGURE 7 EXPLICIT: SSH FAMILY DECOMPOSITION......................................................................................................26
FIGURE 8 EXTENDED: HTTPS FAMILY DECOMPOSITION ............................................................................................27
FIGURE 9 PASSWORD MANAGEMENT FAMILY DECOMPOSITION.................................................................................28
FIGURE 10 USER AUTHENTICATION FAMILY DECOMPOSITION ...................................................................................29
FIGURE 11 USER IDENTIFICATION AND AUTHENTICATION FAMILY DECOMPOSITION..............................................30
FIGURE 12 EXTENDED: PROTECTION OF ADMINISTRATOR PASSWORDS FAMILY DECOMPOSITION.........................31
FIGURE 13 EXTENDED: PROTECTION OF TSF DATA (FOR READING OF ALL SYMMETRIC KEYS)...............................32
FIGURE 14 EXTENDED: TSF TESTING FAMILY DECOMPOSITION .................................................................................33
FIGURE 15 EXTENDED: TRUSTED UPDATE FAMILY DECOMPOSITION .........................................................................34
FIGURE 16 TSF-INITIATED SESSION LOCKING FAMILY DECOMPOSITION....................................................................35
List of Tables
TABLE 1 ST AND TOE REFERENCES ..............................................................................................................................5
TABLE 3 CC AND PP CONFORMANCE........................................................................................................................15
TABLE 4 THREATS .........................................................................................................................................................16
TABLE 5 ORGANIZATIONAL SECURITY POLICIES.........................................................................................................17
TABLE 6 ASSUMPTIONS .................................................................................................................................................17
TABLE 7 SECURITY OBJECTIVES FOR THE TOE............................................................................................................18
TABLE 8 IT SECURITY OBJECTIVES................................................................................................................................19
TABLE 9 NON-IT SECURITY OBJECTIVES .....................................................................................................................19
TABLE 10 EXTENDED TOE SECURITY FUNCTIONAL REQUIREMENTS........................................................................20
TABLE 11 TOE SECURITY FUNCTIONAL REQUIREMENTS...........................................................................................37
TABLE 12 AUDITABLE EVENTS......................................................................................................................................39
TABLE 13 NDPP ASSURANCE REQUIREMENTS............................................................................................................51
TABLE 14 MAPPING OF TOE SECURITY FUNCTIONS TO SECURITY FUNCTIONAL REQUIREMENTS .........................52
TABLE 15 SELF-TEST DESCRIPTIONS.............................................................................................................................60
TABLE 16 FUNCTIONAL REQUIREMENTS DEPENDENCIES ...........................................................................................64
TABLE 17 TERMS ...........................................................................................................................................................67
TABLE 18 ACRONYMS...................................................................................................................................................68
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 4 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
1 Introduction
This section identifies the Security Target (ST), Target of Evaluation (TOE), and the organization of the
ST. The TOE is the Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS1
v6.5, and will
hereafter be referred to as the TOE throughout this document. The TOE is a proprietary operating system
(OS) developed specifically for use on a hardware appliance that serves as an Internet proxy and Wide Area
Network (WAN) optimizer. The purpose of the appliance is to provide a layer of security between an
Internal and External Network, typically an office network and the Internet, and to provide acceleration and
compression of transmitted data.
1.1 Purpose
This ST is divided into nine sections, as follows:
 Introduction (Section 1) – Provides a brief summary of the ST contents and describes the
organization of other sections within this document. It also provides an overview of the TOE
security functions and describes the physical and logical scope for the TOE, as well as the ST and
TOE references.
 Conformance Claims (Section 2) – Provides the identification of any Common Criteria (CC),
Protection Profile, and Evaluation Assurance Level (EAL) package claims. It also identifies
whether the ST contains extended security requirements.
 Security Problem (Section 3) – Describes the threats, organizational security policies, and
assumptions that pertain to the TOE and its environment.
 Security Objectives (Section 4) – Identifies the security objectives that are satisfied by the TOE
and its environment.
 Extended Components (Section 5) – Identifies new components (extended Security Functional
Requirements (SFRs) and extended Security Assurance Requirements (SARs)) that are not
included in CC Part 2 or CC Part 3.
 Security Requirements (Section 6) – Presents the SFRs and SARs met by the TOE.
 TOE Summary Specification (Section 7) – Describes the security functions provided by the TOE
that satisfy the security functional requirements and objectives.
 Rationale (Section 8) - Presents the rationale for the SFR dependencies as to their consistency,
completeness, and suitability.
 Acronyms and Terms (Section 9) – Defines the acronyms and terminology used within this ST.
1
SGOS – Secure Gateway Operating System
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 5 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
1.2 Security Target and TOE References
Table 1 below shows the ST and TOE references.
Table 1 ST and TOE References
ST Title Blue Coat Systems, Inc. Blue Coat ProxySG SG600, SG900, and SG9000 running
SGOS v6.5 Security Target
ST Version Version 1.3
ST Author Corsec Security, Inc.
ST Publication Date 03/07/2013
TOE Reference Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 build:
143753
CAVP Validated
Algorithm
Certificates
AES Cert. #2925
RSA Cert. #1534
SHA Cert. #2461
DRBG Cert. #539
HMAC Cert. #1852
Cavium AES Cert #105, #1265
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 6 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
1.3 Product Overview
The Product Overview provides a high-level description of the Blue Coat Blue Coat ProxySG SG600,
SG900, and SG9000 running SGOS v6.5 that is the subject of the evaluation. The following section, TOE
Overview, provides the introduction to the parts of the overall product offering that are specifically being
evaluated.
The Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 appliances (ProxySG) is a
proprietary OS and hardware appliance that together serve as an Internet proxy. The purpose of the
appliance is to provide a layer of security between an Internal and External Network (typically an office
network and the Internet), and to provide WAN optimization for traffic passing between networks. The
ProxySG SG600, SG900, and SG9000 appliances run software that differs only in platform-specific
configuration data, which describes the intended hardware platform to the OS. Differences between
product models allow for different capacity, performance, and scalability options.
The security provided by the ProxySG can be used to control, protect, and monitor the Internal Network’s
use of controlled protocols on the External Network. The ProxySG appliances offer a choice of two
“editions” via licensing: MACH5 and Proxy. The MACH5 edition appliances offer a subset of the Proxy’s
services and have some Proxy features disabled (as indicated below).
The controlled protocols implemented are:
 Hypertext Transfer Protocol (HTTP)
 Secure Hypertext Transfer Protocol (HTTPS)
 File Transfer Protocol (FTP)
 SOCKS7
(not included with MACH5 edition)
 Instant Messaging (AOL8
, MSN9
/Windows LIVE Messenger, and Yahoo!) (not included with
MACH5 edition)
 Common Internet File System (CIFS)
 Real-Time Streaming Protocol (RTSP)
 Microsoft Media Streaming (MMS)
 Messaging Application Programming Interface (MAPI)
 Transmission Control Protocol (TCP) tunnelling protocols (e.g., Secure Shell (SSH), IMAP10
,
POP311
, SMTP12
)
 Telnet
 Domain Name System (DNS)
Access control is achieved by enforcing configurable policies on controlled protocol traffic to and from the
Internal Network users. The policy may include authentication, authorization, content filtering, and
auditing. In addition, the ProxySG provides optimization of data transfer between ProxySG nodes on a
WAN using its Application Delivery Network (ADN) technology. Optimization is achieved by enforcing a
configurable policy on traffic traversing the WAN.
1.3.1 ProxySG Feature Areas
The following paragraphs depict a brief description of the ProxySG feature areas.
7
SOCKS – SOCKet Secure
8
AOL – America Online
9
MSN – The Microsoft Network
10
IMAP – Internet Message Access Protocol
11
POP3 – Post Office Protocol version 3
12
SMTP – Simple Mail Transfer Protocol
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 7 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
1.3.1.1 Administrative Access
Administrative access to the ProxySG is provided by the serial port and Ethernet port. Administrators
access the serial port using a terminal emulator over a direct serial connection to the appliance. The serial
port controls access to the Setup Console (used for initial configuration only) and the Command Line
Interface (CLI), which is used for normal administrative operations. Administrators can also access the
CLI using SSH over an Ethernet connection. Administrators access the Management Console (a Web
Graphical User Interface) using HTTPS over an Ethernet connection for normal administrative operations.
1.3.1.2 Security Functional Policies
After initial configuration, the ProxySG is considered operational and behaves as a proxy that either denies
or allows all proxied transactions through the ProxySG. During initial configuration, the administrator
must choose which policy (allow or deny) is the default. To further manage controlled protocol traffic
flow, an authorised administrator defines policy rules that provide a higher level of granularity than the
default accept-all or deny-all policy.
Policy rules can require authentication credentials be entered by the End User that made request. End
Users are those users that make requests from within the protected Internal Network out to the External
Network. End Users do not have any access to management functionality. To control access with
authentication, there must be an existing list of user accounts to use for authentication. The policy rules
that define what protocols will be proxied, optimized, or require authentication are expressed using Content
Policy Language (CPL).
1.3.1.3 Explicit and Transparent Network Environments
In order to act as a proxy and manage controlled protocol traffic between the Internal and External
Network, all of the targeted traffic must flow through the appliance. Arranging for controlled protocol
traffic to flow through the appliance requires configuration of the organization’s network environment.
There are two kinds of network deployments: explicit and transparent. In an explicit deployment, the
users’ client software (e.g. a web browser) is configured to access the External Network via the proxy. The
client software presents the traffic to the Internal Network port of the proxy for service. In a transparent
deployment, the network and proxy are configured so that the proxy can intercept controlled protocol
traffic intended for the External Network. The users’ software is not changed and the user may be unaware
that controlled protocol traffic is passing through the proxy.
1.3.1.4 Reverse Proxy
The ProxySG can function as a reverse proxy. When configured, the ProxySG can cache and deliver
pictures and other non-variable content rapidly, offloading those efforts from the OCS. This frees the OCS
to perform application-based services.
1.3.1.5 WAN Optimization
The ProxySG provides acceleration of WAN traffic using bandwidth management, data compression,
protocol optimization, and object caching15
. The ProxySG’s ADN feature, which requires two16
ProxySGs
located at each end of the WAN or LAN link, utilizes additional byte caching17
, object caching, and
compression techniques to provide enhanced optimization for traffic. This decreases bandwidth usage and
optimizes response time.
15
Object caching – enables clients to retrieve previously received data from a cache, rather than across the WAN.
16
Only a single ProxySG was tested in the CC Evaluated Configuration.
17
Byte caching – technique in which the TOE replaces large blocks of repeated data with small tokens representing that
data prior to transmission.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 8 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
1.4 TOE Overview
The TOE Overview summarizes the usage and major security features of the TOE. The TOE Overview
provides a context for the TOE evaluation by identifying the TOE type, describing the product, and
defining the specific evaluated configuration.
The TOE is the Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 and is a hardware
and software TOE. The purpose of the TOE is to provide a layer of security between an Internal and
External Network (typically an office network and the Internet), and to provide WAN optimization for
traffic passing between networks.
The TOE appliances run software that differs only in platform-specific configuration data, which describes
the intended hardware platform to the OS. Differences between TOE models allow for different capacity,
performance, and scalability options, as depicted below in Table 2.
Table 2 Evaluated Platforms Comparison
SG600 SG900 SG9000
Concurrent
Users
450-Unlimited 3500-Unlimited Unlimited
Storage 1x250GB – 2x250GB SATA 2x500 GB – 4x2TB SAS 8x500GB – 15x1TB SAS
Memory 4GB 6-32GB 8-64GB
Throughput  2x1000 Base-T card
 1x1000 Base-T card
2x 1000 Base-T (bridged
pair)
4x1000 Base-T (1x
management, 1x auxiliary, 1
bridged pair)
Enclosure 1U18
x 19” 1U x 19” 4U x 19”
The TOE can be used to control, protect, and monitor the Internal Network’s use of controlled protocols on
the External Network. The TOE appliances offer a choice of two “editions” via licensing: MACH5 and
Proxy. The MACH5 edition appliances offer a subset of the Proxy’s services and have some Proxy
features disabled (as indicated below).
The controlled protocols implemented in the evaluated configuration are:
 Hypertext Transfer Protocol (HTTP)
 Secure Hypertext Transfer Protocol (HTTPS)
 File Transfer Protocol (FTP)
 SOCKS (not included with MACH5 edition)
 Instant Messaging (AOL, MSN/Windows LIVE Messenger, and Yahoo!) (not included with
MACH5 edition)
 Common Internet File System (CIFS)
 Real-Time Streaming Protocol (RTSP)
 Microsoft Media Streaming (MMS)
 Messaging Application Programming Interface (MAPI)
 Transmission Control Protocol (TCP) tunnelling protocols (e.g., Secure Shell (SSH), IMAP,
POP3, SMTP)
 Telnet
 Domain Name System (DNS)
18
U – Unit
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 9 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Access control is achieved by enforcing configurable policies on controlled protocol traffic to and from the
Internal Network users. The policy may include authentication, authorization, content filtering, and
auditing. In addition, the ProxySG provides optimization of data transfer between ProxySG nodes on a
WAN using its ADN technology. Optimization is achieved by enforcing a configurable policy on traffic
traversing the WAN.
The TOE provides Administrative access via the serial port and Ethernet port. Administrators access the
serial port using a terminal emulator over a direct serial connection to the appliance. The serial port
controls access to the Setup Console (used for initial configuration only) and the Command Line Interface
(CLI), which is used for normal administrative operations. Administrators can also access the CLI using
SSH over an Ethernet connection. Administrators access the Management Console using HTTPS over an
Ethernet connection for normal administrative operations.
The two primary security capabilities of the TOE are secure management of the TOE and restricting
controlled protocol traffic between the Internal and External Networks. The tangible assets and
management functions are protected by restricting access to administrators. Only administrators can log
into the ProxySG’s management interfaces, access the ProxySG’s configuration, and configure policies.
Figure 1 shows the details of the evaluated configuration of the TOE.
Firewall ProxySG
LDAP Server
`
Management
Workstation
Audit Server
Windows AD Domain
Controller with BCAAA
Figure 1 Evaluated Configuration of the TOE
1.4.1 TOE Environment
The TOE needs the following environmental components in order to function properly:
 cables, connectors, and switching and routing devices that allow all of the TOE and environmental
components to communicate with each other
 an audit server that will contain a script to continuously pull audit logs off the TOE
 a management workstation with a standards-compliant client program to access the Management
Console over HTTPS and the CLI using SSH
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 10 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
 a server installed with BCAAA19
or an LDAP server for remote authentication.
 a firewall between the TOE and the External Network
The TOE is intended to be deployed in a secure data center that protects physical access to the TOE. The
Audit Server, Management Workstation, and LDAP Server are all intended to be deployed in the same
secure data center as the TOE. The TOE is intended to be interconnected by a back-end private network
that does not connect directly to external hosts
1.5 TOE Description
This section primarily addresses the physical and logical components of the TOE included in the
evaluation.
1.5.1 Physical Scope
Figure 2 illustrates the physical scope and the physical boundary of the overall solution and ties together all
of the constituents of the TOE Environment. The Blue Coat ProxySG SG600, SG900, and SG9000 running
SGOS v6.5 appliances (ProxySG) is a proprietary OS and hardware appliance that together serve as an
Internet proxy. The purpose of the appliance is to provide a layer of security between an Internal and
External Network (typically an office network and the Internet), and to provide WAN optimization for
traffic passing between networks.
The ProxySG is one of several appliances manufactured by Blue Coat Systems. The TOE appliances
include the SG600, SG900, and SG9000 lines of products. All appliances run TOE software, SGOS v6.5,
which differs only in platform specific configuration data, which describes the intended hardware platform
to the OS.
The TOE boundary comprises the Blue Coat SG600, SG900, and SG9000 appliances and the SGOS
v6.5.1.5 build 143753 software installed on the appliances.
19
BCAAA – Blue Coat Systems Authentication and Authorization Agent – provides remote authentication over a
secure channel
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 11 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Legend:
TOE Boundary
Firewall ProxySG
LDAP Server
`
Management
Workstation
Audit Server
Windows AD Domain
Controller with BCAAA
Figure 2 Physical TOE Boundary in the Evaluated Configuration
1.5.1.1 TOE Software and Hardware
The TOE is a software and hardware TOE. For the evaluated configuration, the TOE software must be
installed and run on one of the following Blue Coat appliance configurations:
 ProxySG SG600-10, SG600-20, SG600-35 with a Cavium CN501 Hardware Accelerator Card
(HAC)
 ProxySG SG900-10, SG900-20, 900-30, SG900-45, SG900-55 with a Cavium CN1610 HAC
 ProxySG SG9000-20, SG9000-30, SG9000-40 with a Cavium CN1620 PCI-e20
HAC
For all the above appliance models, the appliance type can be either MACH5 edition (For example,
ProxySG SG600-20-M5) for WAN optimization, or Proxy edition (For example, ProxySG SG600-20-PR)
for both Proxy and WAN 21
optimization features. Excluding the components listed in section 1.4.1, there
are no additional hardware or environmental components are required for the TOE to function in the
evaluated configuration.
20
PCI-e – Peripheral Controller Interconnect-Express
21
Proxy and WAN optimization features – Per the scope and SFR claims of the ND PP, only the administrative
functionality was tested. No testing was performed on the Proxy or WAN Optimization features.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 12 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
1.5.1.2 Guidance Documentation
The following guides are required reading and part of the TOE:
 Blue Coat Systems SGOS Administration Guide, Version SGOS 6.5.x, 231-03113, SGOS 6.5.x,
06/2014
 Blue Coat Systems Common Access Card (CAC) Solutions Guide, SGOS 6.1.2 and later, 231-
03155, SGOS 6.5.x, 06/2014
 Blue Coat Notice and Consent Banner Configuration Webguide, SGOS 6.5.x, Webguide version
01-2014.03.14 (https://bto.bluecoat.com/sgos/NCB/Notice_Consent_Banner.htm)
 Blue Coat Systems SCPS22
Deployment Guide SGOS Version 6.3.x and later, 231-03156, SGOS
6.3, 08/2013
 Blue Coat Systems ProxySG Appliance Command Line Interface Reference, version SGOS 6.5.x,
231-03035, SGOS 6.5.x, 04/2014
 Blue Coat Systems ProxySG Appliance Content Policy Language Reference, version SGOS 6.5.x,
231-03019, SGOS 6.5.3, 07/2014
 Blue Coat SGOS Upgrade/Downgrade Guide, 04/2014
 Blue Coat Systems ProxySG Appliance Visual Policy Manager Reference and Advanced Policy
Tasks, SGOS Version 6.5.x, 231-03015, SGOS 6.5.x, 01/2014
 ProxySG Quick Start Guide SG600 Series, 231-03048, Rev A.0
 ProxySG Quick Start Guide: SG900 Series, 231-03109, Rev C.0
 ProxySG Quick Start Guide: SG9000 Series, 231-03159, Rev A.2
 Blue Coat ProxySG 600 Series FIPS23
Compliance Guide: Tamper Evident Panel and Label
Installation, 231-03160, C.0
 Blue Coat ProxySG 900 Series FIPS Compliance Guide: Tamper Evident Panel and Label
Installation, 231-03161, B.0
 Blue Coat ProxySG 9000 Series FIPS Compliant Tamper Evident Faceplate and Label Installation
Guide, 231-03063, B.0
 Blue Coat ProxySG Maintenance and Upgrade Guide, ProxySG 600 Series, 231-03051, A.2
 Blue Coat ProxySG Maintenance and Upgrade Guide, ProxySG 900 Series, 231-03166, B.1
 Blue Coat 9000 Series Maintenance & Upgrade Guide, 231-03038, E.4
 Blue Coat Systems, Inc. Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5
Guidance Supplement v1.0
1.5.2 Logical Scope
The logical boundary of the TOE will be broken down into the following security classes which are further
described in sections 6 and 7 of this ST. The logical scope also provides the description of the security
features of the TOE. The SFRs implemented by the TOE are usefully grouped under the following
Security Function Classes.
1.5.2.1 Security Audit
The TOE generates audit records for security relevant actions of the authorized administrators accessing the
TOE via the CLI and Management Console; these records are stored in the System Event Log. The TOE
records the identity of the administrator responsible for the log event, where applicable. Logs can be
retrieved by an external audit server via a secure channel (HTTPS provided by the TOE’s cryptographic
algorithms).
1.5.2.2 Cryptographic Support
The Cryptographic Support of the TSF function provides cryptographic functions to secure web browser
sessions (Management Console) and terminal (CLI) sessions between an administrator’s management
workstation and the TOE. The cryptographic operations necessary to support this TSF are provided by the
22
SCPS – Space Communications Protocol Specification
23
FIPS – Federal Information Processing Standard
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 13 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
CAVP24
validated Cavium CN501 (AES Cert. #105), CN1610 (AES Cert. #1265), and CN1620 (AES Cert.
#1265) HACs, and Blue Coat’s proprietary CAVP validated cryptographic algorithms (AES Cert. #2925,
RSA Cert. #1534, SHA Cert. #2461, DRBG Cert. #539, and HMAC Cert. #1852). Transport Layer
Security (TLS), HTTPS, and SSH are used to secure these communications sessions. In addition, the TOE
provides a variety of cryptographic algorithms for its own use.
1.5.2.3 User Data Protection
The TOE enforces the User Data Protection TSF on user data by ensuring that the buffer area used by
previous network packets is made unavailable during the buffer allocation process. Network packets are
written into memory buffers used for packet processing. The size of incoming packet will be used as the
size for the outgoing packet buffer allocation, ensuring any residual data in the buffer area will not make its
way into the outgoing network packet. The contents of the memory buffers will be overwritten with the
contents of the received packet, ensuring any user data that was previously present is no longer available in
the memory buffer for intentional or unintentional reuse.
1.5.2.4 Identification and Authentication
The TOE provides functionality that requires administrators to verify their claimed identity. The
Identification and Authentication TSF25
ensures that only legitimate administrators can gain access to the
configuration settings and management settings of the TOE. Administrators must log in with a valid user
name and password, X.509 certificate, or RSA key before the TOE will permit the administrators to
manage the TOE. The TOE requires administrators to use strong passwords. No feedback is presented to
Administrators when they are entering their passwords at the login prompt of the CLI when directly
connected to the TOE via a serial connection.
1.5.2.5 Security Management
The TOE provides a feature-rich Management Console and a CLI for administrators to manage the security
functions, configuration, and other features of the TOE. The Security Management function specifies user
roles with defined access for the management of the TOE components.
1.5.2.6 Protection of the TSF
The TOE invokes a set of self tests each time the TOE is powered on to ensure that the TSF operates
correctly. The TOE implements HTTPS for protection of the Management Console and SSH for the
protection of the CLI. HTTPS and SSH protect data transfer and leverages cryptographic capabilities to
prevent replay attacks. The TOE also provides a reliable timestamp for its own use. A digital signature is
used to verify all software updates that are applied to the TOE. The TOE prevents an administrator from
reading plaintext keys or passwords by encrypting this data prior to storage using the AES26
algorithm.
1.5.2.7 TOE Access
The TOE terminates local and remote management sessions after an administrator-configurable time period
of inactivity. The TOE also provides administrator’s the capability to manually terminate the session prior
to the inactivity timeout. After an administrator’s session is terminated, the administrator must log in again
to regain access to TOE functionality. A login banner is displayed for users at the login screen of the
Management Console and at the login prompt of the CLI.
1.5.2.8 Trusted Path/Channels
The cryptographic functionality of the TOE provides the TOE the ability to create trusted paths and trusted
channels. The TOE implements a trusted channel using HTTPS/TLS between itself and a remote server in
order to protect the audit logs as they are being sent to the server. Additionally, the TOE provides trusted
paths between administrators and the CLI via SSH, and between administrators and the Management
24
CAVP – Cryptographic Algorithm Validation Program
25
TSF – TOE Security Functionality
26
AES – Advanced Encryption Standard
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 14 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Console via HTTPS. The management communication channels between the TOE and a remote entity are
distinct from other communication channels and provide mutual identification and authentication. In
addition, the communications are protected from modification and disclosure.
1.5.3 Product Physical/Logical Features and Functionality not
included in the TOE
Features/Functionality that are not part of the evaluated configuration of the TOE are:
 ProxyClient
 BCAAA
 LDAP server
 SNMPv3 monitoring
 Remote management over Telnet
 Front panel configuration
 Remote management over HTTP
 eXtensible markup language (XML) authentication realm
 Session Monitor
 Unauthenticated access to the Visual Policy Manager (VPM)
 Unauthenticated administrative access granted via policy
 All functionality excluded from FIPS mode
 Network Time Protocol (NTP)
 Link State Propagation feature
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 15 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
2 Conformance Claims
This section provides the identification for any CC, Protection Profile (PP), and EAL package conformance
claims. Rationale is provided for any extensions or augmentations to the conformance claims. Rationale
for CC and PP conformance claims can be found in Section 8.1.
Table 3 CC and PP Conformance
Common Criteria
(CC) Identification
and Conformance
Common Criteria for Information Technology Security Evaluation, Version 3.1,
Revision 4, September 2012; CC Part 2 extended; CC Part 3 conformant; PP
claim Security Requirements for Network Devices Protection Profile
conformant; Parts 2 and 3 Interpretations of the CEM27
as of 2013/03/07 were
reviewed, and no interpretations apply to the claims made in this ST.
PP Identification Exact Conformance28
to Security Requirements for Network Devices v1.1
(NDPP)
27
CEM – Common Evaluation Methodology
28
Exact Conformance is a type of Strict Conformance such that the set of SFRs and the SPD/Objectives are exactly as
presented within the accepted NDPP without changes.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 16 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
3 Security Problem
This section describes the security aspects of the environment in which the TOE will be used and the
manner in which the TOE is expected to be employed. It provides the statement of the TOE security
environment, which identifies and explains all:
 Known and presumed threats countered by either the TOE or by the security environment
 Organizational security policies with which the TOE must comply
 Assumptions about the secure usage of the TOE, including physical, personnel and connectivity
aspects
3.1 Threats to Security
This section identifies the threats to the IT29
assets against which protection is required by the TOE or by
the security environment. The threat agents are divided into two categories:
 Attackers who are not TOE users: They have public knowledge of how the TOE operates and are
assumed to possess a low skill level, limited resources to alter TOE configuration settings or
parameters and no physical access to the TOE.
 TOE users: They have extensive knowledge of how the TOE operates and are assumed to possess
a high skill level, moderate resources to alter TOE configuration settings or parameters and
physical access to the TOE.
Both are assumed to have a low level of motivation. The IT assets requiring protection are the TSF30
and
user data saved on the TOE. Removal, diminution and mitigation of the threats are through the objectives
identified in Section 4 Security Objectives. Table 4 below lists the applicable threats.
Table 4 Threats
Name Description
T.ADMIN_ERROR An administrator may incorrectly install or configure the TOE
resulting in ineffective security mechanisms.
T.TSF_FAILURE Security mechanisms of the TOE may fail, leading to a compromise of
the TSF.
T.UNDETECTED_ACTIONS Malicious remote users or external IT entities may take actions that
adversely affect the security of the TOE. These actions may remain
undetected and thus their effects cannot be effectively mitigated.
T.UNAUTHORIZED_ACCESS A user may gain unauthorized access to the TOE data and TOE
executable code. A malicious user, process, or external IT entity may
masquerade as an authorized entity in order to gain unauthorized
access to data or TOE resources. A malicious user, process, or
external IT entity may misrepresent itself as the TOE to obtain
identification and authentication data.
T.UNAUTHORIZED_UPDATE A malicious party attempts to supply the end user with an update to
the product that may compromise the security features of the TOE.
T.USER_DATA_REUSE User data may be inadvertently sent to a destination not intended by
the original sender.
29
IT – Information Technology
30
TSF – TOE Security Functionality
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 17 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
3.2 Organizational Security Policies
An Organizational Security Policy (OSP) is a set of security rules, procedures, or guidelines imposed by an
organization on the operational environment of the TOE. Table 5 below lists the OSPs that are presumed to
be imposed upon the TOE or its operational environment by any organization implementing the TOE in the
CC evaluated configuration.
Table 5 Organizational Security Policies
Name Description
P.ACCESS_BANNER The TOE shall display an initial banner describing restrictions of use,
legal agreements, or any other appropriate information to which users
consent by accessing the TOE.
3.3 Assumptions
This section describes the security aspects of the intended environment for the evaluated TOE. The
operational environment must be managed in accordance with assurance requirement documentation for
delivery, operation, and user guidance. Table 6 lists the specific conditions that are required to ensure the
security of the TOE and are assumed to exist in an environment where this TOE is employed.
Table 6 Assumptions
Name Description
A.NO_GENERAL_PURPOSE It is assumed that there are no general-purpose computing capabilities
(e.g., compilers or user applications) available on the TOE, other than
those services necessary for the operation, administration and support
of the TOE.
A.PHYSICAL Physical security, commensurate with the value of the TOE and the
data it contains, is assumed to be provided by the environment.
A.TRUSTED_ADMIN TOE Administrators are trusted to follow and apply all administrator
guidance in a trusted manner.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 18 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
4 Security Objectives
Security objectives are concise, abstract statements of the intended solution to the problem defined by the
security problem definition (see Section 3). The set of security objectives for a TOE form a high-level
solution to the security problem. This high-level solution is divided into two part-wise solutions: the
security objectives for the TOE, and the security objectives for the TOE’s operational environment. This
section identifies the security objectives for the TOE and its supporting environment.
4.1 Security Objectives for the TOE
The specific security objectives for the TOE are as follows:
Table 7 Security Objectives for the TOE
Name Description
O.PROTECTED_COMMUNICATI
ONS
The TOE will provide protected communication channels for
administrators, other parts of a distributed TOE, and authorized IT
entities.
O.VERIFIABLE_UPDATES The TOE will provide the capability to help ensure that any updates to
the TOE can be verified by the Administrator to be unaltered and
(optionally) from a trusted source.
O.SYSTEM_MONITORING The TOE will provide the capability to generate audit data and send
those data to an external IT entity.
O.DISPLAY_BANNER The TOE will display an advisory warning regarding use of the TOE.
O.TOE_ADMINISTRATION The TOE will provide mechanisms to ensure that only administrators
are able to log in and configure the TOE, and provide protections for
logged-in administrators.
O.RESIDUAL_INFORMATION_C
LEARING
The TOE will ensure that any data contained in a protected resource
is not available when the resource is reallocated.
O.SESSION_LOCK The TOE shall provide mechanisms that mitigate the risk of
unattended sessions being hijacked.
O.TSF_SELF_TEST The TOE will provide the capability to test some subset of its security
functionality to ensure it is operating properly.
4.2 Security Objectives for the Operational
Environment
4.2.1 IT Security Objectives
The following IT security objectives are to be satisfied by the environment:
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 19 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Table 8 IT Security Objectives
Name Description
OE.NO_GENERAL_PURPOSE There are no general-purpose computing capabilities (e.g., compilers
or user applications) available on the TOE, other than those services
necessary for the operation, administration and support of the TOE.
4.2.2 Non-IT Security Objectives
The following non-IT environment security objectives are to be satisfied without imposing technical
requirements on the TOE. That is, they will not require the implementation of functions in the TOE
hardware and/or software. Thus, they will be satisfied largely through application of procedural or
administrative measures.
Table 9 Non-IT Security Objectives
Name Description
OE.PHYSICAL Physical security, commensurate with the value of the TOE and the
data it contains, is provided by the environment.
OE.TRUSTED_ADMIN TOE Administrators are trusted to follow and apply all administrator
guidance in a trusted manner.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 20 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5 Extended Components
This section defines the extended SFRs and extended SARs met by the TOE. These requirements are
presented following the conventions identified in Section 6.1.
5.1 Extended TOE Security Functional
Components
This section specifies the extended SFRs for the TOE. The extended SFRs are organized by class. Table
10 identifies all extended SFRs implemented by the TOE.
Table 10 Extended TOE Security Functional Requirements
Name Description
FAU_STG_EXT.1 External Audit Trail Storage
FCS_CKM_EXT.4 Cryptographic key destruction
FCS_HTTPS_EXT.1 Explicit: HTTPS
FCS_RBG_EXT.1 Extended: Cryptographic Operation (Random Bit Generation)
FCS_SSH_EXT.1 Explicit: SSH
FCS_TLS_EXT.1 Explicit: TLS
FIA_PMG_EXT.1 Password Management
FIA_UAU_EXT.2 Extended: Password-based Authentication Mechanism
FIA_UIA_EXT.1 User Identification and Authentication
FPT_APW_EXT.1 Extended: Protection of Administrator Passwords
FPT_SKP_EXT.1 Extended: Protection of TSF data (for reading of all symmetric keys)
FPT_TST_EXT.1 TSF self test
FPT_TUD_EXT.1 Extended: Trusted Update
FTA_SSL_EXT.1 TSF-initiated session locking
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 21 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.1 Class FAU: Security Audit
Families in this class address the requirements for functions to implement security audit as defined in CC
Part 2.
5.1.1.1 Family FAU_STG: Security audit event storage
Family Behaviour
This extended family FAU_STG_EXT is modeled after the FAU_STG family. This family defines the
requirements for the TSF to be able to create and maintain a secure audit trail. Stored audit records refers
to those records within the audit trail, and not the audit records that have been retrieved (to temporary
storage) through selection. The requirements of the extended family are focused on the secure transmission
of audit records to a remote logging server.
Components in this family address the requirements for protection audit data as defined in CC Part 2. This
section defines the extended components for the FAU_STG_EXT family.
Component Leveling
Figure 3 Extended: Security audit event storage family decomposition
FAU_STG_EXT.1 Extended: External Audit Trail Storage is the only component of this family. This
component requires the TSF to use an external IT entity for audit data storage. It was modeled after
FAU_STG.1.
Management: FAU_STG_EXT.1
a) There are no management activities foreseen.
Audit: FAU_STG_EXT.1
a) There are no audit activities foreseen.
FAU_STG_EXT.1 External Audit Trail Storage
Hierarchical to: No other components
Dependencies: FAU_GEN.1 Audit data generation
FTP_ITC.1 Inter-TSF trusted channel
FAU_STG_EXT.1.1
The TSF shall be able to [selection: transmit the generated audit data to an external IT entity,
receive and store audit data from an external IT entity] using a trusted channel implementing the
[selection: IPsec, SSH, TLS, TLS/HTTPS] protocol.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 22 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.2 Class FCS: Cryptographic Support
Families in this class address the requirements for functions to implement cryptographic functionality as
defined in CC Part 2.
5.1.2.1 Family FCS_CKM: Cryptographic Key Management
Family Behaviour
Cryptographic keys must be managed throughout their life cycle. The FCS_CKM family, after which this
extended family is modeled, is intended to support that lifecycle and consequently defines requirements for
the following activities: cryptographic key generation, cryptographic key distribution, cryptographic key
access and cryptographic key destruction. This family should be included whenever there are functional
requirements for the management of cryptographic keys. The extended family is designed to include
CSP31
s and further defines the requirements for plaintext secret and private cryptographic keys. The
requirements also further define the key destruction methods allowed, per FIPS 140-2 requirements.
Components in this family address the requirements for managing cryptographic keys as defined in CC Part
2. This section defines the extended components for the FCS_CKM_EXT family.
Component Leveling
Figure 4 Extended: Cryptographic key management family decomposition
FCS_CKM_EXT.4 Extended: Cryptographic key zeroization is the only component of this family. This
component requires cryptographic keys and cryptographic critical security parameters to be zeroized. It
was modeled after FCS_CKM.4.
Management: FCS_CKM_EXT.4
a) There are no management activities foreseen.
Audit: FCS_CKM_EXT.4
a) There are no auditable events foreseen.
FCS_CKM_EXT.4 Cryptographic Key Zeroization
Hierarchical to: FCS_CKM.4
Dependencies: [FDP_ITC.1 Import of user data without security attributes, or
FDP_ITC.2 Import of user data with security attributes, or
FCS_CKM.1 Cryptographic key generation]
FCS_CKM_EXT.4.1
The TSF shall zeroize all plaintext secret and private cryptographic keys and CSPs when no longer
required.
31
Critical Security Parameters
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 23 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.2.2 Family FCS_RBG_EXT: Extended: Cryptographic Operation (Random Bit
Generation)
Family Behaviour
Components in this family address the requirements for random number / bit generation. This is a new
family defined for the FCS Class.
Component Leveling
Figure 5 Extended: Cryptographic Operation (Random Bit Generation) family
decomposition
FCS_RBG_EXT.1 Extended: Cryptographic Operation (Random Bit Generation) is the only component of
this class. This component requires random bit generation to be performed in accordance with selected
standards and seeded by an entropy source. It was modeled after FCS_COP.1 Cryptographic operation.
Management: FCS_RBG_EXT.1
a) There are no management activities foreseen.
Audit: FCS_RBG_EXT.1
a) There are no auditable events foreseen.
FCS_RBG_EXT.1 Extended: Cryptographic operation (Random bit generation)
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_RBG_EXT.1.1
The TSF shall perform all random bit generation (RBG) services in accordance with [selection,
choose one of: NIST Special Publication 800-90 using [selection: Hash_DRBG (any),
HMAC_DRBG (any), CTR_DRBG (AES), Dual_EC_DRBG (any)]; FIPS Pub 140-2 Annex C:
X9.31 Appendix 2.4 using AES] seeded by an entropy source that accumulated entropy from
[selection, one or both of: a software-based noise source; a TSF-hardware-based noise source].
FCS_RBG_EXT.1.2
The deterministic RBG shall be seeded with a minimum of [selection, choose one of: 128 bits, 256
bits] of entropy at least equal to the greatest bit length of the keys and authorization factors that it
will generate.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 24 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.2.3 Family FCS_TLS_EXT: Explicit: TLS
Family Behaviour
Components in this family address the requirements for protecting communications using TLS. This is a
new family defined for the FCS Class.
Component Leveling
Figure 6 Explicit: TLS family decomposition
FCS_TLS_EXT.1 Explicit: TLS is the only component of this family. This component requires that TLS
be implemented as specified.
Management: FCS_TLS_EXT.1
a) There are no management activities foreseen.
Audit: FCS_ TLS _EXT.1
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) Successful establishment of a TLS session.
b) Termination of a TLS session.
c) Failure to establish a TLS session.
FCS_TLS_EXT.1 Explicit: TLS
Hierarchical to: No other components.
Dependencies: FCS_COP.1(1) Cryptographic operation (for data encryption/decryption)
FCS_COP.1(2) Cryptographic operation (for cryptographic signatures)
FCS_COP.1(3) Cryptographic operation (for cryptographic hashing)
FCS_TLS_EXT.1.1
The TSF shall implement one or more of the following protocols [selection: TLS 1.0 (RFC 2246),
TLS 1.1 (RFC 4346), TLS 1.2 (RFC 5246)] supporting the following ciphersuites:
Mandatory Ciphersuites:
TLS_RSA_WITH_AES_128_CBC_SHA
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_DHE_RSA_WITH_AES_128_CBC_SHA
TLS_DHE_RSA_WITH_AES_256_CBC_SHA
Optional Ciphersuites:
[selection:
None
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_256_CBC_SHA256
TLS_DHE_RSA_WITH_AES_128_CBC_SHA256
TLS_DHE_RSA_WITH_AES_256_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 25 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384
].
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 26 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.2.4 Family FCS_SSH_EXT: Explicit: SSH
Family Behaviour
Components in this family address the requirements for protecting communications using SSH. This is a
new family defined for the FCS Class.
Component Leveling
Figure 7 Explicit: SSH family decomposition
FCS_SSH_EXT.1 Explicit: SSH is the only component of this family. This component requires that SSH
be implemented as specified.
Management: FCS_SSH_EXT.1
a) There are no management activities foreseen.
Audit: FCS_ SSH _EXT.1
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) Successful establishment of an SSH session.
b) Termination of an SSH session.
c) Failure to establish an SSH session.
FCS_SSH_EXT.1 Explicit: SSH
Hierarchical to: No other components.
Dependencies: FCS_COP.1(1) Cryptographic operation (for data encryption/decryption).
FCS_SSH_EXT.1.1
The TSF shall implement the SSH protocol that complies with RFCs 4251, 4252, 4253, and 4254.
FCS_SSH_EXT.1.2
The TSF shall ensure that the SSH protocol implementation supports the following authentication
methods as described in RFC 4252: public key-based, password-based.
FCS_SSH_EXT.1.3
The TSF shall ensure that, as described in RFC 4253, packets greater than [assignment: number of
bytes] bytes in an SSH transport connection are dropped.
FCS_SSH_EXT.1.4
The TSF shall ensure that the SSH transport implementation uses the following encryption
algorithms: AES-CBC-128, AES-CBC-256, [selection: AEAD_AES_128_GCM,
AEAD_AES_256_GCM, no other algorithms].
FCS_SSH_EXT.1.5
The TSF shall ensure that the SSH transport implementation uses SSH_RSA and [selection: PGP-
SIGN-RSA, PGP-SIGN-DSS, no other public key algorithms] as its public key algorithm(s).
FCS_SSH_EXT.1.6
The TSF shall ensure that data integrity algorithms used in SSH transport connection is [hmac-
sha1, hmac-sha1-96, hmac-md5, hmac-md5-96].
FCS_SSH_EXT.1.7
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 27 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
The TSF shall ensure that diffie-hellman-group14-sha1 is the only allowed key exchange method
used for the SSH protocol.
5.1.2.5 Family FCS_HTTPS_EXT: Explicit: HTTPS
Family Behaviour
Components in this family address the requirements for protecting communications using HTTPS. This is a
new family defined for the FCS Class.
Figure 8 Extended: HTTPS family decomposition
FCS_HTTPS_EXT.1 Extended: HTTPS, requires that HTTPS be implemented.
Management: FCS_HTTPS_EXT.1
a) There are no management activities foreseen.
Audit: FCS_ HTTPS _EXT.1
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) Successful establishment of an HTTPS session.
b) Termination of an HTTPS session.
c) Failure to establish an HTTPS session.
FCS_HTTPS_EXT.1 Extended: HTTPS
Hierarchical to: No other components
Dependencies: FCS_TLS_EXT.1 Extended: TLS
FCS_HTTPS_EXT.1.1
The TSF shall implement the HTTPS protocol that complies with RFC32
2818.
FCS_HTTPS_EXT.1.2
The TSF shall implement the HTTPS protocol using TLS as specified in FCS_TLS_EXT.1.
32
RFC – Request For Comments
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 28 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.3 Class FIA: Identification and Authentication
Families in this class address the requirements for functions to establish and verify a claimed user identity
as defined in CC Part 2.
5.1.3.1 Family FIA_PMG_EXT: Password Management
Family Behaviour
This family defines the password strength rules enforced by the TSF.
This section defines the extended components for the FIA_PMG_EXT family, which is modeled after
FIA_SOS Specification of secrets.
Component Leveling
Figure 9 Password Management family decomposition
FIA_PMG_EXT.1 Password Management is the only component of this family. This component defines
the password strength requirements that the TSF will enforce.
Management: FIA_PMG_EXT.1
The following actions could be considered for the management functions in FMT:
a) Administrator configuration of strength requirements.
Audit: FIA_PMG_EXT.1
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) There are no auditable events foreseen.
FIA_PMG_EXT.1 Password Management
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_PMG_EXT.1.1
The TSF shall provide the following password management capabilities for administrative
passwords:
1. Passwords shall be able to be composed of any combination of upper and lower case
letters, numbers, and the following special characters: [selection: “!”, “@”, “#”, “$”, “%”,
“^”, “&”, “*”, “(”, “)”, [assignment: other characters]];
2. Minimum password length shall settable by the Security Administrator, and support
passwords of 15 characters or greater.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 29 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.3.2 Family FIA_UAU_EXT: User Authentication
Family Behaviour
This family defines the types of user authentication mechanisms supported by the TSF.
This section defines the extended components for the FIA_UAU_EXT family, which is modeled after the
FIA_UAU User authentication family.
Component Leveling
Figure 10 User authentication family decomposition
FIA_UAU_EXT.2 Extended: Password-based authentication mechanism is the only component of this
family. This component requires a local password-based authentication mechanism. In addition, other
authentication mechanisms can be specified.
Management: FIA_UAU_EXT.2
The following actions could be considered for the management functions in FMT:
a) Reset a user password by an administrator.
Audit: FIA_UAU_EXT.2
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) All use of the authentication mechanisms.
FIA_UAU_EXT.2 Extended: Password-based authentication mechanism
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_UAU_EXT.2.1
The TSF shall provide a local password-based authentication mechanism, [selection: [assignment:
other authentication mechanism(s)], none] to perform administrative user authentication.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 30 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.3.3 Family FIA_UIA_EXT: User Identification and Authentication
Family Behaviour
This family defines the types of user identification and authentication mechanisms supported by the TSF.
This section defines the components for the extended FIA_UIA_EXT family, which is modeled after the
FIA_UAU and FIA_UID families.
Component Leveling
Figure 11 User Identification and Authentication family decomposition
FIA_UIA_EXT.1 User identification and authentication is the only component of this class, and is modeled
after a combination of FIA_UAU.1 and FIA_UID.1. This component defines the actions available to users
prior to initiating the identification and authentication process, and requires administrative users to be
successfully identified and authenticated prior to interacting with the TSF.
Management: FIA_UIA_EXT.1
The following actions could be considered for the management functions in FMT:
a) Management of the authentication data by an administrator;
b) Management of the authentication data by the associated user;
c) Managing the list of actions that can be taken before the user is identified and authenticated;
d) Management of the user identities;
Audit: FIA_UIA_EXT.1
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) All use of the identification and authentication mechanism.
FIA_UIA_EXT.1 User identification and authentication
Hierarchical to: FIA_UID.1 Timing of identification
FIA_UAU.1 Timing of Authentication
Dependencies: FTA_TAB.1 Default TOE access banners
FIA_UIA_EXT.1.1
The TSF shall allow the following actions prior to requiring the non-TOE entity to initiate the
identification and authentication process:
 Display the warning banner in accordance with FTA_TAB.1;
 [selection: no other actions, [assignment: list of services, actions performed by the TSF in
response to non-TOE requests.]]
FIA_UIA_EXT.1.2
The TSF shall require each administrative user to be successfully identified and authenticated
before allowing any other TSF-mediated actions on behalf of that administrative user.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 31 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.4 Class FPT: Protection of the TSF
Families in this class address the requirements for functions providing integrity and management of
mechanisms that constitute the TSF and of the TSF data as defined in CC Part 2.
5.1.4.1 Family FPT_APW_EXT: Extended: Protection of Administrator Passwords
Family Behaviour
Components in this family address the requirements for protection of administrator passwords. This is a
new family defined for the FPT class.
Component Leveling
Figure 12 Extended: Protection of administrator passwords family decomposition
FPT_APW_EXT.1 Extended: Protection of Administrator Passwords, requires administrator passwords to
be stored in non-plaintext form and requires the TOE to prevent reading of plaintext passwords. It was
modeled after FPT_SSP.2.
Management: FPT_APW_EXT.1
The following actions could be considered for the management functions in FMT:
a) There are no management activities foreseen.
Audit: FPT_APW_EXT.1
a) There are no auditable events foreseen.
FPT_APW_EXT.1 Extended: Protection of administrator passwords
Hierarchical to: No other components
Dependencies: No dependencies.
FPT_APW_EXT.1.1
The TSF shall store passwords in non-plaintext form.
FPT_APT_EXT.1.2
The TSF shall prevent the reading of plaintext passwords.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 32 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.4.2 Family FPT_SKP_EXT: Extended: Protection of TSF Data
Family Behaviour
Components in this family address the requirements for protection of symmetric keys stored on the TOE.
Component Leveling
Figure 13 Extended: Protection of TSF data (for reading of all symmetric keys)
FPT_SKP_EXT.1 Extended: Protection of TSF data (for reading of all symmetric keys), requires the TOE
to prevent reading of all pre-shared, symmetric, and private keys. It was modeled after FPT_SSP.1.
Management: FPT_SKP_EXT.1
a) There are no management activities foreseen.
Audit: FPT_SKP_EXT.1
a) There are no audit activities foreseen.
FPT_SKP_EXT.1 Extended: Protection of TSF data (for reading of all symmetric keys)
Hierarchical to: No other components
Dependencies: No dependencies.
FPT_SKP_EXT.1.1
The TSF shall prevent reading of all pre-shared keys, symmetric keys, and private keys.
FPT_SKP_EXT: Extended: Protection of TSF data (for reading of
all symmetric keys)
1
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 33 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.4.3 Family FPT_TST_EXT: TSF Testing
Family Behaviour
Components in this family address the requirements for self-testing the TSF for selected correct operation.
The extended FPT_TST_EXT family is modeled after the FPT_TST family.
Component Leveling
Figure 14 Extended: TSF testing family decomposition
FPT_TST _EXT.1: TSF testing is the only component of this family. This component requires a suite of
self tests to be run during initial start-up in order to demonstrate correct operation of the TSF.
Management: FPT_TST _EXT.1
a) There are no management activities foreseen.
Audit: FPT_TST _EXT.1
a) There are no auditable activities foreseen.
FPT_TST_EXT.1 TSF testing
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_TST_EXT.1.1
The TSF shall run a suite of self tests during initial start-up (on power on) to demonstrate the
correct operation of the TSF.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 34 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.4.4 Family FPT_TUD_EXT: Extended: Trusted Update
Family Behaviour
Components in this family address the requirements for updating the TOE firmware and/or software. This
is a new family defined for the FPT Class.
Component Leveling
Figure 15 Extended: Trusted update family decomposition
FPT_TUD_EXT.1 Extended: Trusted update, requires management tools be provided to update the TOE
firmware and software, including the ability to verify the updates prior to installation. It is the only
component of this family.
Management: FPT_ TUD_EXT.1
a) There are no management activities foreseen.
Audit: FPT_ TUD_EXT.1
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) The initiation of the update.
FPT_TUD_EXT.1 Extended: Trusted update
Hierarchical to: No other components.
Dependencies: [FCS_COP.1(2) Cryptographic operation (for cryptographic signature), or
FCS_COP.1(3) Cryptographic operation (for cryptographic hashing)]
FPT_TUD_EXT.1.1
The TSF shall provide security administrators the ability to query the current version of the TOE
firmware/software.
FPT_TUD_EXT.1.2
The TSF shall provide security administrators the ability to initiate updates to TOE
firmware/software.
FPT_TUD_EXT.1.3
The TSF shall provide a means to verify firmware/software updates to the TOE using a [selection:
digital signature mechanism, published hash] prior to installing those updates.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 35 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.1.5 Class FTA: TOE Access
Families in this class specify functional requirements for controlling the establishment of a user's session as
defined in CC Part 2.
5.1.5.1 Family FTA_SSL_EXT: TSF-initiated Session Locking
Family Behaviour
Components in this family address the requirements for TSF-initiated and user-initiated locking, unlocking,
and termination of interactive sessions.
The extended FTA_SSL_EXT family is based on the FTA_SSL family.
Component Leveling
Figure 16 TSF-initiated session locking family decomposition
FTA_SSL_EXT.1: TSF-initiated session locking, requires system initiated locking of an interactive session
after a specified period of inactivity. It is the only component of this family.
Management: FTA_SSL_EXT.1
The following actions could be considered for the management functions in FMT:
a) Specification of the time of user inactivity after which lock-out occurs for an individual user.
Audit: FTA_SSL_EXT.1
The following actions should be auditable if FAU_GEN Security audit data generation is included in the
PP/ST:
a) Any attempts at unlocking an interactive session.
FTA_SSL_EXT.1 TSF-initiated session locking
Hierarchical to: No other components.
Dependencies: No dependencies.
FTA_SSL_EXT.1.1
The TSF shall, for local interactive sessions, [selection:
 lock the session - disable any activity of the user’s data access/display devices other than
unlocking the session, and requiring that the administrator re-authenticate to the TSF
prior to unlocking the session;
 terminate the session].
after a Security Administrator-specified time period of inactivity.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 36 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
5.2 Extended TOE Security Assurance
Components
There are no extended TOE Security Assurance Components.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 37 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6 Security Requirements
This section defines the SFRs and SARs met by the TOE. These requirements are presented following the
conventions identified in Section 6.1.
6.1 Conventions
There are several font variations used within this ST. Selected presentation choices are discussed here to
aid the Security Target reader.
The CC allows for assignment, refinement, selection and iteration operations to be performed on security
functional requirements. All of these operations are used within this ST. These operations are performed
as described in Part 2 of the CC, and are shown as follows:
 Completed assignment statements made by the ST author are identified using [italicized text
within brackets].
 Completed selection statements are identified using [underlined text within brackets]. In keeping
with these conventions, in the event an assignment is within a selection, it will be depicted as
italicized, underlined text.
 Refinements are identified using bold text. Any text removed is stricken (Example: TSF Data)
and should be considered as a refinement. In keeping with these conventions, in the event a
refinement is within an assignment, it will be depicted as bold italicized text, and when a
refinement is within a selection, it will be depicted in bold underlined text.
 Extended Functional and Assurance Requirements are identified using “_EXT” at the end of the
short name.
 Iterations are identified by appending a number in parentheses following the component title. For
example, FAU_GEN.1(1) Audit Data Generation would be the first iteration and FAU_GEN.1(2)
Audit Data Generation would be the second iteration.
6.2 Security Functional Requirements
This section specifies the SFRs for the TOE. This section organizes the SFRs by CC class. Table 11
identifies all SFRs implemented by the TOE and indicates the ST operations performed on each
requirement.
Table 11 TOE Security Functional Requirements
Name Description S A R I
FAU_GEN.1 Audit Data Generation 

FAU_GEN.2 User Identity Association  
FAU_STG_EXT.1 External Audit Trail Storage 

FCS_CKM.1 Cryptographic Key Generation (for Asymmetric
Keys)

 
FCS_CKM_EXT.4 Cryptographic Key Zeroization   
FCS_COP.1(1) Cryptographic Operation (for Data
Encryption/Decryption)




FCS_COP.1(2) Cryptographic Operation (for Cryptographic
Signature)

 

Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 38 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Name Description S A R I
FCS_COP.1(3) Cryptographic Operation (for Cryptographic
Hashing)




FCS_COP.1(4) Cryptographic Operation (for Keyed-Hash Message
Authentication)




FCS_HTTPS_EXT.1 Explicit: HTTPS    
FCS_RBG_EXT.1 Extended: Cryptographic Operation (Random Bit
Generation)

  
FCS_SSH_EXT.1 Explicit: SSH 

 
FCS_TLS_EXT.1 Explicit: TLS 
  
FDP_RIP.2 Full Residual Information Protection 
  
FIA_PMG_EXT.1 Password Management    
FIA_UAU.7 Protected Authentication Feedback  
 
FIA_UAU_EXT.2 Extended: Password-based Authentication
Mechanism


 
FIA_UIA_EXT.1 User Identification and Authentication 

 
FMT_MTD.1 Management of TSF data (for General TSF Data) 

 
FMT_SMF.1 Specification of Management Functions 

 
FMT_SMR.2 Restrictions on Security Roles 

 
FPT_APW_EXT.1 Extended: Protection of Administrator Passwords    
FPT_SKP_EXT.1 Extended: Protection of TSF Data (for reading of all
Symmetric Keys)
   
FPT_STM.1 Reliable Time Stamps    
FPT_TST_EXT.1 TSF testing    
FPT_TUD_EXT.1 Extended: Trusted Update 
  
FTA_SSL.3 TSF-initiated Termination  


FTA_SSL.4 User-initiated Termination    
FTA_SSL_EXT.1 TSF-initiated session locking 
  
FTA_TAB.1 Default TOE access banners   

FTP_ITC.1 Inter-TSF Trust Channel 



FTP_TRP.1 Trusted Path 



Note: S=Selection; A=Assignment; R=Refinement; I=Iteration
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 39 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.1 Class FAU: Security Audit
FAU_GEN.1 Audit data generation
Hierarchical to: No other components.
Dependencies: FPT_STM.1 Reliable time stamps
FAU_GEN.1.1
The TSF shall be able to generate an audit record of the following auditable events:
a) Start-up and shutdown of the audit functions;
b) All auditable events, for the not specified level of audit; and
c) All administrative actions;
d) [Specifically defined auditable events listed in Table 12.]
Table 12 Auditable Events
Requirement Auditable Events Additional Audit Record Contents
FAU_GEN.1 None. None.
FAU_GEN.2 None. None.
FAU_STG_EXT.1 None. None.
FCS_CKM.1 None. None.
FCS_CKM_EXT.4 None. None.
FCS_COP.1(1) None. None.
FCS_COP.1(2) None. None.
FCS_COP.1(3) None. None.
FCS_COP.1(4) None. None.
FCS_RBG_EXT.1 None. None.
FCS_HTTPS_EXT.1 Failure to establish a HTTPS Session.
Establishment/Termination of a HTTPS
session.
Reason for failure.
Non-TOE endpoint of connection (IP
address) for both successes and failures.
FCS_TLS_EXT.1 Failure to establish a TLS Session.
Establishment/Termination of a TLS
session.
Reason for failure.
Non-TOE endpoint of connection (IP
address) for both successes and failures.
FCS_SSH_EXT.1 Failure to establish an SSH Session.
Establishment/Termination of an SSH
session.
Reason for failure.
Non-TOE endpoint of connection (IP
address) for both successes and failures.
FDP_RIP.2 None. None.
FIA_PMG_EXT.1 None. None.
FIA_UIA_EXT.1 All use of the identification and
authentication mechanism.
Provided user identity, origin of the
attempt (e.g., IP address).
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 40 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Requirement Auditable Events Additional Audit Record Contents
FIA_UAU_EXT.2 All use of the authentication
mechanism.
Origin of the attempt (e.g., IP address).
FIA_UAU.7 None. None.
FMT_MTD.1 None. None.
FMT_SMF.1 None. None.
FMT_SMR.2 None. None.
FPT_APW_EXT.1 None. None.
FPT_SKP_EXT.1 None. None.
FPT_STM.1 Changes to the time. The old and new values for the time.
Origin of the attempt (e.g., IP address).
FPT_TUD_EXT.1 Initiation of update. No additional information.
FPT_TST_EXT.1 None. None.
FTA_SSL_EXT.1 Any attempts at unlocking of an
interactive session.
No additional information.
FTA_SSL.3 The termination of a remote session by
the session locking mechanism.
No additional information.
FTA_SSL.4 The termination of an interactive
session.
No additional information.
FTA_TAB.1 None. None.
FTP_ITC.1 Initiation of the trusted channel.
Termination of the trusted channel.
Failure of the trusted channel
functions.
Identification of the initiator and target
of failed trusted channels establishment
attempts.
FTP_TRP.1 Initiation of the trusted path.
Termination of the trusted path.
Failure of the trusted path functions.
Identification of the claimed user identity.
FAU_GEN.1.2
The TSF shall record within each audit record at least the following information:
a) Date and time of the event, type of event, subject identity, and the outcome (success or
failure) of the event; and
b) For each audit event type, based on the auditable event definitions of the functional
components included in the PP/ST, [information specified in column three of Table 12].
FAU_GEN.2 User identity association
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FIA_UID.1 Timing of identification
FAU_GEN.2.1
For audit events resulting from actions of identified users, the TSF shall be able to associate each
auditable event with the identity of the user that caused the event.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 41 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
FAU_STG_EXT.1 External audit trail storage
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FTP_ITC.1 Inter-TSF trusted channel
FAU_STG_EXT.1.1
The TSF shall be able to [transmit the generated audit data to an external IT entity] using a trusted
channel implementing the [TLS/HTTPS] protocol.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 42 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.2 Class FCS: Cryptographic Support
FCS_CKM.1 Cryptographic key generation
Hierarchical to: No other components.
Dependencies: FCS_COP.1 Cryptographic operation
FCS_CKM.4 Cryptographic key destruction
FCS_CKM.1.1
Refinement: The TSF shall generate asymmetric cryptographic keys used for key establishment
in accordance [NIST33
Special Publication 800-56B, “Recommendation for Pair-Wise Key
Establishment Schemes Using Integer Factorization Cryptography” for RSA-based key
establishment schemes] and specified cryptographic key sizes equivalent to, or greater than, a
symmetric key strength of 112.
FCS_CKM_EXT.4 Cryptographic key destruction
Hierarchical to: No other components.
Dependencies: FCS_CKM.1 Cryptographic key generation
FCS_CKM_EXT.4.1
The TSF shall zeroize all plaintext secret and private cryptographic keys and CSPs when no longer
required.
FCS_COP.1(1) Cryptographic operation (for data encryption/decryption)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1 Cryptographic key generation
FCS_CKM.4 Cryptographic key destruction
FCS_COP.1(1).1
Refinement: The TSF shall perform [encryption and decryption] in accordance with a specified
cryptographic algorithm [AES operating in [ECB, CBC, OFB, and CFB-128 bit modes]] and
cryptographic key sizes 128-bits, 256-bits, and [192-bits] that meet the following:
 FIPS PUB 197, “Advanced Encryption Standard (AES)”
 [NIST SP 800-38A].
33
NIST – National Institute of Standards and Technology
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 43 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
FCS_COP.1(2) Cryptographic operation (for cryptographic signature)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1 Cryptographic key generation
FCS_CKM.4 Cryptographic key destruction
FCS_COP.1(2).1
Refinement: The TSF shall perform cryptographic signature services in accordance with a
[RSA Digital Signature Algorithm (rDSA) with a key size (modulus) of 2048 bits or greater]
that meets the following:
 FIPS PUB 186-2 or FIPS PUB 186-3, “Digital Signature Standard”
FCS_COP.1(3) Cryptographic operation (for cryptographic hashing)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1 Cryptographic key generation
FCS_CKM.4 Cryptographic key destruction
FCS_COP.1(3).1
Refinement: The TSF shall perform [cryptographic hashing services] in accordance with a
specified cryptographic algorithm [SHA-1, SHA-224, SHA-256, SHA-384, SHA-512] and
message digest sizes [160, 224, 256, 384, 512] bits that meet the following: FIPS Pub 180-3,
“Secure Hash Standard.”
FCS_COP.1(4) Cryptographic operation (for keyed-hash message authentication)
Hierarchical to: No other components.
Dependencies: FCS_CKM.1 Cryptographic key generation
FCS_CKM.4 Cryptographic key destruction
FCS_COP.1(4).1
Refinement: The TSF shall perform [keyed-hash message authentication] in accordance with a
specified cryptographic algorithm HMAC-[SHA-1, SHA-224, SHA-256, SHA-384, SHA-512],
key size [160, 224, 256, 384, 512], and message digest sizes [160, 224, 256, 384, 512] bits that
meet the following: FIPS Pub 198-1, “The Keyed-Hash Message Authentication Code”, and FIPS
Pub 180-3, “Secure Hash Standard”.
FCS_HTTPS_EXT.1 Explicit: HTTPS
Hierarchical to: No other components.
Dependencies: FCS_TLS_EXT.1
FCS_HTTPS_EXT.1.1
The TSF shall implement the HTTPS protocol that complies with RFC 2818.
FCS_HTTPS_EXT.1.2
The TSF shall implement HTTPS using TLS as specified in FCS_TLS_EXT.1.
FCS_RBG_EXT.1 Extended: Cryptographic operation (Random bit generation)
Hierarchical to: No other components.
Dependencies: No dependencies.
FCS_RBG_EXT.1.1
The TSF shall perform all random bit generation (RBG) services in accordance with [NIST
Special Publication 800-90 using [CTR_DRBG (using AES-256)]] seeded by an entropy source
that accumulated entropy from [a software-based noise source; a TSF-hardware-based noise
source].
FCS_RBG_EXT.1.2
The deterministic RBG shall be seeded with a minimum of [256 bits] of entropy at least equal to
the greatest bit length of the keys and authorization factors that it will generate.
FCS_SSH_EXT.1 Explicit: SSH
Hierarchical to: No other components.
Dependencies: FCS_COP.1(1) Cryptographic operation (for data encryption/decryption).
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 44 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
FCS_SSH_EXT.1.1
The TSF shall implement the SSH protocol that complies with RFCs 4251, 4252, 4253, and 4254.
FCS_SSH_EXT.1.2
The TSF shall ensure that the SSH protocol implementation supports the following authentication
methods as described in RFC 4252: public key-based, password-based.
FCS_SSH_EXT.1.3
The TSF shall ensure that, as described in RFC 4253, packets greater than [256k] bytes in an SSH
transport connection are dropped.
FCS_SSH_EXT.1.4
The TSF shall ensure that the SSH transport implementation uses the following encryption
algorithms: AES-CBC-128, AES-CBC-256, [no other algorithms].
FCS_SSH_EXT.1.5
The TSF shall ensure that the SSH transport implementation uses SSH_RSA and [no other public
key algorithms] as its public key algorithm(s).
FCS_SSH_EXT.1.6
The TSF shall ensure that data integrity algorithms used in SSH transport connection is [hmac-
sha1, hmac-sha1-96].
FCS_SSH_EXT.1.7
The TSF shall ensure that diffie-hellman-group14-sha1 is the only allowed key exchange method
used for the SSH protocol.
FCS_TLS_EXT.1 Explicit: TLS
Hierarchical to: No other components.
Dependencies: FCS_COP.1(1) Cryptographic operation (for data encryption/decryption)
FCS_COP.1(2) Cryptographic operation (for cryptographic signatures)
FCS_COP.1(3) Cryptographic operation (for cryptographic hashing)
FCS_TLS_EXT.1.1
The TSF shall implement one or more of the following protocols [TLS 1.0 (RFC 2246), TLS 1.1
(RFC 4346), TLS 1.2 (RFC 5246)] supporting the following ciphersuites:
Mandatory Ciphersuites:
TLS_RSA_WITH_AES_128_CBC_SHA
TLS_RSA_WITH_AES_256_CBC_SHA
TLS_DHE_RSA_WITH_AES_128_CBC_SHA
TLS_DHE_RSA_WITH_AES_256_CBC_SHA
Optional Ciphersuites:
[TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_RSA_WITH_AES_256_CBC_SHA256].
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 45 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.3 Class FDP: User Data Protection
FDP_RIP.2 Full Residual Information Protection
Hierarchical to: No other components.
Dependencies: No dependencies.
FDP_RIP.2.1
The TSF shall ensure that any previous information content of a resource is made unavailable
upon the [allocation of the resource to] all objects.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 46 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.4 Class FIA: Identification and Authentication
FIA_PMG_EXT.1 Password management
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_PMG_EXT.1.1
The TSF shall provide the following password management capabilities for administrative
passwords:
1. Passwords shall be able to be composed of any combination of upper and lower case
letters, numbers, and the following special characters: [“!”, “@”, “#”, “$”, “%”, “^”, “&”,
“*”, “(”, “)”, [all other ASCII34
characters including ‘ ‘ (the space character)]];
2. Minimum password length shall settable by the Security Administrator, and support
passwords of 15 characters or greater.
FIA_UIA_EXT.1 User identification and authentication
Hierarchical to: No other components.
Dependencies: FTA_TAB.1 Default TOE access banners
FIA_UIA_EXT.1.1
The TSF shall allow the following actions prior to requiring the non-TOE entity to initiate the
identification and authentication process:
 Display the warning banner in accordance with FTA_TAB.1;
 [[no other actions]]
FIA_UIA_EXT.1.2
The TSF shall require each administrative user to be successfully identified and authenticated
before allowing any other TSF-mediated actions on behalf of that administrative user.
FIA_UAU_EXT.2 Extended: Password-based authentication mechanism
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_UAU_EXT.2.1
The TSF shall provide a local password-based authentication mechanism, [[local RSA35
public
key-based authentication mechanism, X.509 certificate-based authentication mechanism,
Integrated Windows Authentication (IWA) realm using BCAAA or LDAP]] to perform
administrative user authentication.
FIA_UAU.7 Protected authentication feedback
Hierarchical to: No other components.
Dependencies: FIA_UAU.1
FIA_UAU.7.1
The TSF shall provide only obscured feedback to the user while the authentication is in progress at
the local console.
34
ASCII – American Standard Code for Information Interchange
35
RSA – Rivest, Shamir, Adleman
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 47 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.5 Class FMT: Security Management
FMT_MTD.1 Management of TSF data (for general TSF data)
Hierarchical to: No other components.
Dependencies: FMT_SMF.1 Specification of management functions
FMT_SMR.1 Security roles
FMT_MTD.1.1
The TSF shall restrict the ability to manage the TSF data to the Security Administrators36
.
FMT_SMF.1 Specification of management functions
Hierarchical to: No other components.
Dependencies: FIA_UIA_EXT.1 User Identification and Authentication
FCS_COP.1(2) Cryptographic operation (for cryptographic signature)
FPT_TUD_EXT.1 Extended: Trusted Update
FMT_SMF.1.1
The TSF shall be capable of performing the following management functions:
 Ability to administer the TOE locally and remotely;
 Ability to update the TOE, and to verify the updates using [digital signature] capability prior to
installing those updates;
 [Ability to configure the cryptographic functionality]
FMT_SMR.2 Restrictions on security roles
Hierarchical to: No other components.
Dependencies: FIA_UID.1 Timing of identification
FMT_SMR.2.1
The TSF shall maintain the roles:
 Authorized Administrator.
FMT_SMR.2.2
The TSF shall be able to associate users with roles.
FMT_SMR.2.3
The TSF shall ensure that the conditions
 Authorized Administrator role shall be able to administer the TOE locally;
 Authorized Administrator role shall be able to administer the TOE remotely;
are satisfied.
36
Security Administrators are administrators of the TOE with the Privileged Administrator role.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 48 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.6 Class FPT: Protection of the TSF
FPT_SKP_EXT.1 Extended: Protection of TSF data (for reading of all symmetric keys)
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_SKP_EXT.1.1
The TSF shall prevent reading of all pre-shared keys, symmetric key, and private keys.
FPT_APW_EXT.1 Extended: Protection of administrator passwords
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_APW_EXT.1.1
The TSF shall store passwords in non-plaintext form.
FPT_APW_EXT.1.2
The TSF shall prevent reading of the plaintext passwords.
FPT_STM.1 Reliable time stamps
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_STM.1.1
The TSF shall be able to provide reliable time stamps for its own use.
FPT_TUD_EXT.1 Extended: Trusted update
Hierarchical to: No other components.
Dependencies: [FCS_COP.1(2) Cryptographic operation (for cryptographic signature)]
FPT_TUD_EXT.1.1
The TSF shall provide security administrators the ability to query the current version of the TOE
firmware/software.
FPT_TUD_EXT.1.2
The TSF shall provide security administrators the ability to initiate updates to TOE
firmware/software.
FPT_TUD_EXT.1.3
The TSF shall provide a means to verify firmware/software updates to the TOE using a [digital
signature mechanism] prior to installing those updates.
FPT_TST_EXT.1 TSF testing
Hierarchical to: No other components.
Dependencies: No dependencies.
FPT_TST_EXT.1.1
The TSF shall run a suite of self tests during initial start-up (on power on) to demonstrate the
correct operation of the TSF.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 49 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.7 Class FTA: TOE Access
FTA_SSL_EXT.1 TSF-initiated session locking
Hierarchical to: No other components.
Dependencies: No dependencies.
FTA_SSL_EXT.1.1
The TSF shall, for local interactive sessions, [terminate the session] after a Security
Administrator-specified time period of inactivity.
FTA_SSL.3 TSF-initiated termination
Hierarchical to: No other components.
Dependencies: No dependencies.
FTA_SSL.3.1
Refinement: The TSF shall terminate a remote interactive session after a [Security
Administrator-configurable time interval of user inactivity].
FTA_SSL.4 User-initiated termination
Hierarchical to: No other components.
Dependencies: No dependencies.
FTA_SSL.4.1
The TSF shall allow Administrator-initiated termination of the Administrator’s own interactive
session.
FTA_TAB.1 Default TOE access banners
Hierarchical to: No other components.
Dependencies: No dependencies.
FTA_TAB.1.1
Refinement: Before establishing an administrative user session, the TSF shall display a
Security Administrator-specified advisory notice and consent warning message regarding use
of the TOE.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 50 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.2.8 Class FTP: Trusted Path/Channels
FTP_ITC.1 Inter-TSF trusted channel
Hierarchical to: No other components.
Dependencies: FCS_TLS_EXT.1 Explicit: TLS
FCS_HTTPS_EXT.1 Explicit: HTTPS
FTP_ITC.1.1
Refinement: The TSF shall use [TLS, TLS/HTTPS] to provide a trusted communication
channel between itself and authorized IT entities supporting the following capabilities: audit
server, [authentication server] that is logically distinct from other communication channels and
provides assured identification of its end points and protection of the channel data from
disclosure and detection of modification of the channel data.
FTP_ITC.1.2
The TSF shall permit the TSF, or the authorized IT entities to initiate communication via the
trusted channel.
FTP_ITC.1.3
The TSF shall initiate communication via the trusted channel for [the remote authentication
server].
FTP_TRP.1 Trusted path
Hierarchical to: No other components.
Dependencies: FCS_SSH_EXT.1 Explicit: SSH
FCS_HTTPS_EXT.1 Explicit: HTTPS
FCS_TLS_EXT.1 Explicit: TLS
FTP_TRP.1.1
Refinement: The TSF shall use [SSH, TLS/HTTPS] provide a trusted communication path
between itself and remote administrators that is logically distinct from other communication
paths and provides assured identification of its end points and protection of the communicated
data from disclosure and detection of modification of the communicated data.
FTP_TRP.1.2
Refinement: The TSF shall permit remote administrators to initiate communication via the
trusted path.
FTP_TRP.1.3
The TSF shall require the use of the trusted path for initial administrator authentication and all
remote administrative actions.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 51 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
6.3 Security Assurance Requirements
This section defines the assurance requirements for the TOE. Assurance requirements are taken from the
CC Part 3.
Table 13 below summarizes the requirements.
Table 13 NDPP Assurance Requirements
Assurance Requirements
Class ASE: Security Target
evaluation
ASE_CCL.1 Conformance claims
ASE_ECD.1 Extended components definition
ASE_INT.1 ST introduction
ASE_OBJ.1 Security objectives for the operational
environment
ASE_REQ.1 Stated security requirements
ASE_TSS.1 TOE summary specification
Class ALC : Life Cycle Support ALC_CMC.1 Labeling of the TOE
ALC_CMS.1 TOE CM Coverage
Class ADV: Development ADV_FSP.1 Basic functional specification
Class AGD: Guidance documents AGD_OPE.1 Operational user guidance
AGD_PRE.1 Preparative procedures
Class ATE: Tests ATE_IND.1 Independent testing – conformance
Class AVA: Vulnerability assessment AVA_VAN.1 Vulnerability survey
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 52 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
7 TOE Summary Specification
This section presents information to detail how the TOE meets the functional requirements described in
previous sections of this ST.
7.1 TOE Security Functions
Each of the security requirements and the associated descriptions correspond to the security functions.
Hence, each function is described by how it specifically satisfies each of its related requirements. This
serves to both describe the security functions and rationalize that the security functions satisfy the
necessary requirements.
Table 14 Mapping of TOE Security Functions to Security Functional Requirements
TOE Security Function SFR ID Description
Security Audit FAU_GEN.1 Audit Data Generation
FAU_GEN.2 User Identity Association
FAU_STG_EXT.1 External Audit Trail Storage
Cryptographic Support FCS_CKM.1 Cryptographic Key Generation
(for Asymmetric Keys)
FCS_CKM_EXT.4 Cryptographic Key Zeroization
FCS_COP.1(1) Cryptographic Operation (for
Data Encryption/Decryption)
FCS_COP.1(2) Cryptographic Operation (for
Cryptographic Signature)
FCS_COP.1(3) Cryptographic Operation (for
Cryptographic Hashing)
FCS_COP.1(4) Cryptographic Operation (for
Keyed-Hash Message
Authentication)
FCS_HTTPS_EXT.1 Explicit: HTTPS
FCS_RBG_EXT.1 Extended: Cryptographic
Operation (Random Bit
Generation)
FCS_SSH_EXT.1 Explicit: SSH
FCS_TLS_EXT.1 Explicit: TLS
User Data Protection FDP_RIP.2 Full Residual Information
Protection
Identification and Authentication FIA_PMG_EXT.1 Password Management
FIA_UAU.7 Protected Authentication
Feedback
FIA_UAU_EXT.2 Extended: Password-based
Authentication Mechanism
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 53 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
TOE Security Function SFR ID Description
FIA_UIA_EXT.1 User Identification and
Authentication
Security Management FMT_MTD.1 Management of TSF data (for
General TSF Data)
FMT_SMF.1 Specification of Management
Functions
FMT_SMR.2 Restrictions on Security Roles
Protection of the TSF FPT_APW_EXT.1 Extended: Protection of
Administrator Passwords
FPT_SKP_EXT.1 Extended: Protection of TSF Data
(for reading of all Symmetric
Keys)
FPT_STM.1 Reliable Time Stamps
FPT_TST_EXT.1 TSF testing
FPT_TUD_EXT.1 Extended: Trusted Update
TOE Access FTA_SSL.3 TSF-initiated Termination
FTA_SSL.4 User-initiated Termination
FTA_SSL_EXT.1 TSF-initiated session locking
FTA_TAB.1 Default TOE access banners
Trusted path/channels FTP_ITC.1 Inter-TSF Trust Channel
FTP_TRP.1 Trusted Path
7.1.1 Security Audit
The Security Audit function provides the TOE with the functionality of generating audit records. As
administrators manage and configure the TOE, their activities are tracked and recorded as audit records and
are stored in the TOE’s file system. The resulting audit records can be examined to determine which
security relevant activities took place and who (i.e., which user) is responsible for those activities.
The TOE provides auditing of all administrator actions and of all events explicitly listed in Table 12 that
occur within the CLI and Management Console administrative interfaces. For audit events that result from
actions of identified users, the TOE associates the action with the user who took the action in the logs.
The Audit Log entries contain at a minimum the following fields:
 Date and time of the event
 Type of event
 Identity of the subject
 Outcome of the event
Additional fields will be found in addition to these fields for those events that explicitly require additional
information as defined in the “Additional Audit Record Contents” column of Table 12.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 54 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
The TOE supports the SSH, TLS, and HTTPS protocols and will record session establishment failures,
successful session establishment, and session termination events to the audit log. Session establishment
failure can occur if invalid or incorrect authentication credentials are submitted.
By default, the TOE is configured to store ten (10) megabytes of data before it will begin to overwrite the
earliest audited events. A Privileged Administrator can modify the maximum local audit log storage to suit
the deployment. The TOE provides the ability to securely transmit audit logs to an external audit server
using TLS. The audit server, (installed with an HTTP command line tool such as Wget or cURL) uses a
script to periodically issue the following command to retrieve audit logs:
https://<TOE_Address>:8082/Eventlog/fetch=0xffffffff. To retrieve the audit logs,
this command must be accompanied with the credentials of an Authorized Administrator or the retrieval
will fail. A copy of the entire Audit Log is sent encrypted using TLS to the audit server where the Audit
Logs contents can be verified and viewed. Retrieving a copy of the audit logs does not delete the audit logs
stored within the TOE. All encryption is provided by CAVP-validated algorithms. Only authenticated
administrator roles have access to the audit logs. No users, including authenticated administrators, have the
ability to modify or delete the audit logs within the TOE. The audit logs are stored in the TOE operating
system and are protected with file permissions from unauthorized access.
TOE Security Functional Requirements Satisfied: FAU_GEN.1, FAU_GEN.2, FAU_STG_EXT.1
7.1.2 Cryptographic Support
Cryptographic operations necessary to support SSH, TLS, HTTPS, encryption, decryption, and key
generation are provided by the CAVP validated Cavium CN501 (AES Cert. #105), CN1610 (AES Cert.
#1265, HMAC Cert. #736), and CN1620 (AES Cert. #1265, HMAC Cert. #736) HACs, and Blue Coat’s
proprietary CAVP validated cryptographic algorithms (AES Cert. #2925, RSA Cert. #1534, SHA Cert.
#2461, DRBG Cert. #539, and HMAC Cert. #1852). The TOE uses SSH, TLS, and HTTPS (via TLS) to
protect communications. SSH provides a trusted path for remote administrators accessing the TOE’s CLI.
TLS is used to provide a trusted channel for ProxySG requests to a Lightweight Directory Access Protocol
(LDAP) server and to BCAAA. TLS is also used to provide a trusted channel during audit log
transmissions from the TOE. HTTPS (via TLS) is used to provide a trusted path for administrator
management connections to the TOE’s Management Console. The TOE uses symmetric AES keys to
encrypt and decrypt data. The TOE also provides HMAC38
-SHA39
and SHS40
to support TOE
cryptographic functionality.
The CAVP validated Cavium CN501 (AES Cert. #105), CN1610 (AES Cert. #1265), and CN1620 (AES
Cert. #1265) HACs are capable of performing encryption and decryption using the AES-128-CBC and
AES-256-CBC algorithms. The CAVP validated Cavium CN1610 (, HMAC Cert. #736) and CN1620 (,
HMAC Cert. #736) are capable of performing Message Authentication Code operations using the HMAC-
SHA-512 algorithm. The TOE’s power-up cryptographic self-tests are also implemented on all the Cavium
HACs. The AES known answer test (KAT) is first tested on the HAC, and if the implementation passes the
test, all cryptographic operations involving AES-128-CBC or AES-256-CBC will be performed on the
HACs. If the AES KAT fails for the Cavium HAC, the HAC is disabled and AES operations take place
exclusively in the software (provided the software implementation self-tests all successfully pass). This
same process repeats for the HMAC KAT; however, HMAC is not implemented on the CN501 Cavium
HAC and therefore this KAT will occur only on the CN1610 and CN1620 for the ProxySG 900 and
ProxySG 9000 respectively. For a complete list and description of the self-tests performed by the TOE,
please see Table 15 below.
38
HMAC – (keyed-) Hashed Message Authentication Code
39
SHA – Secure Hash Algorithm
40
SHS – Secure Hash Standard
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 55 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
The TOE’s cryptographic module is capable of generating cryptographic keys that provide at least 112 bits
of symmetric key strength, in accordance with FIPS standards. Keys are generated via the use of a
CTR_DRBG41
(using AES-256) to provide random keying material. The TOE implements RSA key pair
establishment conformant to section 6.2 of NIST Special Publication 800-56B. The TOE implements RSA
key pair generation that provide at least 112 bits of strength conformant to section 6.3 of NIST Special
Publication 800-56B.
The TOE generates a default key ring (containing a public/private RSA 2048-bit key pair and a certificate
or certificate signing request) when the TOE boots from the uninitialized state. The key ring is used to
secure SSH, TLS, and HTTPS sessions with the Management Console.
The MAK is generated internally using the CAVP validated SP 800-90A CTR_DRBG and stored in the
TOE’s EEPROM in plaintext. The MAK is an AES CBC42
256-bit key that never exits the module and is
overwritten with zeros when the TOE is configured to stop using CAVP validated cryptography. It is used
to encrypt the TOE’s private RSA key, and local authentication passwords.
The TOE can use AES 128, 192, and 256-bit keys when processing HTTPS/TLS requests depending on the
capabilities of the client. When establishing a session, the client and server use the standard TLS
handshake protocol, which involves exchanging the server’s certificate and then the client returning an
encrypted pre-master secret. The client and server then use the pre-master-secret to generate keys known
only to the client and server. These keys are used to encrypt all future messages between the client and
server. HTTPS/TLS is used for management sessions via the Management Console. TLS is used to protect
communications with a remote authentication and the management workstation acting as an audit server.
The TOE supports the following mandatory TLS ciphersuites:
 TLS_RSA_WITH_AES_128_CBC_SHA
 TLS_RSA_WITH_AES_256_CBC_SHA
 TLS_DHE_RSA_WITH_AES_128_CBC_SHA
 TLS_DHE_RSA_WITH_AES_256_CBC_SHA
The TOE also supports the following optional TLS ciphersuites:
 TLS_RSA_WITH_AES_128_CBC_SHA256
 TLS_RSA_WITH_AES_256_CBC_SHA256
The TOE’s cryptographic module is also used when the TOE has been configured to require X.509
certificate-based authentication, such as for environments where CAC43
authentication is used. Under these
circumstances the TOE will implement specially configured CPL during administrator authentication in
order to facilitate TLS mutual authentication. This is accomplished by modifying the HTTPS-Console
service so that it can be configured to validate a client certificate against a chosen certificate authority (CA)
list. X.509 certificate-based authentication will take place against a Certificate realm, and administrator
authorization takes place against a local or configured LDAP realm.
The X.509 certificate-based authentication process is as follows:
1. The administrator opens a browser and establishes a clear-text HTTP connection with the TOE.
2. Using CPL similar to the VPM NotifyUser action, the administrator is presented with a DoD
warning banner which they must positively acknowledge and accept.
3. NotifyUser redirects the administrator’s browser to an HTTPS connection with the TOE that
requires mutual authentication. This is made possible by CPL that puts the TOE in reverse-proxy
mode at this point.
41
DRBG –Deterministic Random Bit Generator
42
CBC – Cipher Block Chaining
43
CAC Authentication was not tested; only X.509 certificate-based authentication was tested in the CC Evaluated
Configuration.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 56 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
4. The TLS handshakes begin. The reverse-proxy service on the TOE requires a certificate to
complete the handshake (i.e. the verify-peer setting has been enabled in the reverse-proxy
service).
5. The administrator’s browser presents the administrator with a dialog box prompting the
administrator to select a certificate.
6. The administrator selects the X.509 certificate.
7. The TOE authenticates the X.509 certificate against the CA list that has been configured on the
reverse proxy service using local CRLs and OCSP to check for certificate revocation.
8. The administrator reviews and accepts the certificate issued to the web browser by the TOE. A
mutually authenticated TLS session is now in use.
9. The TOE extracts the user’s subject name from the subjectAltNames extension of the X.509
certificate according to configuration of the certificate realms. Within the subjectAltNames
extension is the user’s userPrincipleName (UPN) or CommonName (CN) field. The
UPN/CN is extracted from the certificate and is checked against the Principle Name (PN) field of
a user record in Active Directory (AD), the LDAP server.
10. The certificate realm is configured to use an LDAP realm for authorization. The LDAP user is
determined by LDAP search using the following filter:
(userPrincipleName=$(user.name)).
The administrator is granted access to the Management Console if the UPN/CN is found in the LDAP
directory. The exchanges with the LDAP server are secured using TLS. Conditions like group= and
ldap.attribute <name> may also be used to authorize the user and to specify if the user should
have read-only or read-write access.
The TOE uses the open source OpenSSH implementation of the SSHv2 protocol which conforms to RFCs
4251, 4252, 4253, and 4254 as shown here: http://www.openssh.org/specs.html. The TOE supports the use
of the RSA public key algorithm (SSH_RSA) and password-based mechanisms for authentication over
SSH. The TOE detects large SSH packets by examining the header information for incoming packets. If
the packet is an SSH packet, and the packet size is greater than 256 kilobytes, then the packet is dropped.
SSH traffic can be encrypted with AES-CBC-128 and AES-CBC-256. For data integrity during SSH
sessions, HMAC-SHA1 and HMAC-SHA1-96 are available. Diffie-Hellman-group14-SHA1 is the only
allowed key exchange method used for the SSH protocol.
The TOE provides zeroization techniques for all plaintext and private keys. TLS and SSH session keys
reside in volatile memory only and never stored persistently. The contents of volatile memory are lost
immediately when power is removed or the TOE is restarted; therefore, TLS and SSH session keys are
considered zeroized when the TOE is restarted or shutdown. The private RSA key and local authentication
passwords are all persistent while the module is operating in the evaluated configuration. These CSPs
(which are stored encrypted with the MAK) can be zeroized by disabling the TOE’s use of CAVP validated
cryptography. Additionally, when the TOE is configured to discontinue use of the CAVP validated
cryptography, the memory location in EEPROM where the MAK resides is overwritten with zeros,
effectively making any keys or passwords encrypted with the MAK permanently inaccessible.
TOE Security Functional Requirements Satisfied: FCS_CKM.1, FCS_CKM_EXT.4,
FCS_DRBG_EXT.1, FCS_HTTPS_EXT.1, FCS_TLS_EXT.1, FCS_SSH_EXT.1.
7.1.3 User Data Protection
The TOE enforces the User Data Protection TSF on user data by ensuring that only the size of incoming
packet’s buffer area is used for the outgoing packet’s buffer area, ensuring any residual data in the buffer
area used by previous network packets is made unavailable (through overwriting or exclusion) during
buffer allocation for the outgoing packet. When a network packet is received by the TOE, the TOE’s
Network Interface Card (NIC) writes the packet’s contents into memory buffers that are used for network
packet processing. The contents of the memory buffers will be overwritten with the contents of the
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 57 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
received packet, ensuring any user data that was previously present, is no longer available in the memory
buffer for intentional or unintentional reuse. During the allocation of the memory buffer, because the
memory buffers may be larger than received packet, the TOE uses the incoming packet size to track what it
considers ‘good’ data. If a larger packet is received followed by a smaller packet, the TOE will update
what it considers ‘good’ data to match the size of the received smaller packet. When the packet is sent out,
the NIC reads directly from the memory buffer and only reads up to the ‘good’ data size ensuring that any
data from the previous larger packet will not find its way into a new packet. This guarantees that there is
no possibility for residual data from the memory buffer’s previous contents to find its way into a new
packet.
TOE Security Functional Requirements Satisfied: FDP_RIP.2.
7.1.4 Identification and Authentication
The TOE provides mechanisms for authenticating administrators connecting to the TOE through the CLI
and Management Console. When an administrator connects through the Management Console, the TOE
must authenticate them. The TOE will consult the internal authentication mechanism in place to
authenticate the administrator. The TOE can authenticate administrators through the Management Console
using a Certificate realm (which uses locally configured X.509 certificates for authentication, and also
using LDAP over TLS), an IWA-BCAAA realm (which uses BCAAA for authentication against a remote
Windows Active Directory), an LDAP realm (which uses an external LDAP server for authentication), and
the Local realm (which uses locally stored username and password combinations for authentication). The
TOE can locally authenticate administrators through the CLI over SSH using a username and password
combination (via the predefined ‘admin’ account or the Local realm), the IWA-BCAAA realm, the LDAP
realm, and a localized RSA keypair. The TOE can locally authenticate administrators through the serial
console using the predefined ‘admin’ account only.
The authentication mechanism used by the TOE for administrator authentication can only be modified by
another administrator through CPL. Using CPL, an authorised administrator can craft policies controlling
administrative access by users (excluding administrators authenticating with the ‘admin’ account
credentials, which are not subject to crafted CPL). This allows administrative access to be granted or
denied based on the username, the groups to which the user belongs, and the time of day.
If authentication via Certificate realm or IWA-BCAAA realm fails, or if CPL has not been configured to
perform such an authentication for administrators, then the TOE will prompt for a username and a
password to be used against the Local realm.
The TOE can be configured to support X.509 certificate-based authentication; this type of configuration
would be required if the TOE was deployed in a CAC enabled environment; however CAC was not tested.
Please refer to section 7.1.2 for a detailed description on X.509 certificate-based authentication.
Administrator authentication is enforced through the use of a password, X.509 certificate, or an RSA key.
Authorized administrators can configure the password to be at least a minimum password length of fifteen
(15) characters. Valid passwords can be composed of any combination of upper and lower case letters,
numbers, and the following special characters: !, @, #, $, %, ^, <, &, *, (, ), comma (,), quotation mark (“),
underscore (_), tab (\t), and space ( ). All accounts on the TOE, including the ‘admin’ account, are subject
to the configured password policy.
All forms of authentication for the CLI and Management Console are secured using a trusted path or trusted
channel depending on the authentication mechanism in use. The CLI only accepts credentials via a serial
connection or an SSH session. The Management Console interface only accepts credentials via HTTPS
(over TLS). When administrator authentication is configured to use an IWA-BCAAA Realm or an LDAP
realm that is external to the TOE, the connection used to transmit the authentication credentials is secured
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 58 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
using TLS to the external authentication server (the LDAP server or Microsoft AD Domain Controller
where the BCAAA is installed).
A login is considered successful if the credentials submitted by the administrator can be validated by the
TOE. If authentication using username and password credentials is used, and the credentials match a
locally stored username and password, or authentication via the IWA-BCAAA realm or the LDAP realm
succeeds, login is considered successful. If the Certificate realm is used for authentication, the TOE must
first verify the submitted X.509 certificate is signed by an explicitly trusted Certificate Authority and that
the client possesses the private key that corresponds with the public key in the submitted X.509 certificate.
The TOE will encrypt a message using the public key and send it to the client attempting authentication.
The client will use its private key to decrypt the TOE’s encrypted message. The TOE receives the client’s
response which should contain the decrypted message. If the TOE is able to verify the decrypted message,
login is considered successful. Administrators are notified by the CLI and Management Console when
there is a failure in authentication and they will be prompted to try again.
TOE Security Functional Requirements Satisfied: FIA_PMG_EXT.1, FIA_UIA_EXT.1,
FIA_UAU_EXT.2, FIA_UAU.7.
7.1.5 Security Management
Security management specifies how the TOE manages several aspects of the TSF including TSF data and
security functions. TSF data includes configuration data of the TSF and audit data, cryptographic
functionality and information, hosts, dashboards and analytics, and administrator accounts. The TOE
provides authorized administrators with the Management Console to easily manage the security functions
and TSF data of the TOE. The Management Console can be used to configure the cryptographic
functionality available on the TOE, update the TOE, and verify the updates via digital signatures. The
same functionality is available to administrators over the CLI as well.
The TOE defines two Administrator roles:
1. Standard or Unprivileged mode Administrator – has not been granted access to the “enabled” mode in
the CLI and has been given “read-only” privileges when using the Management Console. The
Standard or Unprivileged mode Administrator will access the CLI and Management Console interfaces
for management of the module; however, the Administrator cannot make any changes to configuration
settings. When the Standard or Unprivileged mode Administrator is administering the module over
the Management Console, they perform all the same services available in CLI (“standard” mode only
services) and additionally, can query the TOE to determine if CAVP validated cryptography is in use
in the Management Console only.
2. Enabled, or Privileged mode Administrator – has been granted “enabled” mode access while using the
CLI and “read/write” access while using the Management Console. When the Enabled, or Privileged
mode Administrator is using the CLI, and while in the “enabled” mode of operation, Enabled, or
Privileged mode Administrators may configure the TOE’s use of CAVP validated cryptography (local
serial port only) and query if the TOE is configured to CAVP validated cryptography. In addition, this
role may do all the services available to Standard Administrators while not in “enabled” mode. Once
the Administrator has entered the “enabled” mode, the Enabled, or Privileged mode Administrator
may then enter the Configuration mode via the CLI. The configuration mode provides the
Administrator management capabilities to perform tasks such as account Management Console, they
can perform all the same services available in CLI (equivalent to being in the Configuration mode in
the CLI) except the Enabled, or privileged mode Administrator is unable to configure the TOE to use
CAVP validated cryptography.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 59 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Unauthenticated users only have access to read the displayed warning banner before authenticating
successfully with the TOE and establish a secure SSH or TLS session with the TOE. While the TOE
access banner is displayed to all Users before authentication, it is read-only and cannot be modified by an
unauthenticated User (and in fact is not modifiable from the login screen at all). The secure SSH or TLS
session only provides access for the unauthenticated Administrator to authenticate and there are no other
services for unauthenticated users.
TOE Security Functional Requirements Satisfied: FMT_MTD.1, FMT_SMF.1, FMT_SMR.2.
7.1.6 Protection of the TSF
The TOE provides SSH, TLS, and HTTPS/TLS to protect TSF data from disclosure and to detect
modification of TSF data while in transit between different parts of the TOE.
The TOE does not allow any Administrator to read plaintext passwords stored on the TOE, since all
passwords are stored in encrypted form using an AES-256-bit key. The TOE also prevents symmetric and
private keys from being read by storing keys in encrypted form using an AES-256-bit key. The encrypting
AES-256-bit key is stored in internally-allocated data structure. The TOE’s SGOS safeguards memory and
process space from unauthorized access. Because there is no direct access to memory, and passwords,
private keys, and other CSPs are stored in encrypted form, there is no potential for an all-powerful
Administrator to directly read plaintext CSPs from memory.
The TOE generates its own time stamps that originate from a system hardware clock. The time stamps are
considered reliable because the TOE has successfully completed its bootup and initialization process,
indicating that all hardware is functioning properly. Had there be a failure with the hardware clock, the
TOE would not have completed its bootup cycle. Additionally, once operational, the time stamps are
reliable because only an Authorized Administrator is capable of modifying the clock. Because the
Authorized Administrator is trusted to follow and apply all administrator guidance while administering the
TOE, the time stamps are reliable and will not be maliciously changed.
The timestamp is used by the audit logs to record an accurate time for each auditable event and must be set
to the current Coordinated Universal Time (UTC). The clock can be changed through the CLI and
Management Console. Using the Management Console, an authorized Administrator may edit the time by
navigating to the Configuration > General > Clock >Clock tab page. Only Authorized Administrators
may edit the time and the value of the timestamps is reliable. Use of an NTP server is not part of the
evaluated configuration. Administrators using the CLI may also edit the time by entering the enabled
mode, followed by the configuration mode and using the “clock” command and correct parameters.
Administrators can find the current version of TOE software by going to the home page of the Management
Console or using the show version command through the CLI. The TOE also provides a feature to
update the TOE software. When a TOE software upgrade is initiated by an administrator, an integrity test
public key (RSA 2048-bit public key) is used to verify the digital signature of the new TOE software before
it is installed. The integrity test public key resides on the TOE’s hard disk. Failure to verify the integrity of
the downloaded TOE software will result in an error and the administrator will be unable to proceed with
the upgrade. Candidate updates are downloaded from Blue Coat’s website
(https://bto.bluecoat.com/download), which is the authorized source that signs these images. Access to the
images requires an account with the site. All images are digitally signed by Blue Coat so they can be
verified during the upgrade process.
At power up, the TOE runs a suite of self-tests that check for the correct operation of the cryptographic
functionality provided by the TOE. All TOE appliances run these tests on startup. The TOE first performs
an integrity test on the TOE software, guaranteeing that there have been no modifications, malicious or
otherwise, to the TOE software. The TOE contains both a software implementation of its cryptographic
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 60 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
algorithms and a HAC that contains a subset (only AES and HMAC) of the cryptographic algorithms. The
TOE first verifies correct operation of the software implementation, and then tests the HAC for its
cryptographic functionality.
The TOE proceeds to test its software implementation of cryptographic functionality (using the tests in
Table 15 below) through a series of known answer tests (KATs) and pairwise consistency tests, which
exercise and verify the operation of the TOE’s cryptographic services. Successfully completing the KATs
and pairwise consistency tests provides evidence that the TOE is operating correctly. Any errors
encountered during the software implementation self-tests will cause the TOE to enter a critical error state
and require administrator intervention. After successful completion of the software self-tests, the HAC
self-tests are executed (using the tests in Table 15 below marked with ‘HAC’). If the HAC self-tests pass,
the TOE will use the HAC for cryptographic services; if the HAC self-tests fail, a message stating
“Hardware Crypto Accelerator failed FIPS self-tests: disabled” is logged to the audit log and the HAC is
disabled. If the HAC is disabled, the TOE continues to operate securely and will use the software
implementation exclusively. Therefore, successfully passing the startup self-tests is sufficient to show that
the TSF is operating correctly and that no errors resulted from the tests.
A description of each self-test is given in Table 15 below.
Table 15 Self-Test Descriptions
Self-Test Description
AES KAT(software) The KAT encrypts a known plaintext with known keys. It then compares the
resultant ciphertext with the expected ciphertext hard-coded in the TOE. If
the two values differ, then the KAT fails. If the two values agree, the AES KAT
then decrypts the ciphertext with the known keys and compares the decrypted
text with the known plaintext. If they differ, then the test fails. If they are the
same, then the test passes.
RSA Digital Signature
Generation and
Verification KAT
The private key is used to sign a block of data, and the resultant value is
compared with the original data. If they are the same, the test fails. If they
differ, then the public key is used to verify the ciphertext, and the output is
compared to the original data. If they are the same, the test passes.
Otherwise, it is failed.
RSA Pair-wise
Consistency Test
The RSA pair-wise consistency test for key wrapping uses an RSA private key to
wrap the hash of some data. The resulting wrapped data is compared to the
original hashed data before it was wrapped. If the two values are equal, then
the test has failed. If the two values differ, the public key is used to unwrap the
hashed data and the resulting value is compared to the original hashed data. If
the two values are not equal, the test has failed.
SHA-1 KAT The KAT takes a specific value and hashes it. This digest value is then
compared to the known value. If the values differ, the test fails. If they are the
same, the test passes.
SHA-224 KAT The KAT takes a specific value and hashes it. This digest value is then
compared to the known value. If the values differ, the test fails. If they are the
same, the test passes.
SHA-256 KAT The KAT takes a specific value and hashes it. This digest value is then
compared to the known value. If the values differ, the test fails. If they are the
same, the test passes.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 61 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Self-Test Description
SHA-384 KAT The KAT takes a specific value and hashes it. This digest value is then
compared to the known value. If the values differ, the test fails. If they are the
same, the test passes.
SHA-512 KAT The KAT takes a specific value and hashes it. This digest value is then
compared to the known value. If the values differ, the test fails. If they are the
same, the test passes.
HMAC SHA-1 KAT
(software)
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-224 KAT
(software)
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-256 KAT
(software)
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-384 KAT
(software)
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-512 KAT
(software)
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
CTR_DRBG Self-Test A known seed value is used to initialize the DRBG. A block of random data is
then generated and compared to a pre-generated value. If these values are the
same, the test is passed. Otherwise, the test is failed.
AES KAT (HAC)
Present on all TOE
hardware models
The KAT encrypts a known plaintext with known keys. It then compares the
resultant ciphertext with the expected ciphertext hard-coded in the TOE. If
the two values differ, then the KAT fails. If the two values agree, the AES KAT
then decrypts the ciphertext with the known keys and compares the decrypted
text with the known plaintext. If they differ, then the test fails. If they are the
same, then the test passes.
If this test passes, AES operations will be performed by the Cavium HACs. If
this test fails, the software implementation will be relied upon to provide AES
encryption and decryption operations.
HMAC SHA-1 KAT
(HAC)
Present only on the
ProxySG SG900 and
SG9000
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-224 KAT
(HAC)
Present only on the
ProxySG SG900 and
SG9000
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-256 KAT The KAT creates a MAC using a known message and known key. This MAC
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 62 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Self-Test Description
(HAC)
Present only on the
ProxySG SG900 and
SG9000
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-384 KAT
(HAC)
Present only on the
ProxySG SG900 and
SG9000
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
HMAC SHA-512 KAT
(HAC)
Present only on the
ProxySG SG900 and
SG9000
The KAT creates a MAC using a known message and known key. This MAC
value is then compared to the expected MAC value. If the values differ, the test
fails. If they are the same, the test passes.
TOE Security Functional Requirements Satisfied: FPT_APW_EXT.1, FPT_SKP_EXT.1, FPT_STM.1,
FPT_TST_EXT.1, FPT_TUD_EXT.1.
7.1.7 TOE Access
The TOE terminates local and remote management sessions after an Administrator configurable time
period of inactivity has elapsed. Local sessions must be initiated by accessing the CLI via the serial port.
Remote sessions may be initiated by accessing the CLI using SSH or accessing the Management Console
using HTTPS via TLS. Administrators may also terminate their sessions voluntarily. Users must log in
again to regain access to TOE management capabilities. At the login screen Administrators are shown an
advisory notice and consent warning message regarding unauthorized use of the TOE. The message is
shown to users of both the Management Console and the CLI.
TOE Security Functional Requirements Satisfied: FTA_SSL.3, FTA_SSL.4, FTA_SSL_EXT.1,
FTA_TAB.1.
7.1.8 Trusted Path/Channels
The TOE provides a trusted path between the TOE management interfaces and remote TOE administrators.
These interfaces are the CLI over SSH and the Management Console over HTTPS. The protocols and the
cryptography implemented by the TOE provide adequate defense against unauthorized disclosure and
provide for the detection of modification of TSF data while it is being communicated.
Additionally, the TOE provides a trusted channel between the TOE and the trusted IT entities used for the
audit and authentication servers. The TOE protects audit log traffic by encrypting it with a secure TLS
tunnel. For authentication mechanisms that require the use of LDAP or the BCAAA, the communication
between the TOE and the authentication server is also protected with TLS. The TLS channel prevents
unauthorized disclosure and detection of modification for all audit and authentication data sent to the
Administrator’s management workstation and authentication server respectively.
The TOE does not communicate with any other servers or network devices in the evaluated configuration.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 63 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
TOE Security Functional Requirements Satisfied: FTP_ITC.1, FTP_TRP.1.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 64 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
8 Rationale
8.1 Conformance Claims Rationale
This Security Target conforms to Part 2 extended and Part 3 conformant of the Common Criteria Standard
for Information Technology Security Evaluations, Version 3.1 Revision 4. This ST conforms to the NDPP.
8.1.1 Variance Between the PP and this ST
In some instances changes were made in this ST from the NDPP. All of these changes are documented
below with a rationale for the change.
 An Application Note in the NDPP states that the word “manage” in FMT_MTD.1 is the default
requirement for management of TSF data. Other iterations are possible. A table was added to
FMT_MTD.1 to include the operations listed in the Application Note for manage and any other
operations administrators in the TOE can perform.
8.1.2 Security Assurance Requirements Rationale
This ST maintains exact conformance to NDPP, including the assurance requirements listed in section 4.3
of NDPP.
8.1.3 Dependency Rationale
This ST does satisfy all the requirement dependencies of the Common Criteria. Table 16 lists each
requirement to which the TOE claims conformance with a dependency and indicates whether the dependent
requirement was included. As Table 16 below indicates, all dependencies have been met.
Table 16 Functional Requirements Dependencies
SFR ID Dependencies Dependency
Met
Rationale
FAU_GEN.1 FPT_STM.1 
FAU_GEN.2 FIA_UID.1  Although FIA_UID.1 is
not included,
FIA_UIA_EXT.1 provides
coverage for user
identification and
authentication which
supersedes FIA_UID.1.
FAU_GEN.1 
FAU_STG_EXT.1 FAU_GEN.1 
FCS_CKM.1 FCS_COP.1(3) 
FCS_COP.1(4) 
FCS_COP.1(1) 
FCS_COP.1(2) 
FCS_CKM.4  Although FCS_CKM.4 is
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 65 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
SFR ID Dependencies Dependency
Met
Rationale
not in the ST,
FCS_CKM_EXT.4
provides coverage.
FCS_CKM_EXT.4 FCS_CKM.1 
FCS_COP.1(1) FCS_CKM.1 
FCS_CKM.4  Although FCS_CKM.4 is
not in the ST,
FCS_CKM_EXT.4
provides coverage.
FCS_COP.1(2) FCS_CKM.4  Although FCS_CKM.4 is
not in the ST,
FCS_CKM_EXT.4
provides coverage.
FCS_CKM.1 
FCS_COP.1(3) FCS_CKM.1 
FCS_CKM.4  Although FCS_CKM.4 is
not in the ST,
FCS_CKM_EXT.4
provides coverage.
FCS_COP.1(4) FCS_CKM.4  Although FCS_CKM.4 is
not in the ST,
FCS_CKM_EXT.4
provides coverage.
FCS_CKM.1 
FCS_HTTPS_EXT.1 FCS_TLS_EXT.1 
FCS_RBG_EXT.1 No dependencies 
FCS_SSH_EXT.1 FCS_COP.1(1) 
FCS_TLS_EXT.1 FCS_COP.1(1) 
FDP_RIP.2 No dependencies 
FIA_PMG_EXT.1 No dependencies 
FIA_UAU.7 FIA_UAU.1  Although FIA_UAU.1 is
not included,
FIA_UIA_EXT.1
provides coverage for
user identification and
authentication which
supersedes FIA_UAU.1.
FIA_UAU_EXT.2 No dependencies 
FIA_UIA_EXT.1 FTA_TAB.1 
FMT_MTD.1 FMT_SMF.1 
FMT_SMR.1 
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 66 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
SFR ID Dependencies Dependency
Met
Rationale
FMT_SMF.1 FPT_TUD_EXT.1 
FCS_COP.1(2) 
FIA_UIA_EXT.1 
FMT_SMR.2 FIA_UID.1  Although FIA_UID.1 is
not included,
FIA_UIA_EXT.1 provides
coverage for user
identification and
authentication which
supersedes FIA_UID.1.
FPT_APW_EXT.1 No dependencies 
FPT_SKP_EXT.1 No dependencies 
FPT_STM.1 No dependencies 
FPT_TST_EXT.1 No dependencies 
FPT_TUD_EXT.1 FCS_COP.1(2) 
FTA_SSL.3 No dependencies 
FTA_SSL.4 No dependencies 
FTA_SSL_EXT.1 FIA_UAU.1  Although FIA_UAU.1 is
not included,
FIA_UIA_EXT.1 provides
coverage for user
identification and
authentication which
supersedes FIA_UAU.1.
FTA_TAB.1 No dependencies 
FTP_ITC.1 FCS_HTTPS_EXT.1 
FCS_TLS_EXT.1 
FTP_TRP.1 FCS_SSH_EXT.1 
FCS_TLS_EXT.1 
FCS_HTTPS_EXT.1 
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 67 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
9 Acronyms and Terms
This section describes the acronyms and terms.
9.1 Terminology
Table 17 Terms
Name Definition
Authorized
Administrator
A user with administrator TOE access that has been successfully identified and
authenticated by the TOE. Can be either a Standard or Privileged mode Administrator.
Target network The domain of network and managed devices to be analyzed by the TOE.
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 68 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
9.2 Acronyms
Table 18 Acronyms
Acronym Definition
ADN Application Delivery Network
AES Advanced Encryption Standard
ANSI American National Standards Institute
AOL America Online
BCAAA Blue Coat System Authentication and Authorization Agent
CA Certificate Authority
CAC Common Access Card
CBC Cipher Block Chaining
CC Common Criteria
CEM Common Criteria Evaluation Methodology
CFB Cipher Feedback
CIFS Common Internet File System
CLI Command Line Interface
CM Configuration Management
CPL Content Policy Language
CRL Certificate Revocation List
CTR Counter mode
DNS Domain Name System
DoD United States Department of Defence
DRBG Deterministic Random Bit Generator
DSA Digital Signature Algorithm
EAL Evaluation Assurance Level
ECB Electronic Codebook
FIPS Federal Information Processing Standard
FSP Functional Specification
FTP File Transfer Protocol
GB Gigabyte
GigE Gigabit Ethernet
HMAC (keyed) Hashed Message Authentication Code
HSPD Homeland Security Presidential Directive
HTML Hypertext Markup Language
HTTP Hypertext Transfer Protocol
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 69 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Acronym Definition
HTTPS Secure Hypertext Transfer Protocol
ICC Integrated Circuit Card
IMAP Internet Message Access Protocol
IP Internet Protocol
IT Information Technology
IWA Integrated Windows Authentication
KAT Known Answer Test
LAN Local Area Network
LDAP Lightweight Directory Access Protocol
MAC Message Authentication Code
MAK Master Appliance Key
MAPI Messaging Application Programming Interface
MIME Multipurpose Internet Mail Extensions
MMS Microsoft Media Streaming
MSN The Microsoft Network
NCSA National Center for Supercomputing Applications
NDPP
Security Requirements for Network Devices v1.1 Protection
Profile
NIC Network Interface Card
NTP Network Time Protocol
OCS Original Content Server
OFB Output Feedback
OS Operating System
OSP Organizational Security Policy
PCI-e Peripheral Controller Interconnect –Express
PIN Personal Identification Number
POP3 Post Office Protocol version 3
PP Protection Profile
RBG Random Bit Generation
RFC Request For Comments
RNG Random Number Generator
RSA Rivest, Shamir, and Adelman
RTSP Real-Time Streaming Protocol
SAR Security Assurance Requirement
SAS Serial Attached SCSI
Security Target, Version 1.3 September 18, 2014
Blue Coat ProxySG SG600, SG900, and SG9000 running SGOS v6.5 Page 70 of 71
© 2014 Blue Coat Systems, Inc.
This document may be freely reproduced and distributed whole and intact including this copyright notice.
Acronym Definition
SATA Serial Advanced Technology Attachment
SCSI Small Computer System Interface
SFP Security Functional Policy
SFR Security Functional Requirement
SGOS Secure Gateway Operating System
SHA Secure Hash Algorithm
SHS Secure Hash Standard
SMTP Simple Mail Transfer Protocol
SOCKS SOCKet Secure
SP Special Publication
SSH Secure Shell
SSL Secure Sockets Layer
ST Security Target
TCP Transmission Control Protocol
TB Terabyte
TLS Transport Layer Security
TOE Target of Evaluation
TSF TOE Security Function
TSFI TOE Security Functional Interface
U Unit
UTC Coordinated Universal Time
URL Uniform Resource Locator
VPM Visual Policy Manager
WAN Wide Area Network
Prepared by:
Corsec Security, Inc.
13135 Lee Jackson Memorial Highway
Suite 220
Fairfax, VA 22033
United States of America
Phone: +1 703 267 6050
Email: info@corsec.com
http://www.corsec.com