Hitachi Unified Storage110
Microprogram
Security Target
Revision 1.2
September 25, 2013
This document is a translation of the evaluated and
certified security target written in Japanese.
Contets i
Contents
1 ST overview ..............................................................................................................................1
1.1 ST identification .................................................................................................................1
1.2 TOE identification...............................................................................................................1
1.3 TOE description .................................................................................................................1
1.3.1 TOE type .....................................................................................................................1
1.3.2 TOE use and key security features .............................................................................1
1.3.3 Hardware/software/firmware other than TOE ..............................................................5
1.4 TOE description .................................................................................................................7
1.4.1 TOE and its IT environment.........................................................................................7
1.4.2 Physical boundaries ....................................................................................................9
Hitachi Unified Storage 100 ISO/IEC15408 Certified Functions Guide ................................... 10
1.4.3 Logical boundaries .................................................................................................... 10
2 Conformance claims................................................................................................................ 12
2.1 CC conformance claims ................................................................................................... 12
2.2 PP claims ......................................................................................................................... 12
2.3 Package claims ................................................................................................................ 12
2.4 Rationale.......................................................................................................................... 12
3 Security problem definition...................................................................................................... 13
3.1 Assets .............................................................................................................................. 13
3.2 Threats ............................................................................................................................. 13
3.3 Organizational security policies........................................................................................ 13
3.4 Assumptions..................................................................................................................... 15
4 Security objectives .................................................................................................................. 16
4.1 Security Objectives for the TOE ....................................................................................... 16
4.2 Security objectives for the operational environment......................................................... 17
4.3 Security objectives rationale ............................................................................................ 18
4.3.1 Tracing between security problem definition and security objectives ........................ 19
4.3.2 Security objectives rationale ..................................................................................... 19
5 Extended components definition ............................................................................................. 21
6 Security requirements ............................................................................................................. 22
6.1 Security functional requirements ...................................................................................... 22
6.1.1 FAU_GEN.1 Audit data generation............................................................................ 23
6.1.2 FAU_GEN.2 User identity association....................................................................... 23
6.1.3 FAU_SAR.1 Audit review........................................................................................... 24
6.1.4 FAU_SAR.2 Restricted audit review.......................................................................... 24
6.1.5 FAU_STG.1 Protected audit trail storage .................................................................. 24
6.1.6 FAU_STG.4 Prevention of audit data loss ................................................................. 24
6.1.7 FDP_ACC.1 Subset access control........................................................................... 25
6.1.8 FDP_ACF.1 Security attribute based access control................................................. 25
6.1.9 FIA_ATD.1 User attribute definition........................................................................... 26
6.1.10 FIA_SOS.1 Verification of secrets ............................................................................. 26
6.1.11 FIA_UAU.1 Timing of authentication ......................................................................... 26
6.1.12 FIA_UAU.2 User authentication before any action .................................................... 27
6.1.13 FIA_UAU.5 Multiple authentication mechanisms....................................................... 27
Contets ii
6.1.14 FIA_UID.1 Timing of identification............................................................................. 28
6.1.15 FIA_UID.2 User identification before any action ....................................................... 28
6.1.16 FIA_USB.1 User-subject binding............................................................................... 28
6.1.17 FMT_MOF.1 Management of security functions behavior ......................................... 29
6.1.18 FMT_MSA.1 Management of security attributes ....................................................... 29
6.1.19 FMT_MSA.3 Static attribute initialization .................................................................. 29
6.1.20 FMT_MTD.1 Management of TSF data .....................................................................30
6.1.21 FMT_REV.1 Revocation............................................................................................ 30
6.1.22 FMT_SMF.1 Specification of Management Functions ............................................... 31
6.1.23 FMT_SMR.1 Security roles ....................................................................................... 31
6.1.24 FPT_STM.1 Reliable time stamps ............................................................................. 32
6.1.25 FRU_RSA.1 Maximum quotas................................................................................... 32
6.1.26 FTA_SSL.3 TSF-initiated termination ........................................................................ 32
6.2 Security assurance requirements ..................................................................................... 32
6.3 Security requirement rationale ......................................................................................... 33
6.3.1 Security functional requirements rationale ................................................................ 33
6.3.2 Security assurance requirements rationale ............................................................... 36
7 TOE summary specification..................................................................................................... 38
7.1 Summary of measures for security functional requirements.............................................38
7.1.1 FAU_GEN.1/FAU_GEN.2 .......................................................................................... 38
7.1.2 FAU_SAR.1/FAU_SAR.2 ........................................................................................... 38
7.1.3 FAU_STG.1/FAU_STG.4............................................................................................ 39
7.1.4 FDP_ACC.1/FDP_ACF.1 ........................................................................................... 39
7.1.5 FIA_ATD.1................................................................................................................. 39
7.1.6 FIA_SOS.1 ................................................................................................................ 40
7.1.7 FIA_UAU.1/FIA_UAU.2/FIA_UAU.5/FIA_UID.1/FIA_UID.2 ....................................... 40
7.1.8 FIA_USB.1 ................................................................................................................ 40
7.1.9 FMT_MOF.1 .............................................................................................................. 41
7.1.10 FMT_MSA.1 .............................................................................................................. 41
7.1.11 FMT_MSA.3 .............................................................................................................. 41
7.1.12 FMT_MTD.1 .............................................................................................................. 41
7.1.13 FMT_REV.1 ............................................................................................................... 42
7.1.14 FMT_SMF.1............................................................................................................... 42
7.1.15 FMT_SMR.1 .............................................................................................................. 42
7.1.16 FPT_STM.1 ............................................................................................................... 43
7.1.17 FRU_RSA.1............................................................................................................... 43
7.1.18 FTA_SSL.3 ................................................................................................................ 43
8 Terms and definitions .............................................................................................................. 44
8.1 CC-related........................................................................................................................ 44
8.2 TOE-related...................................................................................................................... 44
1
1 ST overview
1.1 ST identification
Title: Hitachi Unified Storage 110 Microprogram Security Target
Revision: 1.2
Issued on: September 25, 2013
Prepared by: Hitachi, Ltd.
Keywords: disk array, shared disk array, storage, SAN
1.2 TOE identification
TOE identification: Hitachi Unified Storage110 Microprogram
Version: 0917/A
Developed by: Hitachi, Ltd.
1.3 TOE description
1.3.1 TOE type
This TOE is a control program (software) operating in the disk array subsystem. The disk
array subsystem means Hitachi Unified Storage 110, developed by Hitachi, Ltd. This disk
array subsystem is henceforth called HUS. The TOE constitutes a part of HUS and
controls access to its storage areas from multiple host computers connected. HUS is a
product family, and its variants are distinguished by digits accompanying the product
name. In this ST, HUS means the specific product that is followed by the digits “110”.
1.3.2 TOE use and key security features
(1) TOE use and configuration
[HUS Description]
TOE is software that constitutes HUS. First, description of HUS that includes the TOE is
described here.
HUS is a storage product of disk array subsystem for the midrange, provided by Hitachi,
Ltd. Satisfying the customers' requirements, scalable disk array subsystem can be
configured, with up to 960 drives mounted (one drive can accommodate 3TB) in the top-
end configuration. To address multiple failures of disk drives, it supports redundant
2
configuration using RAID (RAID0/RAID1/RAID1+0/RAID5/RAID6), however, features
related to the RAID configuration are not included in TOE security features.
Figure 1-1 shows an IT environment configuration where HUS is used. TOE is software
stored in the HUS; not shown in the figure.
Figure 1-1 HUS and IT environment
HUS is connected with multiple host computers via a dedicated network and serves as
high-capacity disk array subsystem that supports RAID configuration. It is assumed that
host computers, HUS, and dedicated network that interconnect them are used in a
physically and logically access-controlled secure environment.
FC-SAN and IP-SAN are available for a dedicated network. FC-SAN (Fibre Channel
Storage Area Network) utilizes optical fiber cable and IP-SAN (IP Storage Area
Network) uses SCSI protocol on IP network such as Ethernet.
HUS has 8 to 16 connecting ports for dedicated network. Multiple host computers can be
connected to each port in both FC-SAN and IP-SAN. Users are encouraged to select the
appropriate network configuration for its use because the number of host computers
connectable to the network and the amount of data transmission capacity differs
depending on the type of network.
Physically access-controlled area
・・・
・・・
・・・
・・・
Host computers
(Dedicated network
HUS
Management
console
LAN
Syslog server
Management console
3
In FC-SAN, one port accommodates up to 128 host groups and one host group
accommodates up to 128 host computers (accurately, network interfaces). Host group
means a group that consists of multiple host computers running on the same OS. In IP-
SAN, one port accommodates up to 255 host computers. These figures are theoretical
maximum value, not guaranteeing the number of devices that can be used simultaneously.
Regardless of the type of network, appropriate network must be configured considering
transmission rate and data transmission amount required for host computers. The
guidance that comes with HUS discusses the details.
Host computers that use HUS are not limited to any specific models or types. HUS can
accommodate host computers running on the various OSs including Windows, HP-UX,
and Solaris.
Each host computer is assigned a dedicated storage area in the disk array. This storage
area is a logical storage area that is configured in the physical disk array and recognized
as one volume by host computers. Logical storage area assigned to one host computer is
logically separated from storage areas of other host computers, preventing mutual
interference. Host computers cannot access storage areas other than those assigned. FC-
SAN and IP-SAN are respectively evaluated by the configuration that uses 2 host
computers.
In Figure 1-1, management console is connected with HUS via the LAN. The LAN is
configured with Ethernet and used within a physically and logically access-controlled
area. In the figure, only one HUS is used as disk array subsystem, however, multiple disk
array subsystems and other peripheral devices share the LAN in an actual operational
environment. Also not shown in the figure are servers that may be connected, commonly
managing audit log data of HUS and other devices etc. These devices are not users of the
TOE, not affecting the TOE security features.
HUS provides the interface for maintenance personnel (not shown in Figure 1-1).
Maintenance personnel play role of maintaining HUS parts. In maintenance work, part of
the TOE functionality is used to read information about HUS parts. The TOE does not
identify or authenticate users who use this function but recognize them as unknown
users. (See (2) (b) in [TOE description] later) It makes it possible to perform
maintenance to change TOE setting and/or configuration by the defined procedure,
however, it is excluded from the assurance since such maintenance and the resulting
environment are out of the evaluation configuration of ISO/IEC15408
certification.(Defined procedure*: Refer to Section 3.1 of Hitachi Unified Storage 100
ISO/IEC15408 Certified Functions Guide. (For Maintenance personnel Version))
HUS provides functions for collecting trace information via management console. Trace
information contains hardware status of the devices and versions and status of internal
software including TOE, and is output to management console. Trace information is
collected by maintenance personnel when a failure (malfunction) occurs in a device and
used for analyzing its cause.
[TOE description]
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Next, the TOE, which operates in HUS, is described here. HUS, as disk array subsystem,
provides dedicated data storage areas to multiple host computers. A large number of
physical disk drives in HUS are integrated into one logical storage area and it is divided
into dedicated storage areas for each host computer and assigned. This control is
performed by the TOE. Host computers correspond to users who use the TOE service.
Administrators described later are also the TOE users.
The TOE assigns prepared logical storage area for each host computer on physical disk
drive storage media in HUS. Host computers can use assigned storage areas exclusively,
but the TOE prohibits them from accessing storage areas for other host computers. To
manage and control storage areas securely, the TOE provides security functionality, with
Organizational security policies considered.
Integrating a large number of host computer storage devices into disk arrays to build
shared resources enables not only efficient use of storage devices but also integrated
operation and maintenance work, and security operations. This provides many benefits
that make overall system economical, efficient and reliable, and so on.
(2) Key security features
HUS containing the TOE is used in a secure operational environment where all the
connected host computers, the dedicated network and the management consoles where
host computers are connected, and the LAN where management consoles are connected,
are physically and logically access-controlled (Users must prepare such operational
environment). In this operational environment, physical and logical attacks are prohibited
to the TOE and its key IT environment. TOE security features alleviate the security risks
to the TOE caused by operation and maintenance Key security features of the TOE are
shown in the following (a) to (c).
(a) Exclusive control of storage areas
This generates logical storage areas controlled by the TOE in physical storage areas
provided by disk drive storage media (included in HUS, but is not the TOE), and
assigns the exclusive logical storage areas to each host computer, which corresponds
to a TOE user.
(b) User management
TOE users are divided into two groups: host computers and HUS users (also TOE
administrators in this ST and maintenance personnel). This user management
function deals with the administrators. By identifying and authenticating
administrators, and assigning those permissions corresponding to their roles, it
realizes secure operational administrations of the TOE resources. The TOE provides
three types of administrators' roles: Account Administrator, Storage Administrator,
and Audit Log Administrator. Each role is further divided into two groups: those who
can only view the setting data and those who can view and modify the setting data.
This means that the TOE has six types of administrators' roles in total.
5
In this regard, however, the use of readout permission by Account Administrators
and Storage Administrators is a basic function; thus, it is not a target of this function.
Also, a TOE function is utilized when HUS users read HUS configuration parts
information. TOE treats HUS users as anonymous users since the TOE does not
manage HUS users individually. HUS users can read only the limited information
without being identified and authenticated by the TOE.
(c) Audit
The TOE records operations of the TOE by users (administrators) in the audit trail as
audit log data. Audit log data can be read from the TOE and transferred to an
external Syslog server.
1.3.3 Hardware/software/firmware other than TOE
Hardware/software/firmware that are required for the TOE are described here.
[HUS]
The TOE is software operating in HUS, which is a disk array system. The TOE requires
low-level hardware for the operational environment of the TOE. Disk drives are used as
storage media resources for HUS to serve as disk array system. Users in Japan do not
need to prepare these additional TOE operational environments as they are included in
HUS, which is a unified disk array subsystem. For international users, files that contain
the TOE and its OS, manuals, and hardware including disk drives are provided (shipped).
They should prepare TOE operational environments according to the preparation
procedures and the user's guidance.
HUS is a product family including “Hitachi Unified Storage 100” as described in 1.3.1.
Table 1-1 shows key IT environment configuration elements used in the TOE.
Table 1-1 Key IT environment used in TOE
Component Description
Control hardware HT-4017-XSS/XSL/XSSA/XSLA(DF850XS)※
Disk drive unit HT-F4017-DBS/L
(Drive units that accommodate 24 units of 2.5-inch
drives/12 units of 3.5-inch drives/48 units of 3.5-inch
drives)
6
※ XSS/XSSA accommodates 24 units of 2.5-inch drives. XSL/XSLA accommodates 24
units of 3.5-inch drives. This means that you do not necessarily connect disk arrays.
Also note that XSS/XSL supports (only) Fibre Channel for host connection interface.
XSSA/XSLA supports (only) iSCSI for host connection interface.
[Management console]
PC is used for managing the TOE. This PC is a general product in which Windows XP
SP3 is used as OS and the WEB browser (IE ver.8.0) runs, but it features the dedicated
utility program (Hitachi Storage Navigator Modular 2), which is used by administrators
to use the TOE services. This utility program is provided for users with HUS, as it is
essential software to utilize the services (management functions) that the TOE provides.
Details of management console are described in the guidance that comes with HUS.
The version of the dedicated utility program (Hitachi Storage Navigator Modular 2) for
using services of the TOE is shown below. It is necessary to use the utility program
shown as below (Hitachi Storage Navigator Modular 2) to uniform the operational
environment and the evaluation configuration.
Name: Hitachi Storage Navigator Modular 2
Version: 21.70
Developer: Hitachi, Ltd.
[Host computers]
Host computers that use HUS services correspond to the TOE users. Host computers use
disk array function that is provided by HUS via the connection control process of the
TOE. HUS can support various OSs of host computers, such as Windows, HP-UX,
Solaris, Linux, and AIX, but they are independent from the TOE security functionality.
Details of host computers are described in the guidance that comes with HUS.
[Details of IT environment]
To use HUS including the TOE, the configuration of dedicated network and disk drives,
etc., needs to be designed appropriately. Details of these IT environments are described
in the guidance that comes with HUS.
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1.4 TOE description
1.4.1 TOE and its IT environment
First, the relationship between HUS, which is a unified IT product, and the TOE, which
operates in it, is described.
The TOE is software that operates in HUS. Figure 1-2 is a diagram showing the TOE and
its IT environment. The TOE builds logical storage areas on the disk drives mounted on
HUS, divides logical storage areas for each host computer connected to HUS and assigns
them, and controls host computers to exclusively use their storage areas.
Figure 1-2 TOE and its IT environment
In Figure 1-2, multiple host computers are collectively shown as "host computers". Each
host computer is connected to HUS via a dedicated network, one of the two types: FC-
SAN or IP-SAN, which are described in 1.3.2 (1), and uses logical storage areas built on
disk drives, being controlled by the TOE.
The TOE is called the control software. The control software operates on the control
hardware. Disk drives are managed by these control software and control hardware to
make the assigned storage area resources available to host computers.
HUS
Control hardware
Host computer
TOE
Management
console Control software
Disk drives
Dedicated network
8
Next, the connection control between host computers and logical storage areas built on
disk drives is described using Figure 1-3.
TOE
Connection
management
table
Host computer
Disk drives
n-1
a
b
c
d
Maintenance PC
a～d: Ports
1～n:
1
2
n
Connection control
process
Logical storage areas which are
assigned to host computers
(Substance is formed on a disk
drive)
Figure 1-3 Connection control between host computers and logical storage
areas
In Figure 1-3, ports (a - d) of the TOE accommodate host computers via a dedicated
network. In the TOE, the connection control process receives requests from each host
computer and accesses logical storage areas (1 - n) assigned exclusively to each host
computer based on the requests. The connection control process is the subject (active
entity) in the TOE, and logical storage areas (1 - n) are the objects (passive entities) in
the TOE. These logical storage areas are built on physical storage areas on disk drive
storage media and associated with host computers by the TOE Security Functionality
(TSF).
Host computers send requests towrite/read data to the connection control process. Upon
receiving requests, the connection control process refer to the connection management
table to associate host computers with logical storage areas, accesses logical storage
areas assigned to host computers to write/read data, and returns its result to the host
computers. Multiprocessing is performed for these operations by the connection control
process and multiple host computers' requests are processed simultaneously. Host
computers can use the assigned storage areas exclusively, but accessing to other storage
areas is prohibited by the TSF.
The correspondence between host computers and logical storage areas can be changed by
modifying the connection management table by administrators (Storage Administrators).
The connection management table is modified using the management console.
Management console
9
1.4.2 Physical boundaries
The physical TOE consists of the following (a) and (b).
(a) Hitachi Unified Storage 110 Microprogram
(b) User's guidance: detailed in Table 1-2
Table 1-2 User's guidance
Type Document Edition
number
Program Product
User's guide
Hitachi Unified Storage 100 Account Authentication User's Guide
(Japanese: Account Authenticationユーザーズガイド（HUS100 シ
リーズ）)
5th
Hitachi Unified Storage 100 Audit Logging User's Guide
(Japanese: Audit Loggingユーザーズガイド (HUS100 シリーズ）)
5th
Hitachi Unified Storage 100 LUN Manager User's Guide
(Japanese: LUN Managerユーザーズガイド （HUS100 シリーズ）)
4th
Disk array
User's guide (with
maintenance)
Hitachi Unified Storage 100 Series Disk Array System
User’s Guide
(Japanese: HUS100シリーズディスクアレイ ユーザーズガイド)
6th
Hitachi Unified Storage 100 Series Disk Array System
Service Guide
(Japanese: HUS100シリーズディスクアレイ サービスガイド)
6th
Disk array
User's guide (without
maintenance)
Hitachi Unified Storage 110 Disk Array System
User’s Guide
(Japanese: Hitachi Unified Storage 110
ディスクアレイ ユーザーズ ガイド)
6th
Hitachi Storage Navigator
Modular 2 User's Guide
Hitachi Storage Navigator Modular 2（for GUI）User's Guide
(Japanese: Hitachi Storage Navigator Modular 2（for GUI） ユーザー
ズガイド)
54th
Hitachi Storage Navigator Modular 2（for CLI） User's Guide
(Japanese: Hitachi Storage Navigator Modular 2（for CLI） ユーザー
ズガイド)
58th
Host Installation Guide Hitachi Unified Storage 100Series
Host Installation Guide for Fibre Channel Connection
(Japanese: Hitachi Unified Storage 100シリーズ
Fibre Channel接続用 ホストインストールガイド)
3rd
Hitachi Unified Storage 100 Series
Host Installation Guide for iSCSI Connection
(Japanese: Hitachi Unified Storage 100シリーズ
2nd
10
The above (a) corresponds to the TOE in Figure 1-2. In Figure 1-2, components other
than the TOE are IT environments of the TOE.
The above (b) are guidance documents that come with HUS. Operations and
managements of the TOE and its IT environments are covered in these documents.
1.4.3 Logical boundaries
The following (a) to (c) are security functions provided by the TOE.
(a) Exclusive control of storage area
The TOE manages physical storage areas provided by disk drive storage media
(outside of the TOE) as logical storage areas in the TOE. It assigns logical storage
areas to each host computer and controls access to disk drives by host computers so
that assigned storage areas can be used as exclusive volumes for each host computer.
Access control between host computers and disk drives is performed based on the
information of the connection management table in the TOE. The information of the
connection management table is managed by administrators who have the Storage
Administrator role. This role includes generating a logical storage area for each host
computer and setting initial values of access permission.
(b) User management
TOE users who are targets of the user management function are administrators with
the following divided six roles (permission group). Host computers are also TOE
users, but they are not administrators and not targets of this function. User
management function 1) identifies and authenticates users, and 2) grants authorized
users permissions to use the TOE resources according to the permission group.
The roles of users (administrators) management by the TOE are divided into the
following three groups, and each group is further divided into two groups: those who
have View permission and those who have View and Modify permissions. Thus,
there are six administrator's roles in total.
iSCSI接続用 ホストインストールガイド)
Hitachi Unified Storage
100 ISO/IEC15408
Certified Functions Guide
Hitachi Unified Storage 100 ISO/IEC15408 Certified Functions Guide
(for Administrators/Users)
(Japanese: Hitachi Unified Storage 100 ISO/IEC15408認証取得機能取
扱説明書(管理者/利用者編))
2nd
Hitachi Unified Storage 100 ISO/IEC15408 Certified Functions Guide
(for Maintenance)
(Japanese: Hitachi Unified Storage 100 ISO/IEC15408認証取得機能取
扱説明書(保守員編))
1st
11
▪ Account Administrator administrates accounts of all the administrators
▪ Storage Administrator administrates storage area assignment of host
computers
▪ Audit Log Administrator administrates settings of the audit trail related to
TOE security functionality
However, the use of View permission by Account Administrators and Storage
Administrators is a basic function, and it is not included in this function.
The TOE functions are used when HUS users read HUS configuration part
information. HUS users, when they read HUS configuration part information are not
included in the user management of the TOE, and are treated as anonymous users.
The TOE allows them to read only the limited information without identifying and
authenticating them.
(c) Audit
The TOE records operations of the TOE by users (administrators) in the audit trail as
audit log data. If the size of the audit trail exceeds a prescribed size, the oldest data
is overwritten by new data. Recorded audit log data can only be accessed by Audit
Log Administrators. Audit log data can be not only read directly from the TOE but
also automatically transferred to an external Syslog server (outside of the TOE)
according to the TOE settings. If it is transferred to a Syslog server, it is stored in
both the TOE and a Syslog server. A Syslog server has more data storage areas to
accommodate more data that would be deleted automatically in the TOE by
overwriting, enabling it to be stored in a Syslog server for a long time.
12
2 Conformance claims
2.1 CC conformance claims
This ST and the TOE conform to the CC version 3.1, Revision 3.
The CC that is used in developing the ST is the Japanese version provided by JISEC.
They claim conformance as follows:
▪ Part 2: Security functional components Version 3.1 Revision 3 [Japanese Version
1.0]
▪ Part 3: Security assurance components Version 3.1 Revision 3 [Japanese Version
1.0]
2.2 PP claims
This ST does not claim conformance to other PPs.
2.3 Package claims
This ST contains the assurance requirements for the TOE from the EAL2 assurance
package.
2.4 Rationale
No rationale is provided because this ST does not claim conformance to other PPs.
13
3 Security problem definition
This section defines security problems related to the TOE. Threats, organizational
security policies, and assumptions are given identification name of [T.xxxx], [P.xxxx],
and [A.xxxx] respectively.
3.1 Assets
HUS where the TOE is included provides data storage areas exclusively used by host
computers connected. The storage areas can be accessed only by the host computers that
are registered in HUS to associate with the areas.
The key asset protected by the TOE is the data storage area provision service by HUS.
This service provides host computers with the secure use environment for assigned data
storage areas. The data storage areas that are used by host computers are protected
against other host computers’ interferences. The TOE Security Functionality (TSF)
and/or data used by TSF (TSF data) are required for the key asset to be kept secure.
3.2 Threats
There is no threat to be countered with regard to this TOE.
3.3 Organizational security policies
P.Exclusive_assign A logical storage area for each host computer is assigned
exclusively to each host computer. In other words, the logical
storage area used by a host computer does not allow access by
other host computers.
P.Audit The TOE records the following event based on operation results
by users (administrators) as audit data. Only authorized users can
access the audit data. If the audit data storage area becomes full,
the oldest data is overwritten by the newest data to prevent loss of
new audit data.
▪ Successful and/or failure events on identification and
authentication of users (administrators)
▪ Successful events on the setting of enabling/disabling audit log
data transfer to the Syslog server.
14
▪ Successful events for the modified operation against the
session timeout value.
▪ Successful and/or failure events on performing the forced
logout procedure of login users (administrators).
▪ Successful and/or failure events on the operation of either
change default, modification, or deletion of information
associating host computers with logical storage areas
(connection management table)
P.User_role The TOE distinguishes the following roles of users
▪ Account Administrator (View and Modify)
▪ Account Administrator (View Only) (Basic functions are
provided.)
▪ Storage Administrator (View and Modify)
▪ Storage Administrator (View Only) (Basic functions are
provided.)
▪ Audit Log Administrator (View and Modify)
▪ Audit Log Administrator (View Only)
Also, the following TOE operations are allowed only for the users
who have their permission
▪ Account Administrator (View and Modify): Settings of
accounts for all the administrators, the forced logout for
login users
▪ Account Administrator (View and Modify): Setting the session
timeout value
▪ Storage Administrator (View and Modify): Setting of the
access control for disk drive storage media
▪ Audit Log Administrator (View and Modify): Readout of the
audit trail, Setting of enabling/disabling audit log data
transfer to the Syslog server
▪ Audit Log Administrator (View Only): Readout of the audit
trails
15
P.Session_timeout The TOE forcibly terminates the session of an administrator if the
session timeout value specified by Account Administrator (View
and Modify) is exceeded during the operation of the TOE by the
administrator.
3.4 Assumptions
A.Environment The TOE and HUS where the TOE resides, will be located in
physically and logically access-controlled secure environment, *
along with the connected host computers, dedicated network
where the host computers are connected, management console,
and LAN connected to the management console.
If audit log data of the TOE is transferred to a Syslog server
connected to HUS, the transferred audit log data of the TOE will
be managed securely so that the security policy of the TOE will
not be compromised.
* Physically and logically access-controlled secure environment
means a secure area where only Storage Administrators, Account
Administrators, Audit Log Administrators, and Maintenance
personnel are allowed to enter and leave, and where each network
is set directly inaccessible from the external network by firewall,
etc.
A.Administrator The administrators who are TOE users will not perform malicious
operations that may compromise the security of the TOE and will
follow the instructions provided by the TOE guides to change
settings or build configurations.
A.Configuration The settings related to security functionality of the TOE will be
set by administrators for each function to the appropriate settings.
In the appropriate settings, all of the following conditions are
met.
▪ Audit functions and identification and authentication function
for users (administrators) set up to be enabled.
▪ Exclusive control of storage area is run
16
4 Security objectives
This chapter defines the security objectives for the security problems specified in
Chapter 3 that are addressed by the TOE or its environment. The security objectives to be
addressed by the TOE are described in 4.1, and the security objectives to be addressed by
its environment are described in 4.2. Rationale of the appropriateness for these security
objectives against security problems is described in 4.3.
The security objectives for the TOE and for the operational environment are shown with
identifiers beginning with “O.” or “OE.” respectively.
4.1 Security Objectives for the TOE
This section defines the security objectives to be addressed by the TOE regarding the
organizational security policies defined as security problems.
O.Exclusive_access The TOE will ensure that only designated host computers can
access to the exclusively assigned logical storage areas so that it
prevents accesses from other host computers.
O.Audit The TOE must record the following events based on operation
results by users (administrators) as audit data. Audit data must
be protected from unauthorized access by unauthorized users.
The loss of new audit data must be prevented by overwriting the
oldest data with new data when the recorded area becomes full.
▪Successful and/or failure events on identification and
authentication of users (administrators)
▪Successful events on the setting of enabling/disabling audit log
data transfer to the Syslog server
▪Successful events for the modified operation against the
session timeout value.
▪Successful and/or failure events on the forced logout procedure
of login users (administrators).
▪Successful and/or failure events on the operation of either
change default, modification, or deletion of information
associating host computers with logical storage areas
(connection management table)
O.User_role The TOE will maintain the following user roles. To prevent
17
inconsistency in controlling operations, multiple users who have
the same role must be prohibited from setting the TOE
simultaneously.
▪Account Administrator (View and Modify)
▪Account Administrator (View and Modify) (Basic functions are
provided.)
▪Storage Administrator (View and Modify)
▪Storage Administrator (View Only) (Basic functions are
provided.)
▪Audit Log Administrator (View and Modify)
▪Audit Log Administrator (View Only)
Also, the following TOE operations are allowed only for the
users who have their permissions
▪Account Administrator (View and Modify): Setting of accounts
for all the administrators, and performing the forced logout
for login users
▪Account Administrator (View and Modify): Setting of the
session timeout value
▪Storage Administrator (View and Modify): Setting of the
access control for disk drive storage media
▪Audit Log Administrator (View and Modify): Readout of the
audit trail, and Setting of enabling/disabling audit log data
transfer to the Syslog server
▪Audit Log Administrator (View Only): Readout of the audit
trails
O.Session_timeout The TOE will forcibly terminate the session of an administrator if
the session timeout value specified by Account Administrator
(View and Modify) is exceeded during the operation of the TOE
by the administrator.
4.2 Security objectives for the operational environment
This section defines the security objectives to be addressed by the operational
environment of the TOE regarding organizational security policies, which are defined as
security problems, and assumptions.
18
OE.Environment The TOE and HUS where the TOE resides will be located in
physically and logically access-controlled secure environment, *
along with the connected host computers, dedicated network
where host computers are connected, management console, and
LAN connected to the management console.
If audit log data of the TOE is transferred to a Syslog server
connected to HUS, the transferred audit log data of the TOE will
be managed securely so that the security policy of the TOE will
not be compromised.
* Physically and logically access-controlled secure environment
means secure area whereonly Storage Administrators, Account
Administrators, Audit Log Administrators, and Maintenance
personnel are allowed to enter and leave, and where each network
is set directly inaccessible from the external network by firewall,
etc.
OE.Administrator To ensure that the administrators who are TOE users do not
perform malicious operations that may compromise the security
of the TOE, consumers who deploy HUS will assign reliable
administrators to change settings or build configurations
according to the TOE guidance.
OE.Configuration The settings related to security functionality of the TOE will be
set by administrators for each function to the appropriate settings.
In the appropriate settings, all of the following conditions are
met.
▪ Audit function and identification and authentication function
for users (administrators) are set up to be enabled.
▪ LUN Manager is enabled. (=Exclusive control of storage area
is run)
4.3 Security objectives rationale
This section provides rationale supporting the effectiveness of the above security
objectives against each item of the security problem definitions. In 4.3.1, tracing between
each security objective and any of the security problems is described, while4.3.2 explains
that, each security problem is effectively addressed by the corresponding security
objectives.
19
4.3.1 Tracing between security problem definition and security objectives
Table 4-1 shows tracing between security problem definitions and security objectives. As
shown in this table, all the security objectives trace to one security problems.
Table4-1 Tracing between security problem definition and security objectives
Security problem
definition
Security
Objectives
O.Exclusive_access
O.Audit
O.User_role
O.Session_timeout
OE.Environment
OE.Administrator
OE.Configuration
P.Exclusive_assign x
P.Audit x
P.User_role x
P.Session_timeout x
A.Environment x
A.Administrator x
A.Configuration x
4.3.2 Security objectives rationale
This subsection provides rationale that security objectives for the TOE and operational
environment successfully enforce the organizational security policies, and properly meet
the assumptions.
P.Exclusive_assign O.Exclusive_access covers all the organizational security policies
defined in P.Exclusive_assign and properly enforces
P.Exclusive_assign.
P.Audit O.Audit directly supports the organizational security policies
defined in P.Audit and properly enforces P.Audit.
P.User_role O.User_role supports the organizational security policies defined
in P.User_role and defines countermeasures to prevent conflicts
over users’ roles against users’ roles to function properly. This
20
security objective properly enforces P.User_role.
P.Session_timeout O.Session_timeout directly supports the organizational security
policies defined in P.Session_timeout and properly enforces
P.Session_timeout.
A.Environment OE.Environment directly supports the organizational security
polices defined in A.Environment and properly addresses
A.Environment.
A.Administrator OE.Administrator directly supports the organizational security
policies defined in A.Environment and properly addresses
A.Environment.
A.Configuration OE.Configuration directly supports the organizational security
policies defined in A.Configuration and properly addresses
A.Configuration.
21
5 Extended components definition
This ST does not define extended components definition.
22
6 Security requirements
6.1 Security functional requirements
The SFRs specified in this ST have been drawn from components described in the CC
part 2. Table 6-1 lists the SFRs.
Table 6-1 SFR
6.1.1 FAU_GEN.1 Audit data generation
6.1.2 FAU_GEN.2 User identity association
6.1.3 FAU_SAR.1 Audit review
6.1.4 FAU_SAR.2 Restricted audit review
6.1.5 FAU_STG.1 Protected audit trail storage
6.1.6 FAU_STG.4 Prevention of audit data loss
6.1.7 FDP_ACC.1 Subset access control
6.1.8 FDP_ACF.1 Security attribute based access control
6.1.9 FIA_ATD.1 User attribute definition
6.1.10 FIA_SOS.1 Verification of secrets
6.1.11 FIA_UAU.1 Timing of authentication
6.1.12 FIA_UAU.2 User authentication before any action
6.1.13 FIA_UAU.5 Multiple authentication mechanisms
6.1.14 FIA_UID.1 Timing of identification
6.1.15 FIA_UID.2 User identification before any action
6.1.16 FIA_USB.1 User-subject binding
6.1.17 FMT_MOF.1 Management of security functions behavior
6.1.18 FMT_MSA.1 Management of security attributes
6.1.19 FMT_MSA.3 Static attribute initialization
6.1.20 FMT_MTD.1 Management of TSF data
6.1.21 FMT_REV.1 Revocation
6.1.22 FMT_SMF.1 Specification of Management Functions
6.1.23 FMT_SMR.1 Security roles
6.1.24 FPT_STM.1 Reliable time stamps
6.1.25 FRU_RSA.1 Maximum quotas
6.1.26 FTA_SSL.3 TSF-initiated termination
The SFRs are defined by performing necessary operations to each security functional
component. The following conventions are used to describe operations in each SFR.
▪ Assignment and selection are identified in [assignment: XXX(Italics)] and
[selection: XXX(Italics)] respectively.
▪ In selectable operations, items not selectable are identified in strike through
(strike through).
▪ In refinement operations, refined parts are identified in Italics & Bold.
23
The following are SFRs defined in this ST.
6.1.1 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 function;
b) All auditable events for the [selection, choose one of: minimum, basic,
detailed, not specified] level of audit; and
c) [Assignment: other specifically defined auditable events in Table 6-2].
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 (if applicable),
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, [assignment: none].
Table 6-2
Auditable event
Successful and/or failure events on identification and authentication of users
(administrators)
Successful events on the setting of (enabling/disabling) audit log data transfer
to the Syslog server
Successful and/or failure events on the operation of either change default,
modification, or deletion of information associating host computers with logical
storage areas (connection management table)
Successful events of the operations of delete modifying the following TSF data.
• Session timeout value
Successful and/or failure events on the forced logout of login users
(administrators)
6.1.2 FAU_GEN.2 User identity association
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FIA_UID.1 Timing of identification
24
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.
6.1.3 FAU_SAR.1 Audit review
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FAU_SAR.1.1 The TSF shall provide [assignment: Audit Log Administrator (View and
Modify) and Audit Log Administrator (View Only)] with the capability to read
[assignment: all the recorded information] from the audit records.
FAU_SAR.1.2 The TSF shall provide the audit records in a manner suitable for the user to
interpret the information.
6.1.4 FAU_SAR.2 Restricted audit review
Hierarchical to: No other components.
Dependencies: FAU_SAR.1 Audit review
FAU_SAR.2.1 The TSF shall prohibit all users read access to the audit records, except those
users that have been granted explicit read-access.
6.1.5 FAU_STG.1 Protected audit trail storage
Hierarchical to: No other components.
Dependencies: FAU_GEN.1 Audit data generation
FAU_STG.1.1 The TSF shall protect the stored audit records in the audit trail from
unauthorized deletion.
FAU_STG.1.2 The TSF shall be able to [selection, choose one of: prevent, detect]
unauthorized modifications to the stored audit records in the audit trail.
6.1.6 FAU_STG.4 Prevention of audit data loss
Hierarchical to: FAU_STG.3 Action in case of possible audit data loss
Dependencies: FAU_STG.1 Protected audit trail storage
FAU_STG.4.1 The TSF shall [selection, choose one of: “ignore audited events”, “prevent
audited events, except those taken by the authorized user with special rights”,
“overwrite the oldest stored audit records”] and [assignment: none] if the audit
trail is full.
25
6.1.7 FDP_ACC.1 Subset access control
Hierarchical to: No other components.
Dependencies: FDP_ACF.1 Security attribute based access control
FDP_ACC.1.1 The TSF shall enforce the [assignment: HUS access control SFP] on
[assignment: list of subject :< connection control process*1
>, objects :<
logical storage areas*2
>, and operations :< data write and/or read> among
subjects and objects covered by SFP]
*1
A process operating in the TOE. Upon receiving requests for data write and read to
disk array from each host computer, it executes the requests to TSF-controlled logical
storage areas assigned to the host computer and return its result to the host computer.
Only one instance is generated in the TOE. It operates consistently while the TOE is
in operation and handles all the requests from host computers simultaneously.
*2
Logical storage areas are controlled by the TSF and built on the storage media of disk
drives (outside of the TOE). (One or more) objects corresponding to these are
generated for each host computer.
6.1.8 FDP_ACF.1 Security attribute based access control
Hierarchical to: No other components.
Dependencies: FDP_ACC.1 Subset access control
FMT_MSA.3 Static attribute initialization
FDP_ACF.1.1 The TSF shall enforce the [assignment: HUS access control SFP] to objects
based on the following: [assignment: list:<in Table 6-3> of subjects and
objects controlled under the indicated SFP, and for each, the SFP-relevant
security attributes, or named groups of SFP-relevant security attributes:<in
Table 6-3>].
Table 6-3
Entity Security attribute
Subject:
Connection control
process
• ID of the host computer that sent request to the
subject
• Object ID (contained in the request from host
computer)
Object:
Logical storage areas
• Object ID
• Host computer ID
FDP_ACF.1.2 The TSF shall enforce the following rules to determine if an operation among
controlled subjects and controlled objects is allowed: [assignment: If an object
ID contained in the subject and object match and "ID of the host computer that
sent request to the subject" match "host computer ID" contained in the security
attributes of the object identified as access target, the subject can perform the
26
operation to the object requested by the host computer].
FDP_ACF.1.3 The TSF shall explicitly authorize access of subjects to objects based on the
following additional rules: [assignment: none].
FDP_ACF.1.4 The TSF shall explicitly deny access of subjects to objects based on the
following additional rules: [assignment: none].
6.1.9 FIA_ATD.1 User attribute definition
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_ATD.1.1 The TSF shall maintain the following list of security attributes belonging to
individual users: [assignment: list of security attributes shown in Table 6-4].
Table 6-4
User Security attribute
Host
computers
• Host computer ID
• Object ID (One or more objects are assigned to host
computer and their information is maintained being
associated with objects.)
Administrators
• ID (Information that can identifies individuals)
• Roles (One of the six roles shown in Table 6-9.; multiple
roles can be allowed)
• Authentication status (Information that indicates whether
authenticated or not)
6.1.10 FIA_SOS.1 Verification of secrets
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_SOS.1.1 The TSF shall provide a mechanism to verify that secrets meet [assignment: six
or more characters].
6.1.11 FIA_UAU.1 Timing of authentication
Hierarchical to: No other components.
Dependencies: FIA_UID.1 Timing of identification
FIA_UAU.1.1 The TSF shall allow [assignment: read of HUS configuration information
(configuration part type, quantity, status, trace information)] on behalf of the
user to be performed before the user who corresponds to the administrator is
27
authenticated.
FIA_UAU.1.2 The TSF shall require each user to be successfully authenticated before
allowing any other TSF-mediated actions on behalf of that user.
6.1.12 FIA_UAU.2 User authentication before any action
Hierarchical to: FIA_UAU.1 Timing of authentication
Dependencies: FIA_UID.1 Timing of identification
FIA_UAU.2.1 The TSF shall require each user that corresponds to each host computer to be
successfully authenticated before allowing any other TSF-mediated actions on
behalf of that user.
6.1.13 FIA_UAU.5 Multiple authentication mechanisms
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_UAU.5.1 The TSF shall provide [assignment: list of multiple authentication mechanisms
shown in Table 6-5] to support user authentication.
FIA_UAU.5.2 The TSF shall authenticate any user's claimed identity according to the
[assignment: rules describing how the multiple authentication mechanisms
provide authentication shown in Table 6-5].
Table 6-5
Authentication mechanism Authentication target
By password
Users who correspond to
administrators
By WWN (World Wide Name), which is
the unique number of Fibre Channel
HBA (Host Bus Adaptor) in host
computer
Users that correspond to host
computers
By iSCSI NAME, which is the unique
information of iSCSI HBA in host
computer
Users that correspond to host
computers
None
Access via HUS web port (Only
specific data defined in
FIA_UAU.1/FIA_UID.1 can be
read by anonymous users.)
28
6.1.14 FIA_UID.1 Timing of identification
Hierarchical to: No other components.
Dependencies: No dependencies.
FIA_UID.1.1 The TSF shall allow [assignment: the readout of HUS configuration
information (configuration part type, quantity, status, trace information)] on
behalf of the user to be performed before the user who corresponds to the
administrator is identified.
FIA_UID.1.2 The TSF shall require each user to be successfully identified before allowing
any other TSF-mediated actions on behalf of that user.
6.1.15 FIA_UID.2 User identification before any action
Hierarchical to: FIA_UID.1 Timing of identification
Dependencies: No dependencies.
FIA_UID.2.1 The TSF shall require each user that corresponds to each host computer to be
successfully identified before allowing any other TSF-mediated actions on
behalf of that user.
6.1.16 FIA_USB.1 User-subject binding
Hierarchical to: No other components.
Dependencies: FIA_ATD.1 User attributes definition
FIA_USB.1.1 The TSF shall associate the following user security attributes with subjects
acting on the behalf of that user: [assignment: host computer ID].
FIA_USB.1.2 The TSF shall enforce the following rules on the initial association of user
security attributes with subjects acting on the behalf of users: [assignment: If
the subject receive a write or read request to a disk drive from a host
computer, the subject associates the host computer ID with the security
attribute of the subject].
FIA_USB.1.3 The TSF shall enforce the following rules governing changes to the user
security attributes associated with subjects acting on the behalf of users:
[assignment: If the subject receives a new request from a host computer, the
subject replaces the security attribute associated with the subject by host
computer ID associated with the new request after completing the process in
progress. A host computer to be associated with the new request can be
identical to or different from the previous host computer].
29
6.1.17 FMT_MOF.1 Management of security functions behavior
Hierarchical to: No other components.
Dependencies: FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MOF.1.1 The TSF shall restrict the ability to [selection: determine the behavior of,
disable, enable, modify the behavior of] the functions [assignment: transferring
audit log data to a Syslog server] to [assignment: Audit Log Administrator
(View and Modify)].
6.1.18 FMT_MSA.1 Management of security attributes
Hierarchical to: No other components.
Dependencies: [FDP_ACC.1 Subset access control, or
FDP_IFC.1 Subset information flow control]
FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MSA.1.1 The TSF shall enforce the [assignment: HUS access control SFP] to restrict the
ability to [selection: see Table 6-6] the security attributes [assignment: object
ID, host computer ID associated with objects, information defining logical
storage areas of objects] to [assignment: administrators in Table 6-6].
Table 6-6
Administrator Selection
Storage Administrator (View
and Modify)
change default, query, modify, delete,
[assignment: other operations]
6.1.19 FMT_MSA.3 Static attribute initialization
Hierarchical to: No other components.
Dependencies: FMT_MSA.1 Management of security attributes
FMT_SMR.1 Security roles
FMT_MSA.3.1 The TSF shall enforce the [assignment: HUS access control SFP] to provide
[selection, choose one of: restrictive, permissive, [assignment: other property]]
default values for security attributes that are used to enforce the SFP.
FMT_MSA.3.2 The TSF shall allow the [assignment: Storage Administrator (View and
Modify)] to specify alternative initial values to override the default values
when an object or information is generated.
30
6.1.20 FMT_MTD.1 Management of TSF data
Hierarchical to: No other components.
Dependencies: FMT_SMR.1 Security roles
FMT_SMF.1 Specification of Management Functions
FMT_MTD.1.1 The TSF shall restrict the ability to [selection: change_default, query, modify,
delete, clear, [assignment: operations in Table 6-7]] the [assignment: list of
TSF data in Table 6-7] to [assignment: the authorized identified roles in Table
6-7].
Table 6-7
Role TSF data Operation
Account
Administrator (View
and Modify)
User ID Change default, delete
User password
(All users)
Change default, modify
User roles Change default, modify
Session timeout Modify
Account
Administrator (View
Only)
Own password Modify
Audit Log
Administrator (View
and Modify)
Audit trail Query
Own password Modify
Audit Log
Administrator (View
Only)
Audit trail Query
Own password Modify
Storage
Administrator (View
and Modify)
Host computer ID
Change default, modify,
delete
Own password Modify
Storage
Administrator (View
Only)
Own password Modify
6.1.21 FMT_REV.1 Revocation
Hierarchical to: No other components.
Dependencies: FMT_SMR.1 Security roles
FMT_REV.1.1 The TSF shall restrict the ability to revoke [assignment: security attribute
indicating that authentication status is logged-in] associated with the
31
[selection: users who correspond to administrators, subjects, objects,
[assignment: other additional resources]] under the control of the TSF to
[assignment: Account Administrator (View and Modify)].
FMT_REV.1.2 The TSF shall enforce the rules [assignment: immediately change the
authentication status from logged-in to logged-out to stop TSF-mediated
actions on behalf of the user].
6.1.22 FMT_SMF.1 Specification of Management Functions
Hierarchical to: No other components.
Dependencies: No dependencies.
FMT_SMF.1.1 The TSF shall be capable of performing the following management functions:
[assignment: list of management functions to be provided by the TSF in Table
6-8].
Table 6-8
Management function
Note:
Corresponding
FMT class
Setting of enabling/disabling audit log data transfer to the
Syslog server
FMT_MOF.1
Management of security attributes associating host
computer with logical storage areas (objects)
FMT_MSA.1
Setting of security attributes when generating objects FMT_MSA.3
Management of TSF data shown in Table 6-7 FMT_MTD.1
6.1.23 FMT_SMR.1 Security roles
Hierarchical to: No other components.
Dependencies: FIA_UID.1 Timing of identification
FMT_SMR.1.1 The TSF shall maintain the roles [assignment: the authorized identified roles in
Table 6-9].
Table 6-9
Role
Account Administrator (View and Modify)
Account Administrator (View Only)
Storage Administrator (View and Modify)
Storage Administrator (View Only)
Audit Log Administrator (View and Modify)
Audit Log Administrator (View Only)
32
FMT_SMR.1.2 The TSF shall be able to associate users with roles.
6.1.24 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.
6.1.25 FRU_RSA.1 Maximum quotas
Hierarchical to: No other components.
Dependencies: No dependencies.
FRU_RSA.1.1 The TSF shall enforce maximum quotas<login count "1"> of the following
resources: [assignment: login count of the same set of user roles] that
[selection: individual user, defined group of users, subjects] can use [selection:
simultaneously, over a specified period of time].
6.1.26 FTA_SSL.3 TSF-initiated termination
Hierarchical to: No other components.
Dependencies: No dependencies.
FTA_SSL.3.1 The TSF shall terminate an interactive session after a [assignment: time
interval of the management console inactivity defined by Account
Administrator (View and Modify)].
6.2 Security assurance requirements
The security assurance requirements for this TOE are defined by the assurance
components shown in Table 6-10. All of these are included in Part 3 of the CC.
This ST applies no operations to all of the assurance components shown in Table 6-10.
Table 6-10 Assurance components
Assurance class Assurance component
Security Target evaluation
ASE_CCL.1
ASE_ECD.1
ASE_INT.1
ASE_OBJ.2
33
ASE_REQ.2
ASE_SPD.1
ASE_TSS.1
Development
ADV_ARC.1
ADV_FSP.2
ADV_TDS.1
Guidance documents
AGD_OPE.1
AGD_PRE.1
Life-cycle support
ALC_CMC.2
ALC_CMS.2
ALC_DEL.1
Tests
ATE_COV.1
ATE_FUN.1
ATE_IND.2
Vulnerability assessment AVA_VAN.2
6.3 Security requirement rationale
6.3.1 Security functional requirements rationale
This subsection provides rationale that the defined SFRs properly address the TOE
security objectives. In 6.3.1.1, a tracing that shows SFRs address which security
objectives for the TOE is described. In 6.3.1.2, a set of justifications that shows all
security objectives for the TOE are effectively addressed by SFRs is described.
6.3.1.1 Relation between security objectives and security functional requirements
The SFRs corresponding to the TOE security objectives are shown in Table 6-11. This
table shows rationale that all the SFRs can trace back to at least one TOE security
objective.
Table 6-11 Relation between TOE security objectives and SFRs
TOE security
objective
SFR
FAU_GEN.1
FAU_GEN.2
FAU_SAR.1
FAU_SAR.2
FAU_STG.1
FAU_STG.4
FDP_ACC.1
FDP_ACF.1
FIA_ATD.1
FIA_SOS.1
FIA_UAU.1
FIA_UAU.2
FIA_UAU.5
FIA_UID.1
FIA_UID.2
FIA_USB.1
FMT_MOF.1
FMT_MSA.1
FMT_MSA.3
FMT_MTD.1
FMT_REV.1
FMT_SMF.1
FMT_SMR.1
FPT_STM.1
FRU_RSA.1
FTA_SSL.3
O.Exclusive_access x x x x x x x
O.Audit x x x x x x x x x
O.User_role x x x x x x x x x x x x x
O.Session_timeout x
34
6.3.1.2 Justification for the tracing
Rational that shows all security objectives for the TOE are met by the corresponding
SFRs is described here. Effectiveness of each SFR to meet security objectives for the
TOE is also described.
O.Exclusive_access Logical storage areas of the TOE are assigned on a host computer
basis. This assignment is performed by the connection control
process i.e., subject in the TOE), receiving access requests to disk
drives from host computers and executing the requests to the
corresponding logical storage areas (i.e., objects in the TOE).
The TOE identifies and authenticates the host computer to
determine the host computer that sent access requests and verify
that the host computer is valid one registered in the TOE. This is
defined in FIA_UAU.2, FIA_UAU.5 and FIA_UID.2. Upon
receiving the request, the TOE subject associates the security
attribute of the verified host computer with that of subject. This
requirement is defined in FIA_USB.1. Security attribute for each
host computer is defined in FIA_ATD.1. The access to disk drive
storage areas from host computers is controlled based on the
security attributes associated with subjects and objects
respectively. This access control requirement is defined in
FDP_ACC.1 and FDP_ACF.1.
O.Exclusive_access is properly enforced by these SFRs.
O.Audit O.Audit defines audit data items to be collected and requires
protection of audit data. The requirements of audit log data items
to be collected correspond to FAU_GEN.1 and FAU_GEN.2.
FAU_GEN.2 requires that user ID be included in audit data.
FPT_STM.1 is defined for the requirement for time stamps
provided for audit data. FAU_SAR.1 and FAU_SAR.2 are applied
to the requirement for allowing only specific users (i.e., Audit
Log Administrators) to read audit data. To protect audit data,
FAU_STG.1 defines prevention of unauthorized deletion and
modification, and FAU_STG.4 defines the prevention of loss
when the storage area becomes full. FMT_MTD.1/FMT_SMF.1
defines audit data management by administrator. O.Audit is
properly enforced by these SFRs.
O.User_role FMT_SMR.1 defines requirements for managing six types of user
roles by the TOE. Identification and authentication corresponding
35
to roles are required and defined in FIA_UAU.1, FIA_UAU.5,
and FIA_UID.1. FIA_SOS.1 is used for test requirements for user
authentication. The security attributes of users include roles, the
requirements of which are defined in FIA_ATD.1.
The user's operations associated with each role include operations
of the TSF data, the requirement of which are defined in
FMT_MTD.1/FMT_SMF.1. Account Administrator (View and
Modify), one of the roles, administrates authentication status of
login users. FMT_REV.1 defines the requirements of discarding
security attributes of users whose authentication status is login.
Storage Administrator (View and Modify), one of the roles,
administrate security attributes related to access control, the
requirements of which are defined in FMT_MSA.1, FMT_MSA.3,
and FMT_SMF.1. Audit Log Administrators (View and Modify),
one of the roles, enables/disables audit log transfer to Syslog
server. The requirements are defined in
FMT_MOF.1/FMT_SMF.1.
If administrators who have the same role perform administrative
operations to the same resources simultaneously, its results
become inconsistent. To prevent this, assignment of users to the
resources needs to be limited. This requirement is defined in
FRU_RSA.1.
O.User_role is properly enforced by these SFRs.
O.Session_timeout FTA_SSL.3 requires that the interactive session of the
administrator account using it be forcibly terminated when the
session timeout period of the management console exceeds the
predetermined period of time defined by Account Administrator
(View and Modify). This covers all the objectives of
O.Session_timeout, properly enforcing O.Session_timeout.
6.3.1.3 Security functional requirement dependencies
Table 6-12 shows dependencies defined in each SFR and the satisfaction of them.
In Table 6-12, "Dependent requirement" shows dependencies defined in SFR and
"Satisfied by" shows which SFRs meet the defined dependencies. All the requirements on
which each SFR depends are satisfied.
Table 6-12 SFR dependencies
SFR Dependent Satisfied by
36
requirement
FAU_GEN.1 FPT_STM.1 FPT_STM.1
FAU_GEN.2
FAU_GEN.1
FIA_UID.1
FAU_GEN.1 and FIA_UID.1
FAU_SAR.1 FAU_GEN.1 FAU_GEN.1
FAU_SAR.2 FAU_SAR.1 FAU_SAR.1
FAU_STG.1 FAU_GEN.1 FAU_GEN.1
FAU_STG.4 FAU_STG.1 FAU_STG.1
FDP_ACC.1 FDP_ACF.1 FDP_ACF.1
FDP_ACF.1
FDP_ACC.1
FMT_MSA.3
FDP_ACC.1 and FMT_MSA.3
FIA_ATD.1 none –
FIA_SOS.1 none –
FIA_UAU.1 FIA_UID.1 FIA_UID.1
FIA_UAU.2 FIA_UID.1 FIA_UID.2
FIA_UAU.5 none –
FIA_UID.1 none –
FIA_UID.2 none –
FIA_USB.1 FIA_ATD.1 FIA_ATD.1
FMT_MOF.1
FMT_SMR.1
FMT_SMF.1
FMT_SMR.1 and FMT_SMF.1
FMT_MSA.1
[FDP_ACC.1 or
FDP_IFC.1]
FMT_SMR.1
FMT_SMF.1
FDP_ACC.1, FMT_SMR.1, and FMT_SMF.1
FMT_MSA.3
FMT_MSA.1
FMT_SMR.1
FMT_MSA.1 and FMT_SMR.1
FMT_MTD.1
FMT_SMR.1
FMT_SMF.1
FMT_SMR.1 and FMT_SMF.1
FMT_REV.1 FMT_SMR.1 FMT_SMR.1
FMT_SMF.1 none –
FMT_SMR.1 FIA_UID.1 FIA_UID.1
FPT_STM.1 none –
FRU_RSA.1 none –
FTA_SSL.3 none –
6.3.2 Security assurance requirements rationale
The TOE is operated in secure areas. Host computers that use the TOE services and
network that connects the TOE and host computers are also placed in the same
environment. The environment where the TOE resides is relatively undisturbed, lowering
necessity for considering the probability of being attacked for a long period of time. The
external interface of the TOE is limited, lowering probability of internal structure
vulnerability being exploited. Furthermore, attacks against the TOE development
37
environment are considered to be limited.
Given these characteristics of the TOE, EAL2 is suitable for security assurance
requirement.
38
7 TOE summary specification
7.1 Summary of measures for security functional requirements
This section provides summary the measures for security functional requirements for the
TOE. These measures are described by each SFR listed in 6.1.
7.1.1 FAU_GEN.1/FAU_GEN.2
Date and time of start-up and shutdown of the audit functions are recorded. Furthermore,
the following information is recorded when the events shown in Table 7-1 occur due to
triggered security functions to be audited.
[Information contained in audit data]
• Event date & time
• Event type
• User (administrator) ID
• Event results (success or failure)
Table 7-1 Audit events to be recorded
SFR Audit event
FIA_UAU.1/FIA_UID.1 Successful and/or failure events on triggered
mechanisms of identification and authentication of
users (Target users are administrators)
FMT_MOF.1 Successful events on the settings of
(enabling/disabling) audit log data transfer to the
Syslog server
FMT_MSA.1/FMT_MSA.3 Successful and/or /failure events on the operation of
either change default, modification, or deletion of
information associating host computers with logical
storage areas (connection management table)
FMT_MTD.1 Successful events of the operations of modifying the
following TSF data.
- Session timeout value
FMT_REV.1 Successful and/or /failure events on the forced logout
of login users (administrators)
7.1.2 FAU_SAR.1/FAU_SAR.2
The TOE shall identify and authenticate users (administrators) at login to provide only
users who have Audit Log Administrator role with the capability to read audit data. Users
39
access audit data in the TOE by using the management console in which the utility
program for HUS is installed. Audit data can be read directly from the TOE and
transferred to a Syslog server outside of the TOE. Anyone other than Audit Log
Administrators reading audit log sent to a Syslog server violates security objectives for
the TOE. A Syslog server is outside of the TOE, but its operation and management should
be performed so as not to violate security objectives for the TOE.
7.1.3 FAU_STG.1/FAU_STG.4
Up to 2,048 entries of the audit trail (1 entry: 1,024 byte) shall be stored and the oldest
data shall be overwritten by new data when the capacity is exceeded.
Audit records (audit data) stored in the audit trail can be collectively read by Audit Log
Administrators. The audit function is in operation while the TOE is in operation,
prohibiting deletion (initialization) and modification of the audit trail.
7.1.4 FDP_ACC.1/FDP_ACF.1
Access requests (write/read) to the disk array from host computers are processed by the
connection control process constantly operating in the TOE. The connection control
process receives requests from host computers, compares host computer ID information
with the connection control table in the TOE, and executes operations requested to
logical storage areas. If the IDs of the host computers are not registered, the request is
denied.
7.1.5 FIA_ATD.1
Users who have security attributes are divided into two types: host computers and
administrators. Each user has attributes shown in Table 7-2.
Table 7-2 User security attributes
User Security attribute
Host computer
• Host computer ID
• Object ID assigned to a host computer (One or more
objects are assigned and its information is managed
associated with objects. Requests sent by host computer
contain ID of object to be accessed. One object is
specified.)
Administrator
• ID (Information that can identify individual)
• Roles (Account Administrator [Modify/View], Storage
Administrator [Modify/View], Audit Log Administrator
[Modify/View]: 6 roles in total); more than one roles can
be assigned to individual who has one ID information
• Authentication status (indicating whether authenticated
or not)
40
7.1.6 FIA_SOS.1
The number of characters is checked when a password is registered by administrators. If
the password fails to meet the condition [6 characters], the registration of password is
denied.
7.1.7 FIA_UAU.1/FIA_UAU.2/FIA_UAU.5/FIA_UID.1/FIA_UID.2
FIA_UAU.1 and FIA_UID.1 are requirements for identifying and authenticating users
corresponding to administrators, FIA_UAU.2 and FIA_UID.2 for identifying and
authenticating host computers. FIA_UAU.5 is a requirement for defining the multiple
authentication mechanisms for both of the authentications.
[FIA_UAU.1/FIA_UAU.5/FIA_UID.1]
Administrators are identified and authenticated on an individual basis by ID and
password. The TOE services are provided for administrators via the management console
where the dedicated HUS utility program “Hitachi Storage Navigator Modular 2” is
installed. Management consoles are connected to HUS via LAN. The command sent from
the management console to the TOE contains user's ID and password, which is allowed to
be executed if identification and authentication succeed.
HUS users can read information related to HUS configuration parts (configuration part
type, quantity, status, trace information) without being identified and authenticated. It is
out of the user management by the TOE if HUS users read HUS configuration parts
related information.
[FIA_UAU.2/FIA_UAU.5/FIA_UID.2]
In identification and authentication of host computers, different sets of data are used
depending on the HBAs (Host Bus Adaptors) that are mounted on the host computers.
Fibre Channel HBA has WWN (World Wide Name), which is a unique number of it and
iSCSI HBA has iSCSI Name, which is its unique information. These sets of data are read
by the TOE when host computers are registered. If WWN or iSCSI Name contained in
the requested data matches the data registered in the TOE, identification and
authentication of host computer by the TOE succeeds, and the request from the host
computer is accepted.
7.1.8 FIA_USB.1
One connection control process operates constantly in the TOE. If the connection control
process receives a request from a host computer and identifies and authenticates the host
computer by WWN or iSCSI Name contained in the request, it associates the
identification information with its own security attribute and performs the requested
operation to a logical storage area.
Every time a request is issued from a host computer, the security attribute associated with
the connection control process is replaced by new information (host computer ID).
41
7.1.9 FMT_MOF.1
As one of the TOE audit functions, enabling/disabling audit log data transfer to a Syslog
server (outside of the TOE) can be performed by Audit Log Administrators (View and
Modify). Audit log data is recorded in the TOE as the audit trail regardless of the setting
of Syslog server transfer. These operations of changing the setting is performed via the
dedicated interface installed in the management console (a utility program called
“Hitachi Storage Navigator Modular 2”.
7.1.10 FMT_MSA.1
The association between requests from host computers and logical storage areas managed
by the TOE is maintained based on the information of the connection control table. This
information in the connection control table is managed by Storage Administrators via the
management console.
7.1.11 FMT_MSA.3
Storage Administrators set logical storage areas (objects) on a host computer basis and
initial settings of allowed operations. Default value before not being changed initially is
"no access allowed to any storage areas".
7.1.12 FMT_MTD.1
Table 7-3 shows permitted operations of TSF data for each administrator.
Table 7-3 Administrator roles and permitted operations of TSF data
Role TSF data Operation
Account
Administrator
(View and Modify)
User ID Change default, modify, delete
User password
(All users))
Change default, modify
User roles Change default, modify
Session timeout Modify
Account
Administrator
(View Only)
Own password Modify
Audit Log
Administrator
(View and Modify)
Audit trail Query
Own password Modify
Audit Log
Administrator
(View Only)
Audit trail Query
Own password Modify
Storage
Administrator (View
and Modify)
Host computer ID Change default, modify, delete
Own password Modify
42
Storage
Administrator (View
Only)
Own password Modify
7.1.13 FMT_REV.1
This requirement describes the function addressing the condition where the
authentication status is incorrectly fixed to “logged in” due to a failure in the TOE or its
IT environments, etc. Account Administrator (View and Modify) can forcibly change the
authentication status of the administrator to “logged out”.
7.1.14 FMT_SMF.1
Table 7-4 shows security management function mechanisms to be implemented for the
related SFRs.
Table 7-4 Security management function mechanisms
SFR Management function mechanism
FMT_MOF.1
Administrators who belong to the Audit Log Administrator (View and
Modify) group among identified and authenticated administrators can
enable/disable audit log data transfer to the Syslog server.
FMT_MSA.1
Administrators who belong to the Storage Administrator group among
identified and authenticated administrators can use the connection
control table to manage associations between each object (logical
storage area) and host computers. (The management function in
FMT_MSA.3 applies only when objects are generated.)
• Storage Administrator (View and Modify) can modify the above
setting.
FMT_MSA.3
Administrators who belong to the Storage Administrator (View and
Modify) group among identified and authenticated administrators can
populate the connection control table with the information between an
object and host computers and that defining logical storage area of the
object when objects are generated.
FMT_MTD.1
Administrators who have been identified and authenticated can
perform operations of the TSF data according to the assigned roles
defined in Table 7-3. No operations other than predetermined one are
allowed.
7.1.15 FMT_SMR.1
The TOE provides six role groups as roles of administrators: Account Administrator
(View and Modify), Account Administrator (View Only), Storage Administrator (View
and Modify), Storage Administrator (View Only), Audit Log Administrator (View and
Modify) and Audit Log Administrator (View Only). All the administrators are registered
in one or more groups.
43
7.1.16 FPT_STM.1
Time stamps are obtained from a low-level OS and added to audit data.
7.1.17 FRU_RSA.1
Three user roles are assigned Modify roles: Account Administrator (View and Modify),
Audit Log Administrator (View and Modify), and Storage Administrator (View and
Modify). The number of simultaneous logged-in administrators for each of these roles is
limited to “1”. The number of simultaneous logged-in administrators who have not the
Modify permission is not limited.
7.1.18 FTA_SSL.3
Each session of the logged-in administrator is managed to monitor how much period of
time operations are not performed via the management console. If the session timeout
value exceeds the upper limit the session of the user (administrator) is forcibly
terminated. The session timeout value can be initially set and/or changed by Account
Administrators (View and Modify).
44
8 Terms and definitions
8.1 CC-related
PP Protection Profile: A set of security requirements that is defined
as common specifications by procurement personnel or
developer industries of the TOE.
CC Common Criteria for Information Technology Security
Evaluation. The same contents of CC are also defined as
ISO/IEC 15408.
ST Security Target: A set of security requirements for each IT
product.
TOE Target of Evaluation; a product to be evaluated. The TOE can be
an entire IT product or part of the IT product. The scope of the
TOE is strictly defined in the ST.
8.2 TOE-related
Disk array A logical disk drive that consists of multiple disk drives
(generally, hard disks). Furthermore, some disk array systems
are able to divide a combined disk drive into logical disk drives
and assign them to different host computers. The TOE in this ST
is one of them.
Most of disk arrays are provided as devices independent of host
computers. Implementing RAID (Redundant Array of
Independent Disks) in the configuration improves the reliability
related to hardware failures. A very high capacity disk drive can
be realized by combining a large number of disk drives.
Managing host computers separately from disk drives
contributes to a higher maintainability.
SAN An acronym for Storage Area Network. A dedicated network for
connecting storage devices such as disk arrays to host
computers. It is recognized by host computers (OS that runs on
it) as local storage device directly connected it. It enables high
speed block level data transfer independent of OS on host
computers. The SCSI protocol is used for communicating
between host computers and storage devices. The conventional
SCSI specifications have a restriction of 320Mbps of bandwidth
and 25m of transmission length. Using FC (Fibre Channel),
which is applied to SAN, high-speed and long-length
transmission can be attained where bandwidth is 8Gbps and
transmission length is 100km (or more). Alternatively, Ethernet
45
and IP protocol are used instead of FC to configure SAN. iSCSI
(SCSI on IP network) is used as protocol in this case.
Host computer In this ST, users of disk array service provided by HUS are
called host computers. Interfaces with which HUS provides host
computers are independent of file systems, enabling various
OSs such as Windows, HP-UX, and Solaris to use disk array
resources of HUS. The same logical storage area (volume) can
be shared by host multiple computers that run on the same OS.