Certification Report
EAL 4+ Evaluation of Riverbed Steelhead Appliance v4.1
Issued by:
Communications Security Establishment Canada
Certification Body
Canadian Common Criteria Evaluation and Certification Scheme
© Government of Canada, Communications Security Establishment Canada, 2010
Document number: 383-4-107-CR
Version: 1.0
Date: 28 June 2010
Pagination: i to iii, 1 to 11
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DISCLAIMER
The Information Technology (IT) product identified in this certification report, and its
associated certificate, has been evaluated at an approved evaluation facility – established
under the Canadian Common Criteria Evaluation and Certification Scheme (CCS) – using
the Common Methodology for Information Technology Security Evaluation, Version 3.1
Revision 2, for conformance to the Common Criteria for Information Technology Security
Evaluation, Version 3.1 Revision 2. This certification report, and its associated certificate,
apply only to the identified version and release of the product in its evaluated configuration.
The evaluation has been conducted in accordance with the provisions of the CCS, and the
conclusions of the evaluation facility in the evaluation report are consistent with the evidence
adduced. This report, and its associated certificate, are not an endorsement of the IT product
by the Communications Security Establishment Canada, or any other organization that
recognizes or gives effect to this report, and its associated certificate, and no warranty for the
IT product by the Communications Security Establishment Canada, or any other organization
that recognizes or gives effect to this report, and its associated certificate, is either expressed
or implied.
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FOREWORD
The Canadian Common Criteria Evaluation and Certification Scheme (CCS) provides a
third-party evaluation service for determining the trustworthiness of Information Technology
(IT) security products. Evaluations are performed by a commercial Common Criteria
Evaluation Facility (CCEF) under the oversight of the CCS Certification Body, which is
managed by the Communications Security Establishment Canada.
A CCEF is a commercial facility that has been approved by the CCS Certification Body to
perform Common Criteria evaluations; a significant requirement for such approval is
accreditation to the requirements of ISO/IEC 17025:2005, the General Requirements for the
Competence of Testing and Calibration Laboratories. Accreditation is performed under the
Program for the Accreditation of Laboratories - Canada (PALCAN), administered by the
Standards Council of Canada.
The CCEF that carried out this evaluation is DOMUS IT Security Laboratory located in
Ottawa, Canada.
By awarding a Common Criteria certificate, the CCS Certification Body asserts that the
product complies with the security requirements specified in the associated security target. A
security target is a requirements specification document that defines the scope of the
evaluation activities. The consumer of certified IT products should review the security target,
in addition to this certification report, in order to gain an understanding of any assumptions
made during the evaluation, the IT product's intended environment, its security requirements,
and the level of confidence (i.e., the evaluation assurance level) that the product satisfies the
security requirements.
This certification report is associated with the certificate of product evaluation dated 28 June
2010, and the security target identified in Section 4 of this report.
The certification report, certificate of product evaluation and security target are posted on the
CCS Certified Products list (CPL) and the Common Criteria portal (the official website of
the Common Criteria Project).
This certification report makes reference to the following registered trademark:
• Linux is a registered trademark of Linus Torvalds.
Reproduction of this report is authorized provided the report is reproduced in its entirety.
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TABLE OF CONTENTS
Disclaimer....................................................................................................................................... i
Foreword........................................................................................................................................ii
Executive Summary...................................................................................................................... 1
1 Identification of Target of Evaluation ................................................................................ 2
2 TOE Description ................................................................................................................... 2
3 Evaluated Security Functionality........................................................................................ 3
4 Security Target...................................................................................................................... 4
5 Common Criteria Conformance.......................................................................................... 4
6 Security Policy....................................................................................................................... 4
7 Assumptions and Clarification of Scope............................................................................. 4
7.1 SECURE USAGE ASSUMPTIONS................................................................................... 4
7.2 ENVIRONMENTAL ASSUMPTIONS ............................................................................... 5
7.3 CLARIFICATION OF SCOPE.......................................................................................... 5
8 Evaluated Configuration...................................................................................................... 6
9 Documentation ...................................................................................................................... 7
10 Evaluation Analysis Activities ............................................................................................. 8
11 ITS Product Testing.............................................................................................................. 9
11.1 ASSESSMENT OF DEVELOPER TESTS .......................................................................... 9
11.2 INDEPENDENT FUNCTIONAL TESTING ...................................................................... 10
11.3 INDEPENDENT PENETRATION TESTING..................................................................... 10
11.4 CONDUCT OF TESTING ............................................................................................. 11
11.5 TESTING RESULTS.................................................................................................... 11
12 Results of the Evaluation.................................................................................................... 11
13 Evaluator Comments, Observations and Recommendations ......................................... 11
14 Acronyms, Abbreviations and Initializations................................................................... 12
15 References............................................................................................................................ 12
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Executive Summary
Riverbed Steelhead Appliance v4.1 (hereafter referred to as Steelhead Appliance v4.1), from
Riverbed Technology, Incorporated, is the Target of Evaluation for this Evaluation
Assurance Level (EAL) 4 augmented evaluation.
Steelhead Appliance v4.1 comprises a family of network appliance models that provides
Wide Area Network Optimization services including traffic acceleration, traffic quality of
service, and traffic protection. Steelhead Appliance v4.1 uses FIPS 140-2 validated
cryptography for traffic protection. Steelhead Appliance v4.1 evaluated models comprise the
520, 1020, 1520, 2020, 3020, 3520, 5520, 6020, 250, 550, 1050, 2050, 5050, and 6050.
DOMUS IT Security Laboratory is the CCEF that conducted the evaluation. This evaluation
was completed on 11 June 2010 and was carried out in accordance with the rules of the
Canadian Common Criteria Evaluation and Certification Scheme (CCS).
The scope of the evaluation is defined by the security target, which identifies assumptions
made during the evaluation, the intended environment for Steelhead Appliance, the security
requirements, and the level of confidence (evaluation assurance level) at which the product is
intended to satisfy the security requirements. Consumers are advised to verify that their
operating environment is consistent with that specified in the security target, and to give due
consideration to the comments, observations and recommendations in this certification
report.
The results documented in the Evaluation Technical Report (ETR)1
for this product provide
sufficient evidence that it meets the EAL 4 augmented assurance requirements for the
evaluated security functionality. The evaluation was conducted using the Common
Methodology for Information Technology Security Evaluation, Version 3.1 Revision 2, for
conformance to the Common Criteria for Information Technology Security Evaluation,
Version 3.1 Revision 2. The following augmentation is claimed: ALC_FLR.1 – Basic Flaw
Remediation.
Communications Security Establishment Canada, as the CCS Certification Body, declares
that Steelhead Appliance evaluation meets all the conditions of the Arrangement on the
Recognition of Common Criteria Certificates and that the product will be listed on the CCS
Certified Products List (CPL) and the Common Criteria portal (the official website of the
Common Criteria Project).
1
The ETR is a CCS document that contains information proprietary to the developer and/or the evaluator, and
is not releasable for public review.
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1 Identification of Target of Evaluation
The Target of Evaluation (TOE) for this Evaluation Assurance Level (EAL) 4 augmented
evaluation is Riverbed Steelhead Appliance v4.1 (hereafter referred to as Steelhead
Appliance v4.1), from Riverbed Technology, Incorporated.
2 TOE Description
The TOE comprises application software, a Linux based operating system, and a
cryptographic module running on the hardware appliances 520, 1020, 1520, 2020, 3020,
3520, 5520, 6020, 250, 550, 1050, 2050, 5050, and 6050.
Steelhead Appliance v4.1 is deployed in pairs as shown in Figure 1 below. A proprietary
Scalable Data Referencing (SDR) algorithm is applied to optimize traffic between
Appliances. Quality of service features may be used to prioritize network traffic and to set
minimum bandwidths for traffic requiring a constant data rate. Steelhead Appliance v4.1 uses
FIPS 140-2 validated cryptography for the protection of traffic exchanged between appliance
pairs, and between the appliances and the clients and servers communicating through
appliance pairs.
Figure 1 – Steelhead Appliance v4.1 Deployment
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3 Evaluated Security Functionality
The complete list of evaluated security functionality for Steelhead Appliance v4.1 is
identified in Section 7 of the Security Target (ST).
The following cryptographic modules were evaluated to the FIPS 140-2 standard:
Cryptographic Module Certificate #
Steelhead 520, Steelhead 1020, Steelhead 1520 and
Steelhead 2020 Appliances
Pending 2
Steelhead 5050 and 6050 Appliances Pending
Steelhead 3020, Steelhead 3520, Steelhead 5520 and
Steelhead 6020 Appliances
Pending
Steelhead 250 and Steelhead 550 Appliances Pending
Steelhead 1050 and Steelhead 2050 Appliances Pending
The following Government of Canada approved cryptographic algorithms were evaluated for
correct implementation in Steelhead Appliance v4.1:
Cryptographic Algorithm Standard Certificate #
Triple-DES (3DES) FIPS 46-3 #792
Advanced Encryption Standard (AES) FIPS 197 #1044
Rivest Shamir Adleman (RSA) FIPS 186-2 #498
Secure Hash Algorithm (SHA-1) FIPS 180-2 #994
Keyed-Hash Message Authentication
Code (HMAC)
FIPS 198 #586
Random Number Generation ANSI X9.31 #595
2
The cryptographic module is in the process of FIPS 140-2 validation under the Cryptographic Module
Validation Program (CMVP). Information regarding the status of the module validation can be found on the
NIST website.
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4 Security Target
The ST associated with this Certification Report is identified by the following nomenclature:
Title: Riverbed Technology, Inc. Steelhead Appliance v4.1 Security Target
Version: 0.8
Date: 11 June 2010
5 Common Criteria Conformance
The evaluation was conducted using the Common Methodology for Information Technology
Security Evaluation, Version 3.1 Revision 2, for conformance to the Common Criteria for
Information Technology Security Evaluation, Version 3.1 Revision 2.
Steelhead Appliance v4.1 is:
a. Common Criteria Part 2 extended with functional requirements based upon functional
components in Part 2, except for the following explicitly stated requirement defined in
the ST: FTC_ITC.1: Inter-TSF trusted communications channel.
b. Common Criteria Part 3 conformant, with security assurance requirements based only
upon assurance components in Part 3; and
c. Common Criteria EAL 4 augmented, containing all security assurance requirements in
the EAL 4 package, as well as the following: ALC_FLR.1 – Basic Flaw Remediation
6 Security Policy
Steelhead Appliance v4.1 implements an Administrative Access Policy that defines the rules
for access to administrative functions, a Quality of Service Policy that allows administrators
to prioritize network traffic giving certain network traffic priority over other traffic, and a
Wide Area Network (WAN) Optimization Policy that defines the rules for traffic
optimization and acceleration.
In addition, Steelhead Appliance v4.1 implements policies pertaining to security audit,
cryptographic support, user data protection, identification and authentication, security
management, protection of the TSF, TOE access, and trusted channels. Further details on
these security policies may be found in Section 1.4 of the ST.
7 Assumptions and Clarification of Scope
Consumers of Steelhead Appliance v4.1 should consider assumptions about usage and
environmental settings as requirements for the product’s installation and its operating
environment. This will ensure the proper and secure operation of the TOE.
7.1 Secure Usage Assumptions
The following Secure Usage Assumptions are listed in the ST:
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• It is assumed that there are one or more competent individuals assigned to manage the
TOE and the security of the information it contains; and
• It is assumed that the administrators who manage the TOE are not careless, negligent,
or willfully hostile, are appropriately trained, and follow all guidance.
7.2 Environmental Assumptions
The following Environmental Assumptions are listed in the ST:
• The TOE will be installed and configured at an appropriate point in the network
according to the appropriate installation guides;
• The TOE environment provides the network connectivity required to allow the TOE
to provide secure WAN optimization;
• The TOE is located within a controlled access facility and is physically available to
authorized administrators only;
• All ports needed for proper operation of the TOE will be opened at the firewall. Also,
any firewall settings necessary for the TOE's operation will be configured to allow
the TOE to operate;
• The TOE Environment will ensure that NTP information communicated from an NTP
source to the TOE cannot be modified by an attacker;
• The TOE Environment provides protection to ensure that log data, usage statistics,
configuration data, and email messages communicated between the TOE and an
administrator workstation cannot be viewed or modified by an attacker; and
• The TOE and the RADIUS or TACACS+ authentication server are located within the
same controlled access facility.
7.3 Clarification of Scope
Steelhead Appliance v4.1 does not optimize User Datagram Protocol (UDP) traffic, but does
apply quality of service rules to UDP traffic.
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8 Evaluated Configuration
The TOE comprises the application software 4.1.10-fips-b, the CentOS 4 distribution of
Linux, and a cryptographic module running on the hardware appliances 520, 1020, 1520,
2020, 3020, 3520, 5520, 6020, 250, 550, 1050, 2050, 5050, and 6050. There are fourteen
evaluated configurations as follows:
Hardware
Identifier
(Model)
Software
Identifier
Cryptographic Module TOE Identifier
520 4.1.10-fips-b Steelhead 520, Steelhead 1020,
Steelhead 1520 and Steelhead
2020 Appliances
520/4.1.10-fips-b
1020 4.1.10-fips-b Steelhead 520, Steelhead 1020,
Steelhead 1520 and Steelhead
2020 Appliances
1020/4.1.10-fips-b
1520 4.1.10-fips-b Steelhead 520, Steelhead 1020,
Steelhead 1520 and Steelhead
2020 Appliances
1520/4.1.10-fips-b
2020 4.1.10-fips-b Steelhead 520, Steelhead 1020,
Steelhead 1520 and Steelhead
2020 Appliances
2020/4.1.10-fips-b
3020 4.1.10-fips-b Steelhead 3020, Steelhead 3520,
Steelhead 5520 and Steelhead
6020 Appliances
3020/4.1.10-fips-b
3520 4.1.10-fips-b Steelhead 3020, Steelhead 3520,
Steelhead 5520 and Steelhead
6020 Appliances
3520/4.1.10-fips-b
5520 4.1.10-fips-b Steelhead 3020, Steelhead 3520,
Steelhead 5520 and Steelhead
6020 Appliances
5520/4.1.10-fips-b
6020 4.1.10-fips-b Steelhead 3020, Steelhead 3520,
Steelhead 5520 and Steelhead
6020 Appliances
6020/4.1.10-fips-b
250 4.1.10-fips-b Steelhead 250 and Steelhead 550 250/4.1.10-fips-b
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Hardware
Identifier
(Model)
Software
Identifier
Cryptographic Module TOE Identifier
Appliances
550 4.1.10-fips-b Steelhead 250 and Steelhead 550
Appliances
550/4.1.10-fips-b
1050 4.1.10-fips-b Steelhead 1050 and Steelhead
2050 Appliances
1050/4.1.10-fips-b
2050 4.1.10-fips-b Steelhead 1050 and Steelhead
2050 Appliances
2050/4.1.10-fips-b
5050 4.1.10-fips-b Steelhead 5050 and 6050
Appliances
5050/4.1.10-fips-b
6050 4.1.10-fips-b Steelhead 5050 and 6050
Appliances
6050/4.1.10-fips-b
The publication entitled FIPS/CC Administrator’s Guide 712-00047-01 describes the
procedures necessary to install and operate Steelhead Appliance v4.1 in its evaluated
configuration.
9 Documentation
The following documents are provided to the consumer:
• Riverbed Technology, Inc. Steelhead Appliance v4.1 Security Target v0.8;
• Riverbed Command-Line Interface Reference Manual 720-00002 (PUB-00003);
• Hardware Owner’s Manual 720-00101 (PUB-00050);
• Maintenance Guide 710-00016 (PUB-00044);
• Riverbed Steelhead Management Console User’s Guide 720-00001 (PUB-00001);
• Safety and Compliance Guide 710-00004 (PUB-00009);
• Riverbed Steelhead Appliance Deployment Guide 720-00006 (PUB-00018);
• Riverbed Getting Started Guide 710-00102 (PUB-00048);
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• Riverbed Steelhead Appliance Installation and Configuration Guide 710-00001
(PUB-00002);
• Rack Installation Guide (Steelhead Series 3000,5000, and 6000, and Interceptor2
Systems) 710-00010 (PUB-00033);
• Bypass Card Installation Guide 710-00018 (PUB-00026);
• Riverbed SSL Administrators guide v.4.1 February 2008 part number 712-0030-01;
and
• FIPS/CC Administrator’s Guide 712-00047-01.
10 Evaluation Analysis Activities
The evaluation analysis activities involved a structured evaluation of Steelhead Appliance
v4.1, including the following areas:
Development: The evaluators analyzed the Steelhead Appliance v4.1 functional
specification, design documentation, and a subset of the implementation representation; they
determined that the design accurately describes the TOE security functionality (TSF)
interfaces and the TSF subsystems and modules, and how the TSF implements the security
functional requirements (SFRs). The evaluators analyzed the Steelhead Appliance security
architectural description and determined that the initialization process is secure and that the
security functions are protected against tamper and bypass. The evaluators also
independently verified that the correspondence mappings between the design documents are
correct.
Guidance Documents: The evaluators examined the Steelhead Appliance v4.1 preparative
user guidance and operational user guidance and determined that it sufficiently and
unambiguously describes how to securely transform the TOE into its evaluated configuration
and how to use and administer the product. The evaluators examined and tested the
preparative and operational guidance, and determined that they are complete and sufficiently
detailed to result in a secure configuration.
Life-cycle support: An analysis of the Steelhead Appliance v4.1 configuration management
system and associated documentation was performed. The evaluators found that the
Steelhead Appliance v4.1 configuration items were clearly marked and could be modified
and controlled by automated tools. The developer’s configuration management system was
observed during a site visit, and it was found to be mature and well developed and operated
in accordance with the CM plan. The evaluators confirmed that the access control measures
as described in the CM plan are effective in preventing unauthorised access to the
configuration items.
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The evaluators examined the delivery documentation and determined that it described all of
the procedures required to maintain the integrity of Steelhead Appliance v4.1 during
distribution to the consumer.
The evaluators examined the development security procedures during a site visit and
determined that they detailed sufficient security measures for the development environment
to protect the confidentiality and integrity of the Steelhead Appliance v4.1 design and
implementation. The evaluators determined that the developer has used a documented model
of the TOE life-cycle and well-defined development tools that yield consistent and
predictable results.
The evaluators reviewed the flaw remediation procedures used by Riverbed Technology,
Incorporated for Steelhead Appliance v4.1. During a site visit, the evaluators also examined
the evidence generated by adherence to the procedures. The evaluators concluded that the
procedures are adequate to track and correct security flaws, and distribute the flaw
information and corrections to consumers of the product.
Vulnerability Assessment: The evaluators conducted an independent vulnerability analysis
of Steelhead Appliance v4.1. Additionally, the evaluators conducted a review of public
domain vulnerability databases and a focused search of all evaluation deliverables. The
evaluators identified potential vulnerabilities for testing applicable to the Steelhead
Appliance in its operational environment.
All these evaluation activities resulted in PASS verdicts.
11 ITS Product Testing
Testing at EAL 4 consists of the following three steps: assessing developer tests, performing
independent functional tests, and performing penetration tests.
11.1 Assessment of Developer Tests
The evaluators verified that the developer has met their testing responsibilities by examining
their test evidence, and reviewing their test results, as documented in the ETR3
.
The evaluators analyzed the developer’s test coverage and depth analysis and found them to
be complete and accurate. The correspondence between the tests identified in the developer’s
test documentation and the functional specification, TOE design and security architecture
description was complete.
3
The ETR is a CCS document that contains information proprietary to the developer and/or the evaluator, and
is not releasable for public review.
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11.2 Independent Functional Testing
During this evaluation, the evaluator developed independent functional tests by examining
design and guidance documentation, examining the developer's test documentation,
executing a sample of the developer's test cases, and creating test cases that augmented the
developer tests.
All testing was planned and documented to a sufficient level of detail to allow repeatability
of the testing procedures and results. Resulting from this test coverage approach was the
following list of DOMUS IT Security Laboratory test goals:
a. Repeat of Developer's Tests: The evaluator repeated all the developer tests to gain a
deeper understanding of the TOE and its interfaces. All security functions and interfaces
were exercised.
b. User Data Protection: The objective of this test goal is to determine the TOE's ability to
protect user data;
c. Identification and Authentication: The objective of these tests is to ensure that access to
the TOE is restricted to authorized administrators only;
d. Security Management: The objective of these tests is to ensure that authorized individuals
are able to manage the TOE in a secure manner; and
e. Protection of the TSF: The objective of this test is to ensure that the TOE can be
configured to reflect the correct time settings.
11.3 Independent Penetration Testing
Subsequent to the independent review of public domain vulnerability databases and a
focused review of all evaluation deliverables, limited independent evaluator penetration
testing was conducted. The penetration tests focused on:
• Reconnaissance and exploratory testing to observe application behavior using
Firecookie and Wireshark;
• Use of automated vulnerability scanning tools (NESSUS and NMAP) to discover
potential network, platform and application layer vulnerabilities;
• Use of automated SQL injection tools (WEBSCARAB) to determine SQL injection
vulnerabilities;
• Capture and analysis of session ID cookies to determine susceptibility to prediction;
and
• Attempts to bypass authentication and authorization controls.
The independent penetration testing did not uncover any exploitable vulnerabilities in the
anticipated operating environment.
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11.4 Conduct of Testing
Steelhead Appliance v4.1 was subjected to a comprehensive suite of formally documented,
independent functional and penetration tests. The testing took place at the Information
Technology Security Evaluation and Test (ITSET) Facility at DOMUS IT Security
Laboratory. The CCS Certification Body witnessed a portion of the independent testing. The
detailed testing activities, including configurations, procedures, test cases, expected results
and observed results are documented in a separate Test Results document.
11.5 Testing Results
The developer’s tests and the independent functional tests yielded the expected results,
giving assurance that Steelhead Appliance v4.1 behaves as specified in its ST, functional
specification, TOE design and security architecture description.
12 Results of the Evaluation
This evaluation has provided the basis for an EAL 4+ level of assurance. The overall verdict
for the evaluation is PASS. These results are supported by evidence in the ETR.
13 Evaluator Comments, Observations and Recommendations
Consumers should review the security aspects of the intended environment (defined in
Section 3.3 of the ST) and the functionality excluded from evaluation (detailed in Section
1.4.5 of the ST) when deploying Steelhead Appliance v4.1.
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14 Acronyms, Abbreviations and Initializations
Acronym/Abbreviation/
Initialization
Description
CCEF Common Criteria Evaluation Facility
CCS Canadian Common Criteria Evaluation and
Certification Scheme
CPL Certified Products list
CM Configuration Management
EAL Evaluation Assurance Level
ETR Evaluation Technical Report
IT Information Technology
ITSET Information Technology Security Evaluation
and Testing
NTP Network Time Protocol
PALCAN Program for the Accreditation of Laboratories
- Canada
RADIUS Remote Authentication Dial In User Service
SDR Scalable Data Referencing
ST Security Target
TACACS+ Terminal Access Controller Access-Control
System Plus
TOE Target of Evaluation
UDP User Datagram Protocol
WAN Wide Area Network
WDS Wide Area Data Services
15 References
This section lists all documentation used as source material for this report:
a. CCS Publication #4, Technical Oversight, Version 1.1, August 2005.
b. Common Criteria for Information Technology Security Evaluation, Version 3.1
Revision 2, September 2007.
c. Common Methodology for Information Technology Security Evaluation, CEM,
Version 3.1 Revision 2, September 2007.
d. Riverbed Technology, Inc. Steelhead Appliance v4.1 Security Target, v0.8, June 11,
2010.
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e. Evaluation Technical Report Version 1.2 Riverbed Technology, Inc. Steelhead
Appliance v4.1, June 11, 2010.