National Information Assurance Partnership Common Criteria Evaluation and Validation Scheme Validation Report for the Apple IOS 11 Safari on iPhone and iPad Report Number: CCEVS-VR-VID10916-2018 Dated: November 9, 2018 Version: 1.0 National Institute of Standards and Technology National Security Agency Information Technology Laboratory Information Assurance Directorate 100 Bureau Drive 9800 Savage Road STE 6940 Gaithersburg, MD 20899 Fort George G. Meade, MD 20755-6940 ® TM 2 ACKNOWLEDGEMENTS Validation Team Sheldon Durrant Michelle Carlson The MITRE Corporation Kenneth Stutterheim The Aerospace Corporation Common Criteria Testing Laboratory Anthony Busciglio Rutwij Kulkarni Danielle F Canoles Acumen Security, LLC 3 Table of Contents 1 Executive Summary............................................................................................................... 4 2 Identification.......................................................................................................................... 5 3 Architectural Information .................................................................................................... 6 4 Security Policy........................................................................................................................ 7 4.1 Cryptographic Support..................................................................................................................................7 4.2 User Data Protection ......................................................................................................................................7 4.3 Identification and Authentication .................................................................................................................7 4.4 Security Management ....................................................................................................................................7 4.5 Privacy.............................................................................................................................................................7 4.6 Protection of the TSF .....................................................................................................................................7 4.7 Trusted Path/Channels ..................................................................................................................................8 5 Assumptions, Threats & Clarification of Scope ................................................................. 9 5.1 Assumptions....................................................................................................................................................9 5.2 Threats.............................................................................................................................................................9 5.3 Clarification of Scope...................................................................................................................................10 6 Documentation..................................................................................................................... 11 7 TOE Evaluated Configuration ........................................................................................... 12 7.1 Evaluated Configuration..............................................................................................................................12 8 IT Product Testing............................................................................................................... 14 8.1 Developer Testing .........................................................................................................................................14 8.2 Evaluation Team Independent Testing.......................................................................................................14 8.3 Test Bed.........................................................................................................................................................14 8.4 Test Tools ......................................................................................................................................................14 9 Results of the Evaluation .................................................................................................... 16 9.1 Evaluation of Security Target .....................................................................................................................16 9.2 Evaluation of Development Documentation...............................................................................................16 9.3 Evaluation of Guidance Documents............................................................................................................16 9.4 Evaluation of Life Cycle Support Activities...............................................................................................17 9.5 Evaluation of Test Documentation and the Test Activity .........................................................................17 9.6 Vulnerability Assessment Activity ..............................................................................................................17 9.7 Summary of Evaluation Results..................................................................................................................18 10 Validator Comments & Recommendations ...................................................................... 19 11 Annexes................................................................................................................................. 20 12 Security Target .................................................................................................................... 21 13 Glossary ................................................................................................................................ 22 14 Bibliography......................................................................................................................... 23 4 1 Executive Summary This Validation Report (VR) is intended to assist the end user of this product and any security certification Agent for that end user in determining the suitability of this Information Technology (IT) product for their environment. End users should review the Security Target (ST), which is where specific security claims are made, in conjunction with this VR, which describes how those security claims were tested and evaluated and any restrictions on the evaluated configuration. Prospective users should carefully read the Assumptions, Threats, & Clarification of Scope in Section 5 and the Validator Comments & Recommendations in Section 10, where any restrictions on the evaluated configuration are highlighted. This report documents the National Information Assurance Partnership (NIAP) assessment of the evaluation of the Apple IOS 11 Safari Target of Evaluation (TOE). It presents the evaluation results, their justifications, and the conformance results. This VR is not an endorsement of the TOE by any agency of the U.S. Government and no warranty of the TOE is either expressed or implied. This VR applies only to the specific version and configuration of the product as evaluated and documented in the ST. The evaluation was completed by Acumen Security in October 2018. The information in this report is largely derived from the proprietary Evaluation Technical Report (ETR) and associated test report, all written by Acumen Security and summarized in the publicly available Common Criteria SWAPP and WEBBROWSEREP Assurance Activity Report Apple IOS 11 Safari, Version 0.5, November, 2018. The evaluation determined that the product is both Common Criteria Part 2 Extended and Part 3 Conformant, and meets the assurance requirements defined in the Protection Profile for Application Software, version 1.2, dated, 22 April 2016 [SWAPP] and Extended Package for Web Browsers, version 2.0, dated 16 June 2015 [WEBBROWSEREP]. The Target of Evaluation (TOE) identified in this Validation Report has been evaluated at a NIAP approved Common Criteria Testing Laboratory using the Common Methodology for IT Security Evaluation (Version 3.1, Rev. 4) for conformance to the Common Criteria for IT Security Evaluation (Version 3.1, Rev. 4), as interpreted by the Assurance Activities contained in the Protection Profile for Application Software, version 1.2, dated, 22 April 2016 [SWAPP] and Extended Package for Web Browsers, version 2.0, dated 16 June 2015 [WEBBROWSEREP] in addition to all applicable NIAP technical decisions for the technology. This Validation Report applies only to the specific version of the TOE as evaluated. The evaluation has been conducted in accordance with the provisions of the NIAP Common Criteria Evaluation and Validation Scheme and the conclusions of the testing laboratory in the evaluation technical report are consistent with the evidence provided. The validation team provided guidance on technical issues and evaluation processes and reviewed the individual work units documented in the ETR and the Assurance Activities Report (AAR). The validation team found that the evaluation showed that the product satisfies all of the functional requirements and assurance requirements stated in the Security Target (ST). Based on these findings, the validation team concludes that the testing laboratory's findings are accurate, the conclusions justified, and the conformance results are correct. The conclusions of the testing laboratory in the evaluation technical report are consistent with the evidence produced. 5 2 Identification The CCEVS is a joint National Security Agency (NSA) and National Institute of Standards and Technology effort to establish commercial facilities to perform trusted product evaluations. Under this program, security evaluations are conducted by commercial testing laboratories called Common Criteria Testing Laboratories (CCTLs). CCTLs evaluate products against Protection Profiles containing Assurance Activities, which are interpretation of CEM work units specific to the technology described by the PP. The NIAP Validation Body assigns Validators to monitor the CCTLs to ensure quality and consistency across evaluations. Developers of information technology products desiring a security evaluation contract with a CCTL and pay a fee for their product's evaluation. Upon successful completion of the evaluation, the product is added to NIAP's Product Compliance List. The target of evaluation is the Apple IOS 11 Safari web browser, and the associated TOE guidance documentation. Table 1 provides information needed to completely identify the product, including:  The Target of Evaluation (TOE): the fully qualified identifier of the product as evaluated.  The Security Target (ST), describing the security features, claims, and assurances of the product.  The conformance result of the evaluation.  The Protection Profile(s) to which the product is conformant.  The organizations and individuals participating in the evaluation. Table 1 - Identification Item Identifier Evaluation Scheme United States NIAP Common Criteria Evaluation and Validation Scheme TOE Apple iOS 11 Safari on iPhone and iPad Protection Profile Protection Profile for Application Software, version 1.2, dated 22 April 2016 Application Software Extended Package for Web Browsers, version 2.0, dated 16 June 2015 Security Target Apple iOS 11 Safari Security Target Version 1.0 Evaluation Technical Report VID10916 Assurance Activity Report CC Version Version 3.1, Revision 4 Conformance Result CC Part 2 Extended and CC Part 3 Extended Sponsor Apple Inc. Developer Apple Inc. Common Criteria Testing Lab (CCTL) Acumen Security Rockville, MD CCEVS Validators Michelle Carlson, Sheldon Durrant, Kenneth Stutterheim 6 3 Architectural Information Note: The following architectural description is based on the description presented in the Security Target. The TOE is the Apple iOS Safari application which runs on iPad and iPhone devices. The product provides access to HTTPS/TLS connections via a browser for user connectivity. The TOE is the Safari software only. The Apple iOS operating system has been separately validated (VID 10851). The TOE is an application on a mobile operating system. The mobile operating system and hardware platforms are part of the TOE environment. The evaluated version of the TOE is version 11. 7 4 Security Policy The TOE is comprised of several security features, as identified below.  Cryptography Support  User Data Protection  Identification and Authentication  Security Management  Privacy  Protection of the TSF  Trusted Path/Channels The TOE provides the security functionality required by [SWAPP] and [WEBBROWSEREP]. 4.1 Cryptographic Support The TOE provides TLS/HTTPS connectivity for users attempting to communicate with secure URLs. The TOE does not directly perform any cryptographic functions. The TOE invokes the iOS platform cryptography for secure credential storage. 4.2 User Data Protection The TOE requests access to network connectivity, camera, microphone, location services, and address book, and communicates with the wireless network when invoked by the user. The TOE runs inside of a sandbox where each browser tab is isolated. In addition, the TOE supports the ‘secure’ attribute and blocking of third-party cookies. 4.3 Identification and Authentication All validation of X.509 certificates is performed by the iOS platform that supports the TOE. 4.4 Security Management The TOE platform provides the ability to configure the TOE. No credentials are installed by default. 4.5 Privacy If the user logs into iCloud Account on two or more devices, the TOE permits two devices within Bluetooth range of each other to automatically “continue” browsing with the same URL provided via iCloud. Examples of this include the use of “allow sending diagnostic and usage data to Apple” or “Allow modifying diagnostic settings”. This does not send PII, but can be misunderstood as sending identifiable data. The TOE will transmit contact information at the request of a user. The TOE provides a notification when sharing this information. 4.6 Protection of the TSF The TOE does not permit automatic downloads. All downloads are at the request of a user and require approval. The TOE does not support add-ons. The only supported mobile code is signed JavaScript. No 8 third-party libraries are leveraged by the TOE. The TOE platform verifies all software updates via digital signature. 4.7 Trusted Path/Channels The TOE is a software application. The TOE has the ability to establish HTTPS/TLS protected communications. 9 5 Assumptions, Threats & Clarification of Scope 5.1 Assumptions The specific conditions listed in the following subsections are assumed to exist in the TOE’s environment. These assumptions include both practical realities in the development of the TOE security requirements and the essential environmental conditions on the use of the TOE. Table 2 - Assumptions Assumption Assumption Definition A.PLATFORM The TOE relies upon a trustworthy computing platform for its execution. This includes the underlying platform and whatever runtime environment it provides to the TOE. A.PROPER_USER The user of the application software is not willfully negligent or hostile, and uses the software in compliance with the applied enterprise security policy. A.PROPER_ADMIN The administrator of the application software is not careless, willfully negligent or hostile, and administers the software within compliance of the applied enterprise security policy. 5.2 Threats The following table lists the threats addressed by the TOE and the IT Environment. The assumed level of expertise of the attacker for all the threats identified below is Enhanced-Basic. Table 3 - Threats Threat Threat Definition T.NETWORK_ATTACK An attacker is positioned on a communications channel or elsewhere on the network infrastructure. Attackers may engage in communications with the application software or alter communications between the application software and other endpoints in order to compromise it. T.NETWORK_EAVESDROP An attacker is positioned on a communications channel or elsewhere on the network infrastructure. Attackers may monitor and gain access to data exchanged between the application and other endpoints. T.LOCAL_ATTACK An attacker can act through unprivileged software on the same computing platform on which the application executes. Attackers may provide maliciously formatted input to the application in the form of files or other local communications. T.PHYSICAL_ACCESS An attacker may try to access sensitive data at rest. T.FLAWED_ADDON Web browser functionality can be extended through the integration of third-party utilities and tools. Malicious or vulnerable add-ons could result in attacks against the system. Such attacks can allow unauthorized access to sensitive information in the browser, unauthorized access to the platform's file system, or even privilege escalation that enables unauthorized access to other applications or the operating system. 10 Threat Threat Definition T.SAME-ORIGIN_VIOLATION Violating the same-origin policy is a specialized type of network attack (covered generally as T.NETWORK_ATTACK in the App PP) which involves web content violating access control policies enforced by a web browser to separate the content of different web domains. It is specifically identified as a threat to web browsers, since they implement the access control policies that are violated in these attacks. Attacks which involve same origin violations include:  Insufficient protection of session tokens can lead to session hijacking, where a token is captured and reused in order to gain the privileges of the user who initiated the session.  Cross-site scripting (XSS) and Cross-Site Request Forgery (CSRF) attacks are methods used to compromise user credentials (usually by stealing the user's session token) to a web site. These attacks are more likely a result of server security problems, but some browsers incorporate technologies that try to detect the attacks.  Inadequate sandboxing of browser windows/tabs or a faulty cross domain communications model can lead to leakage of content from one domain in one window/tab to a different domain in a different window/tab. Such attacks leverage the ability of browsers to display content from multiple domains simultaneously. 5.3 Clarification of Scope All evaluations (and all products) have limitations, as well as potential misconceptions that need clarifying. This text covers some of the more important limitations and clarifications of this evaluation. Note that:  As with any evaluation, this evaluation only shows that the evaluated configuration meets the security claims made with a certain level of assurance. The level of assurance for this evaluation is defined within the Protection Profile for Application Software, version 1.2, dated 22 April 2016 [SWAPP] and the Application Software Extended Package for Web Browsers, version 2.0, dated 16 June 2015 [WEBBROWSEREP].  Consistent with the expectations of the Protection Profile, this evaluation did not specifically search for, nor seriously attempt to counter, vulnerabilities that were not “obvious” or vulnerabilities to objectives not claimed in the ST. The CEM defines an “obvious” vulnerability as one that is easily exploited with a minimum of understanding of the TOE, technical sophistication and resources.  The evaluation of security functionality of the product was limited to the functionality specified in the claimed Protection Profiles and any applicable Technical Decisions. Any additional security related functional capabilities that may be included in the product were not covered by this evaluation. 11 6 Documentation The following documents were provided by the vendor with the TOE for evaluation:  Apple iOS 11 Safari Security Target, Version 1.0 [ST]  Apple iOS 11 Safari on iPhone and iPad Common Criteria Configuration Guide, Version 1.2 [AGD] Any additional customer documentation provided with the product, or that is available online was not included in the scope of the evaluation and therefore should not to be relied upon when configuring or operating the device as evaluated. To use the product in the evaluated configuration, the product must be configured as specified in that guide. Consumers are encouraged to download the CC configuration guide from the NIAP website to ensure the device is configured as evaluated. 12 7 TOE Evaluated Configuration 7.1 Evaluated Configuration The TOE is an application on a mobile operating system. The TOE is the Safari browser application only. The Apple iOS operating system has been separately validated (VID 10851). The mobile operating system and hardware platforms are part of the TOE environment. The evaluated version of the TOE is version 11. As evaluated, the TOE software runs on the following devices: Table 4 Hardware Devices Device Name Model Processor WiFi Bluetooth iPhone X A1901 A1902 A1865 A11 802.11a/b/g/n/ac 802.11a/b/g/n/ac 802.11a/b/g/n/ac 5.0 iPhone 8 Plus/ iPhone 8 A1864, A1897, A1898, A1899/ A1863, A1905, A1906, A1907 A11 802.11a/b/g/n/ac 802.11a/b/g/n/ac 5.0 iPhone 7 Plus/ iPhone 7 A1661, A1784, A1785, A1786/ A1660, A1778, A1779, A1780 A10 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 iPhone 6S Plus/ iPhone 6S A1634, A1687, A1690, A1699/ A1633, A1688, A1691, A1700 A9 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 iPhone SE A1662 A1723 A1724 A9 802.11a/b/g/n/ac 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 iPhone 6 Plus/ iPhone 6 A1522, A1524, A1593/ A1549, A1586, A1589 A8 802.11a/b/g/n/ac 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.0 4.0 4.0 iPhone 5s A1453 A1457 A1518 A1528 A1530 A1533 A7 802.11a/b/g/n 802.11a/b/g/n 802.11a/b/g/n 802.11a/b/g/n 802.11a/b/g/n 802.11a/b/g/n 4.0 4.0 4.0 4.0 4.0 4.0 iPad mini 3 A1599 A1600 A1601 A7 802.11a/b/g/n 802.11a/b/g/n 802.11a/b/g/n 4.0 4.0 4.0 iPad mini 4 A1538 A1550 A8 802.11a/b/g/n 802.11a/b/g/n 4.2 4.2 iPad Air 2 A1566 A1567 A8X 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 iPad (5th gen) A1822 A1823 A9X 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 iPad Pro 12.9” (1st Gen) A1584 A1652 A9X 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 iPad Pro 9.7” A1673 A1674 A9X 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 iPad Pro 12.9” (2nd Gen) A1670 A1671 A10X 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 iPad Pro 10.5” A1701 A1709 A10X 802.11a/b/g/n/ac 802.11a/b/g/n/ac 4.2 4.2 13 Device Name Model Processor WiFi Bluetooth iPad 9.7” A1893 A1954 A10 802.11a/b/g/n/ac 4.2 14 8 IT Product Testing This section describes the testing efforts of the developer and the evaluation team. It is derived from information contained in the Apple iOS 11 Safari Evaluation Test Report, version 1.3 [ETR], which is not publicly available. The Common Criteria SWAPP and WEBBROWSEREP Assurance Activity Report Apple iOS 11 Safari, Version 0.5 [AAR] provides an overview of testing and the prescribed assurance activities. 8.1 Developer Testing No evidence of developer testing is required in the Assurance Activities for this product. 8.2 Evaluation Team Independent Testing The evaluation team verified the product according the vendor-provided guidance documentation and ran the tests specified in the Protection Profile for Application Software, version 1.2, dated 22 April 2016 [SWAPP], and the Application Software Extended Package for Web Browsers, version 2.0, dated 16 June 2015 [WEBBROWSEREP]. The Independent Testing activity is documented in the Assurance Activities Report, which is publicly available and is not duplicated here. Multiple test beds were constructed to exercise Application Software capabilities and claimed security functionality across device types and processors. 8.3 Test Bed Full testing was performed across the following devices and processors to ensure adequate coverage:  iPhone 5s A7  iPhone 6 Plus A8  iPad Air 2 A8X  iPhone 6S Plus A9  iPad Pro 9.7 A9X  iPhone 7 A10  iPad Pro A10X  iPhone 8 Plus A11 8.4 Test Tools  nmap version 7.70  Wireshark 2.6.1 15  SSH version OpenSSH_7.6p1  QuickTime Player (for Video Recording) version 10.4 [Platform: MAC]  Burpsuite 1.7.35  Custom script for FPT_TUD_EXT.1.4 Test #1 (shasumfiles.sh)  Custom script for FPT_DNL_EXT.1.2 Test#1 (File Download)  Custom tool for FDP_STR_EXT.1.1 Test#1 and Test#2 (Secure and No Secure Cookie)  Web Inspector v11 [Platform: iOS] [Web Inspector is built-in with iOS11]  Apple Configurator 2 [Platform: MAC] Note that platform-based requirements testing leveraged the testing that had been previously vetted and approved as part of VID10851. Those VID10851 iOS 11 tests were run against the same models and processors as noted above. 16 9 Results of the Evaluation The results of the assurance requirements are generally described in this section and are presented in detail in the proprietary documents: the Detailed Test Reports [DTR] and the Apple iOS 11 Safari Evaluation Test Report, version 1.3 [ETR] and as summarized in the Common Criteria SWAPP and WEBBROWSEREP Assurance Activity Report Apple iOS 11 Safari, Version 0.5 [AAR]. The reader of this document can assume that activities and work units received a passing verdict. A verdict for an assurance component is determined by the resulting verdicts assigned to the corresponding evaluator action elements. The evaluation was conducted based upon CC version 3.1 rev 4 and CEM version 3.1 rev 4. The evaluation determined the Apple iOS 11 Safari on iPhone and iPad to be Part 2 extended, and meets the SARs contained in the PP. Additionally the evaluator performed the Assurance Activities specified in the [SWAPP] and [WEBBROWSEREP]. 9.1 Evaluation of Security Target The evaluation team applied each ASE CEM work unit. The ST evaluation ensured the ST contains a description of the environment in terms of policies and assumptions, a statement of security requirements claimed to be met by the Apple IOS 11 Safari on iPhone and iPad that are consistent with the Common Criteria, and product security function descriptions that support the requirements. Additionally, the evaluator performed an assessment of the Assurance Activities specified in the Protection Profile for Application Software, version 1.2, dated, 22 April 2016 [SWAPP] and Extended Package for Web Browsers, version 2.0, dated 16 June 2015 [WEBBROWSEREP]. The validators reviewed the work of the evaluation team, and found that sufficient evidence and justification was provided by the evaluation team to confirm that the evaluation was conducted in accordance with the requirements of the CEM, and that the conclusion reached by the evaluation team was justified. 9.2 Evaluation of Development Documentation The evaluation team assessed the design documentation and found it adequate to aid in understanding how the TSF provides the security functions. The design documentation consists of a functional specification contained in the Security Target's TOE Summary Specification. Additionally, the evaluator performed the Assurance Activities specified in the [SWAPP] and [WEBBROWSEREP] related to the examination of the information contained in the TOE Summary Specification. The validators reviewed the work of the evaluation team, and found that sufficient evidence and justification was provided by the evaluation team to confirm that the evaluation was conducted in accordance with the Assurance Activities, and that the conclusion reached by the evaluation team was justified. 9.3 Evaluation of Guidance Documents The evaluation team ensured the adequacy of the user guidance in describing how to use the operational TOE. Additionally, the evaluation team ensured the adequacy of the administrator guidance in describing how to securely administer the TOE. The guides were assessed during the design and testing phases of the evaluation to ensure they were complete. Additionally, the evaluator performed 17 the Assurance Activities specified in the [SWAPP] and [WEBBROWSEREP] related to the examination of the information contained in the operational guidance documents. The validators reviewed the work of the evaluation team, and found that sufficient evidence and justification was provided by the evaluation team to confirm that the evaluation was conducted in accordance with the Assurance Activities, and that the conclusion reached by the evaluation team was justified. 9.4 Evaluation of Life Cycle Support Activities The evaluation team found that the TOE was identified. Additionally, the team verified that both the TOE and its supporting documentation consistently reference the same version and use the same nomenclature. The evaluation team also verified that the vendor website identified the TOE version accurately. The validators reviewed the work of the evaluation team, and found that sufficient evidence and justification was provided by the evaluation team to confirm that the evaluation was conducted in accordance with the requirements of the CEM, and that the conclusion reached by the evaluation team was justified. 9.5 Evaluation of Test Documentation and the Test Activity The evaluation team ran the set of tests specified by the Assurance Activities in the [SWAPP] and [WEBBROWSEREP] and recorded the results in a Test Report, summarized in the Evaluation Technical Report and Assurance Activities Report. The validators reviewed the work of the evaluation team, and found that sufficient evidence was provided by the evaluation team to show that the evaluation activities addressed the test activities in the [SWAPP] and [WEBBROWSEREP], and that the conclusion reached by the evaluation team was justified. 9.6 Vulnerability Assessment Activity The evaluation team performed a public search for vulnerabilities, performed vulnerability testing and did not discover any issues with the TOE. The following sources of public vulnerability information were searched on November 8, 2018:  http://nvd.nist.gov  http://www.us-cert.gov  http://www.securityfocus.com  http://cve.mitre.org The search terms used included:  Apple iOS Safari  Apple Framework  Safari 18  Apple iOS 11  Apple CoreCrypto Kernel Module  Apple CoreCrypto Module The validators reviewed the work of the evaluation team, and found that sufficient evidence and justification was provided by the evaluation team to confirm that the evaluation addressed the vulnerability analysis Assurance Activities in the [SWAPP] and [WEBBROWSEREP], and that the conclusion reached by the evaluation team was justified. 9.7 Summary of Evaluation Results The evaluation team's assessment of the evaluation evidence demonstrates that the claims in the ST are met. Additionally, the evaluation team's test activities also demonstrated the accuracy of the claims in the ST. The validation team's assessment of the evidence provided by the evaluation team is that it demonstrates that the evaluation team performed the Assurance Activities in the [SWAPP] and [WEBBROWSEREP], and correctly verified that the product meets the claims in the ST. 19 10 Validator Comments & Recommendations 20 11 Annexes Not applicable. 21 12 Security Target Please see the Apple iOS 11 Safari Security Target, Version 1.0 [ST]. 22 13 Glossary The following definitions are used throughout this document:  Common Criteria Testing Laboratory (CCTL). An IT security evaluation facility accredited by the National Voluntary Laboratory Accreditation Program (NVLAP) and approved by the CCEVS Validation Body to conduct Common Criteria-based evaluations.  Conformance. The ability to demonstrate in an unambiguous way that a given implementation is correct with respect to the formal model.  Evaluation. The assessment of an IT product against the Common Criteria using the Common Criteria Evaluation Methodology to determine whether or not the claims made are justified; or the assessment of a protection profile against the Common Criteria using the Common Evaluation Methodology to determine if the Profile is complete, consistent, technically sound and hence suitable for use as a statement of requirements for one or more TOEs that may be evaluated.  Evaluation Evidence. Any tangible resource (information) required from the sponsor or developer by the evaluator to perform one or more evaluation activities.  Feature. Part of a product that is either included with the product or can be ordered separately.  Target of Evaluation (TOE). A group of IT products configured as an IT system, or an IT product, and associated documentation that is the subject of a security evaluation under the CC.  Validation. The process carried out by the CCEVS Validation Body leading to the issuance of a Common Criteria certificate.  Validation Body. A governmental organization responsible for carrying out validation and for overseeing the day-to-day operation of the NIAP Common Criteria Evaluation and Validation Scheme. 23 14 Bibliography The Validation Team used the following documents to produce this Validation Report:  Common Criteria for Information Technology Security Evaluation - Part 1: Introduction and general model, Version 3.1 Revision 4.  Common Criteria for Information Technology Security Evaluation - Part 2: Security functional requirements, Version 3.1 Revision 4.  Common Criteria for Information Technology Security Evaluation - Part 3: Security assurance requirements, Version 3.1 Revision 4.  Common Evaluation Methodology for Information Technology Security Evaluation, Version 3.1 Revision 4.  Protection Profile for Application Software, Version 1.2, dated 22 April 2016 [SWAPP]  Extended Package for Web Browsers, Version 2.0, dated 16 June 2015 [WEBBROWSEREP]  Apple iOS 11 Safari Security Target, Version 1.0, November 2018 [ST]  Common Criteria SWAPP and WEBBROWSEREP Assurance Activity Report Apple iOS 11 Safari, Version 0.5, November 2018. [AAR]  Apple iOS 11 Safari on iPhone and iPad Common Criteria Configuration Guide, Version 1.2, November 2018. [AGD]  Apple iOS 11 Safari Security Target Evaluation Technical Report (ASE), Version 0.5, November 2018, [ETR]  Apple iOS 11 Safari Security Target Evaluation Technical Report (TOE), Version 1.3, November 2018, [ETR] .  Test Plan for a Target of Evaluation, Version 1.3, November 2018 [DTR]