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XCCDF
Samsung Android OS 14 with Knox 3.x COPE Security Technical Implementation Guide
Samsung Android OS 14 with Knox 3.x COPE Security Technical Implementation Guide
An XCCDF Benchmark
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File Metadata
39 rules organized in 39 groups
PP-MDF-993300
1 Rule
Samsung Android must be enrolled as a COPE device.
Medium Severity
The Work profile is the designated application group for the COPE use case. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-333160
1 Rule
Samsung Android must be configured to display the DOD advisory warning message at startup or each time the user unlocks the device.
Low Severity
Before granting access to the system, the mobile operating system is required to display the DOD-approved system use notification message or banner that provides privacy and security notices consistent with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance. Required banners help ensure that DOD can audit and monitor the activities of mobile device users without legal restriction. System use notification messages can be displayed when individuals first access or unlock the mobile device. The banner must be implemented as a "click-through" banner at device unlock (to the extent permitted by the operating system). A "click-through" banner prevents further activity on the information system unless and until the user executes a positive action to manifest agreement by clicking on a box indicating "OK." The approved DOD text must be used exactly as required in the Knowledge Service referenced in DODI 8500.01. For devices accommodating banners of 1300 characters, the banner text is: You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE, or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. Refer to User Agreement for details. For devices with severe character limitations, the banner text is: I've read & consent to terms in IS user agreem't. The Administrator must configure the banner text exactly as written without any changes. SFR ID: FMT_SMF_EXT.1.1 #36
PP-MDF-333025
1 Rule
Samsung Android must be configured to not allow passwords that include more than four repeating or sequential characters.
Medium Severity
Password strength is a measure of the effectiveness of a password in resisting guessing and brute force attacks. Passwords that contain repeating or sequential characters are significantly easier to guess than those that do not. Therefore, disallowing repeating or sequential characters increases password strength and decreases risk. SFR ID: FMT_SMF_EXT.1.1 #1b
PP-MDF-333024
1 Rule
Samsung Android must be configured to enforce a minimum password length of six characters.
Medium Severity
Password strength is a measure of the effectiveness of a password in resisting guessing and brute force attacks. The ability to crack a password is a function of how many attempts an adversary is permitted, how quickly an adversary can complete each attempt, and the size of the password space. The longer the minimum length of the password is, the larger the password space. Having a too-short minimum password length significantly reduces password strength, increasing the chance of password compromise and resulting device and data compromise. SFR ID: FMT_SMF_EXT.1.1 #1a
PP-MDF-333040
1 Rule
Samsung Android must be configured to not allow more than 10 consecutive failed authentication attempts.
Medium Severity
The more attempts an adversary has to guess a password, the more likely the adversary will enter the correct password and gain access to resources on the device. Setting a limit on the number of attempts mitigates this risk. Setting the limit at 10 or fewer attempts gives authorized users the ability to make a few mistakes when entering the password but still provides adequate protection against dictionary or brute force attacks on the password. SFR ID: FMT_SMF_EXT.1.1 #2c, FIA_AFL_EXT.1.5
PP-MDF-333030
1 Rule
Samsung Android must be configured to lock the display after 15 minutes (or less) of inactivity.
Medium Severity
The screen lock timeout must be set to a value that helps protect the device from unauthorized access. Having a too-long timeout would increase the window of opportunity for adversaries who gain physical access to the mobile device through loss, theft, etc. Such devices are much more likely to be in an unlocked state when acquired by an adversary, thus granting immediate access to the data on the mobile device. The maximum timeout period of 15 minutes has been selected to balance functionality and security; shorter timeout periods may be appropriate depending on the risks posed to the mobile device. SFR ID: FMT_SMF_EXT.1.1 #2b
PP-MDF-333110
1 Rule
Samsung Android must be configured to disable authentication mechanisms providing user access to protected data other than a Password Authentication Factor: Face recognition.
Medium Severity
The biometric factor can be used to authenticate the user to unlock the mobile device. Unapproved/evaluated biometric mechanisms could allow unauthorized users to have access to DOD sensitive data if compromised. By not permitting the use of unapproved/evaluated biometric authentication mechanisms, this risk is mitigated. SFR ID: FMT_SMF_EXT.1.1 #22, FIA_UAU.5.1
PP-MDF-333030
1 Rule
Samsung Android must be configured to enable a screen-lock policy that will lock the display after a period of inactivity - Disable trust agents.
Medium Severity
The screen lock timeout must be set to a value that helps protect the device from unauthorized access. Having a too-long timeout would increase the window of opportunity for adversaries who gain physical access to the mobile device through loss, theft, etc. Such devices are much more likely to be in an unlocked state when acquired by an adversary, thus granting immediate access to the data on the mobile device. The maximum timeout period of 15 minutes has been selected to balance functionality and security; shorter timeout periods may be appropriate depending on the risks posed to the mobile device. SFR ID: FMT_SMF_EXT.1.1 #2a
PP-MDF-333130
1 Rule
Samsung Android must be configured to disable developer modes.
Medium Severity
Developer modes expose features of the MOS that are not available during standard operation. An adversary may leverage a vulnerability inherent in a developer mode to compromise the confidentiality, integrity, and availability of DOD sensitive information. Disabling developer modes mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #26
PP-MDF-333320
1 Rule
Samsung Android must be configured to disable all Bluetooth profiles except for HSP (Headset Profile), HFP (Hands-Free Profile), SPP (Serial Port Profile), A2DP (Advanced Audio Distribution Profile), AVRCP (Audio/Video Remote Control Profile), and PBAP (Phone Book Access Profile).
Low Severity
Some Bluetooth profiles provide the capability for remote transfer of sensitive DOD data without encryption or otherwise do not meet DOD IT security policies and therefore must be disabled. SFR ID: FMT_SMF_EXT.1.1/BLUETOOTH BT-8
PP-MDF-333100
1 Rule
Samsung Android must be configured to enable encryption for data at rest on removable storage media or, alternately, the use of removable storage media must be disabled.
High Severity
The MOS must ensure the data being written to the mobile device's removable media is protected from unauthorized access. If data at rest is unencrypted, it is vulnerable to disclosure. Even if the operating system enforces permissions on data access, an adversary can read removable media directly, thereby circumventing operating system controls. Encrypting the data ensures confidentiality is protected even when the operating system is not running. SFR ID: FMT_SMF_EXT.1.1 #20, #47d
PP-MDF-333230
1 Rule
Samsung Android must be configured to disable USB mass storage mode.
Medium Severity
USB mass storage mode enables the transfer of data and software from one device to another. This software can include malware. When USB mass storage is enabled on a mobile device, it becomes a potential vector for malware and unauthorized data exfiltration. Prohibiting USB mass storage mode mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #39
PP-MDF-333240
1 Rule
Samsung Android must be configured to not allow backup of all applications and configuration data to locally connected systems.
Medium Severity
Data on mobile devices is protected by numerous mechanisms, including user authentication, access control, and cryptography. When the data is backed up to an external system (either locally connected or cloud based), many if not all of these mechanisms are no longer present. This leaves the backed-up data vulnerable to attack. Disabling backup to external systems mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #40
PP-MDF-333260
1 Rule
Samsung Android must be configured to enable authentication of personal hotspot connections to the device using a pre-shared key.
Medium Severity
If no authentication is required to establish personal hotspot connections (Wi-Fi and Bluetooth), an adversary may be able to use that device to perform attacks on other devices or networks without detection. A sophisticated adversary may also be able to exploit unknown system vulnerabilities to access information and computing resources on the device. Requiring authentication to establish personal hotspot connections mitigates this risk. Application note: If hotspot functionality is permitted, it must be authenticated via a preshared key. There is no requirement to enable hotspot functionality, and it is recommended this functionality be disabled by default. SFR ID: FMT_SMF_EXT.1.1 #41
PP-MDF-993300
1 Rule
Samsung Android must be configured to disallow configuration of the device's date and time.
Medium Severity
Determining the correct time a particular application event occurred on a system is critical when conducting forensic analysis and investigating system events. Periodically synchronizing internal clocks with an authoritative time source is necessary to correctly correlate the timing of events that occur across the enterprise. The three authoritative time sources for Samsung Android are an authoritative time server that is synchronized with redundant United States Naval Observatory (USNO) time servers as designated for the appropriate DOD network (NIPRNet or SIPRNet), the Global Positioning System (GPS), or the wireless carrier. Time stamps generated by the audit system in Samsung Android must include both date and time. The time may be expressed in Coordinated Universal Time (UTC), a modern continuation of Greenwich Mean Time (GMT), or local time with an offset from UTC. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-993300
1 Rule
Samsung Android's Work profile must have the DOD root and intermediate PKI certificates installed.
Medium Severity
DOD root and intermediate PKI certificates are used to verify the authenticity of PKI certificates of users and web services. If the root and intermediate certificates are not available, an adversary could falsely sign a certificate in such a way that it could not be detected. Providing access to the DOD root and intermediate PKI certificates greatly diminishes the risk of this attack. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-333060
1 Rule
Samsung Android's Work profile must be configured to enforce an application installation policy by specifying an application allowlist that restricts applications by the following characteristics: Names.
Medium Severity
The application allowlist, in addition to controlling the installation of applications on the MD, must control user access/execution of all core and preinstalled applications, or the MD must provide an alternate method of restricting user access/execution to core and preinstalled applications. Core application: Any application integrated into the OS by the OS or MD vendors. Preinstalled application: Additional noncore applications included in the OS build by the OS vendor, MD vendor, or wireless carrier. Requiring all authorized applications to be in an application allowlist prevents the execution of any applications (e.g., unauthorized, malicious) that are not part of the allowlist. Failure to configure an application allowlist properly could allow unauthorized and malicious applications to be downloaded, installed, and executed on the mobile device, causing a compromise of DOD data accessible by these applications. The application allowlist, in addition to controlling the installation of applications on the MD, must control user access/execution of all core applications (included in the OS by the OS vendor) and preinstalled applications (provided by the MD vendor and wireless carrier), or the MD must provide an alternate method of restricting user access/execution to core and preinstalled applications. SFR ID: FMT_SMF_EXT.1.1 #8b
PP-MDF-333070
1 Rule
Samsung Android's Work profile must be configured to not allow installation of applications with the following characteristics: - Back up MD data to non-DOD cloud servers (including user and application access to cloud backup services); - Transmit MD diagnostic data to non-DOD servers; - Voice assistant application if available when MD is locked; - Voice dialing application if available when MD is locked; - Allows synchronization of data or applications between devices associated with user; and - Allows unencrypted (or encrypted but not FIPS 140-2 validated) data sharing with other MDs or printers.
Medium Severity
Requiring all authorized applications to be in an application allowlist prevents the execution of any applications (e.g., unauthorized, malicious) that are not part of the allowlist. Failure to configure an application allowlist properly could allow unauthorized and malicious applications to be downloaded, installed, and executed on the mobile device, causing a compromise of DOD data accessible by these applications. Applications with the listed characteristics have features that can cause the compromise of sensitive DOD data or have features with no known application in the DOD environment. Application note: The application allowlist, in addition to controlling the installation of applications on the MD, must control user access/execution of all core and preinstalled applications, or the MD must provide an alternate method of restricting user access/execution to core and preinstalled applications. Core application: Any application integrated into the OS by the OS or MD vendors. Preinstalled application: Additional noncore applications included in the OS build by the OS vendor, MD vendor, or wireless carrier. SFR ID: FMT_SMF_EXT.1.1 #8b
PP-MDF-333080
1 Rule
Samsung Android must be configured to not display the following (Work Environment) notifications when the device is locked: All notifications.
Medium Severity
Many mobile devices display notifications on the lock screen so that users can obtain relevant information in a timely manner without having to frequently unlock the phone to determine if there are new notifications. However, in many cases, these notifications can contain sensitive information. When they are available on the lock screen, an adversary can see them merely by being in close physical proximity to the device. Configuring the MOS to not send notifications to the lock screen mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #18
PP-MDF-993300
1 Rule
Samsung Android's Work profile must be configured to enable audit logging.
Medium Severity
Audit logs enable monitoring of security-relevant events and subsequent forensics when breaches occur. They help identify attacks so that breaches can either be prevented or limited in their scope. They facilitate analysis to improve performance and security. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-993300
1 Rule
Samsung Android's Work profile must be configured to prevent users from adding personal email accounts to the work email app.
Medium Severity
If the user is able to add a personal email account (POP3, IMAP, EAS) to the work email app, it could be used to forward sensitive DOD data to unauthorized recipients. Restricting email account addition to the Administrator or to allowlisted accounts mitigates this vulnerability. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-333250
1 Rule
Samsung Android's Work profile must be configured to not allow backup of all applications, configuration data to remote systems.- Disable Data Sync Framework.
Medium Severity
Backups to remote systems (including cloud backup) can leave data vulnerable to breach on the external systems, which often offer less protection than the MOS. Where the remote backup involves a cloud-based solution, the backup capability is often used to synchronize data across multiple devices. In this case, DOD devices may synchronize DOD sensitive information to a user's personal device or other unauthorized computers that are vulnerable to breach. The Data Sync Framework allows apps to synchronize data between the mobile device and other web-based services. This uses accounts for services the user has added to the mobile device. Preventing the user from adding accounts to the device mitigates this risk. For COBO/COPE (work profile), data cannot be backed up remotely via Backup Services. Work (profile) data could be backed up by adding an account to an app that supports the data sync framework; however, this is mitigated by preventing the addition of any accounts to the Work profile. SFR ID: FMT_SMF_EXT.1.1 #40
PP-MDF-333280
1 Rule
Samsung Android's Work profile must be configured to disable exceptions to the access control policy that prevent application processes and groups of application processes from accessing all data stored by other application processes and groups of application processes.
Medium Severity
App data sharing gives apps the ability to access the data of other apps for enhanced user functionality. However, sharing also poses a significant risk that unauthorized users or apps will obtain access to DOD sensitive information. To mitigate this risk, there are data sharing restrictions, primarily from sharing data from personal (unmanaged) apps and work (managed) apps. If a user is allowed to make exceptions to the data sharing restriction policy, the user could enable unauthorized sharing of data, leaving it vulnerable to breach. Limiting the granting of exceptions to either the Administrator or common application developer mitigates this risk. Copy/paste of data between applications in different application processes or groups of application processes is considered an exception to the access control policy and therefore, the Administrator must be able to enable/disable the feature. Other exceptions include allowing any data or application sharing between process groups. SFR ID: FMT_SMF_EXT.1.1 #42, FDP_ACF_EXT.1.2
PP-MDF-333350
1 Rule
Samsung Android's Work profile must allow only the Administrator (management tool) to perform the following management function: Install/remove DOD root and intermediate PKI certificates.
Medium Severity
DOD root and intermediate PKI certificates are used to verify the authenticity of PKI certificates of users and web services. If the user is allowed to remove root and intermediate certificates, the user could allow an adversary to falsely sign a certificate in such a way that it could not be detected. Restricting the ability to remove DOD root and intermediate PKI certificates to the Administrator mitigates this risk. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-333050
1 Rule
Samsung Android must be configured to enforce an application installation policy by specifying one or more authorized application repositories, including DOD-approved commercial app repository, management tool server, or mobile application store.
Medium Severity
Forcing all applications to be installed from authorized application repositories can prevent unauthorized and malicious applications from being installed and executed on mobile devices. Allowing such installations and executions could cause a compromise of DOD data accessible by these unauthorized/malicious applications. SFR ID: FMT_SMF_EXT.1.1 #8a
PP-MDF-993300
1 Rule
Samsung Android's Work profile must be configured to enable Common Criteria (CC) mode.
Low Severity
The CC mode feature is a superset of other features and behavioral changes that are mandatory MDFPP requirements. If CC mode is not implemented, the device will not be operating in the NIAP-certified compliant CC mode of operation. When enforcing Android Enterprise (AE) CC mode on a Samsung Android device, additional Samsung-specific security features are also enabled. CC mode implements the following behavioral/functional changes to meet MDFPP requirements: - How the Bluetooth and Wi-Fi keys are stored using different types of encryption. - Download mode is disabled and all updates will occur via Firmware Over the Air (FOTA) only. In addition, CC mode adds new restrictions not to meet MDFPP requirements but to offer better security above what is required: - Force password info following FOTA update for consistency. - Disable Remote unlock by FindMyMobile. - Restrict biometric attempts to 10. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-331080
1 Rule
Samsung Android must not accept the certificate when it cannot establish a connection to determine the validity of a certificate.
Low Severity
Certificate-based security controls depend on the ability of the system to verify the validity of a certificate. If the MOS were to accept an invalid certificate, it could take unauthorized actions, resulting in unanticipated outcomes. At the same time, if the MOS were to disable functionality when it could not determine the validity of the certificate, this could result in a denial of service. Therefore, the ability to provide exceptions is appropriate to balance the tradeoff between security and functionality. Always accepting certificates when they cannot be determined to be valid is the most extreme exception policy and is not appropriate in the DOD context. Involving an Administrator or user in the exception decision mitigates this risk to some degree. SFR ID: FIA_X509_EXT_2.2
PP-MDF-993300
1 Rule
Samsung Android device users must complete required training.
Medium Severity
The security posture of Samsung devices requires the device user to configure several required policy rules on their device. User-Based Enforcement (UBE) is required for these controls. In addition, if the Authorizing Official (AO) has approved the use of an unmanaged personal space, the user must receive training on risks. If a user is not aware of their responsibilities and does not comply with UBE requirements, the security posture of the Samsung mobile device may become compromised, and DOD sensitive data may become compromised. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-993300
1 Rule
The Samsung Android device must have the latest available Samsung Android operating system (OS) installed.
High Severity
Required security features are not available in earlier OS versions. In addition, earlier versions may have known vulnerabilities. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-993300
1 Rule
The Samsung Android device must be configured to enable Certificate Revocation List (CRL) status checking.
Medium Severity
A CRL allows a certificate issuer to revoke a certificate for any reason, including improperly issued certificates and compromise of the private keys. Checking the revocation status of the certificate mitigates the risk associated with using a compromised certificate. For this reason, users must not be able to disable this configuration. Samsung Android can control CRL checking but only using Knox APIs. Alternatively, CRL checking is based on app development best practice. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-993300
1 Rule
The Samsung Android device must be configured to enforce that Wi-Fi Sharing is disabled.
Medium Severity
Wi-Fi Sharing is an optional configuration of Wi-Fi Tethering/Mobile Hotspot, which allows the device to share its Wi-Fi connection with other wirelessly connected devices instead of its mobile (cellular) connection. Wi-Fi Sharing grants the "other" device access to a corporate Wi-Fi network and may possibly bypass the network access control mechanisms. This risk can be partially mitigated by requiring the use of a preshared key for personal hotspots. SFR ID: FMT_SMF_EXT.1.1 #47
PP-MDF-993300
1 Rule
The Samsung Android device work profile must be configured to enforce the system application disable list.
Medium Severity
The system application disable list controls user access to/execution of all core and preinstalled applications. Core application: Any application integrated into Samsung Android 14 by Samsung. Preinstalled application: Additional noncore applications included in the Samsung Android 14 build by Samsung or the wireless carrier. Some system applications can compromise DOD data or upload users' information to non-DOD-approved servers. A user must be blocked from using such applications that exhibit behavior that can result in compromise of DOD data or DOD user information. The site administrator must analyze all preinstalled applications on the device and disable all applications not approved for DOD use by configuring the system application disable list. SFR ID: FMT_SMF_EXT.1.1 #47
PP-MDF-993300
1 Rule
The Samsung Android device must be provisioned as a fully managed device and configured to create a work profile.
Medium Severity
The Android Enterprise work profile is the designated application group for the COPE use case. SFR ID: FMT_SMF_EXT.1.1 #47
PP-MDF-993300
1 Rule
The Samsung Android device work profile must be configured to disable automatic completion of work space internet browser text input.
Medium Severity
The autofill functionality in the web browser allows the user to complete a form that contains sensitive information, such as personally identifiable information (PII), without previous knowledge of the information. By allowing the use of autofill functionality, an adversary who learns a user's Android 14 device password, or who otherwise is able to unlock the device, may be able to further breach other systems by relying on the autofill feature to provide information unknown to the adversary. By disabling the autofill functionality, the risk of an adversary gaining further information about the device's user or compromising other systems is significantly mitigated. SFR ID: FMT_SMF_EXT.1.1 #47
PP-MDF-993300
1 Rule
The Samsung Android device work profile must be configured to disable the autofill services.
Medium Severity
The autofill services allow the user to complete text inputs that could contain sensitive information, such as personally identifiable information (PII), without previous knowledge of the information. By allowing the use of autofill services, an adversary who learns a user's Android 14 device password, or who otherwise is able to unlock the device, may be able to further breach other systems by relying on the autofill services to provide information unknown to the adversary. By disabling the autofill services, the risk of an adversary gaining further information about the device's user or compromising other systems is significantly mitigated. Examples of apps that offer autofill services include Samsung Pass, Google, Dashlane, LastPass, and 1Password. SFR ID: FMT_SMF_EXT.1.1 #47
PP-MDF-993300
1 Rule
The Samsung Android device must be configured to disable the use of third-party keyboards.
Low Severity
Many third-party keyboard applications are known to contain malware. SFR ID: FMT_SMF_EXT.1.1 #47
PP-MDF-993300
1 Rule
The Samsung Android device must be configured to disable all data signaling over [assignment: list of externally accessible hardware ports (for example, USB)].
Medium Severity
If a user is able to configure the security setting, the user could inadvertently or maliciously set it to a value that poses unacceptable risk to DOD information systems. An adversary could exploit vulnerabilities created by the weaker configuration to compromise DOD sensitive information. SFR ID: FMT_MOF_EXT.1.2 #24
PP-MDF-993300
1 Rule
The Samsung Android device must be configured to perform the following management function: Disable Phone Hub.
Low Severity
It may be possible to transfer work profile data on a DOD Android device to an unauthorized Chromebook if the user has the same Google Account set up on the Chromebook. This may result in the exposure of sensitive DOD data. SFR ID: FMT_MOF_EXT.1.2 #47
PP-MDF-333330
1 Rule
Samsung Android must be configured to disable ad hoc wireless client-to-client connection capability.
Medium Severity
Ad hoc wireless client-to-client connections allow mobile devices to communicate with each other directly, circumventing network security policies and making the traffic invisible. This could allow the exposure of sensitive DOD data and increase the risk of downloading and installing malware of the DOD mobile device. SFR ID: FMT_SMF_EXT.1.1/WLAN