View STIG - Samsung Android OS 9 with Knox 3.x COBO Use Case KPE(Legacy) Deployment Security Technical Implementation Guide V1R4

b

Samsung Android must be configured to prevent users from adding personal email accounts to the work email app.

CM-6 - Medium - CCI-000366 - V-92953 - SV-103041r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000015

Vuln IDs

V-92953

Rule IDs

SV-103041r1_rule

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 restricting email account addition to whitelisted accounts mitigates this vulnerability. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92271r1_chk

Review device configuration settings to confirm that users are prevented from adding personal email accounts to the work email app. This procedure is performed on both the MDM Administrator console and the Samsung Android device. Confirm if Method #1 or Method #2 is used at the Samsung device site and follow the appropriate procedure. **** Method #1: On the MDM console, for the device, in the "Knox account" group, verify that the account addition whitelist only includes DoD-approved email domains. Refer to the MDM documentation to determine if the account addition blacklist is also required to be configured when enforcing an account addition whitelist. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Accounts and backup". 3. Tap "Add account". 4. Tap the account type for the work email app. 5. Verify that an account with a DoD-approved email domain can be added. 6. Verify that an account without a DoD-approved email domain cannot be added. If on the MDM console the account addition whitelist includes domains that are not DoD-approved email domains, or on the Samsung Android device the user is able to add an account without a DoD-approved email domain, this is a finding. **** Method #2: On the MDM console, for the device, do the following: 1. In the "Knox account" group, verify that all email domains are blacklisted in the account addition blacklist. 2. Verify that the user's email account for the work email app has been provisioned. Refer to the MDM documentation to determine how to verify that a user's work email account is provisioned for the work email app. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Accounts and backup". 3. Tap "Accounts". 4. Tap "Add account". 5. Verify that no accounts can be added. If on the MDM console the account addition blacklist is not set to blacklist all email domains, or on the Samsung Android device the user is able to add an account, this is a finding.

Fix: F-99199r1_fix

Configure Samsung Android to prevent users from adding personal email accounts to the work email app. Do one of the following: - Method #1: Allow users to only add DoD-approved email accounts to the work email app. - Method #2: Disallow users from adding any email accounts to the work email app and provision the users' email account on their behalf. **** Method #1: On the MDM console, for the device, in the "Knox account" group, add all DoD-approved email domains to the account addition whitelist. Refer to the MDM documentation to determine if an account addition blacklist is also required to be configured when enforcing an account addition whitelist. **** Method #2: On the MDM console, for the device, do the following: 1. In the "Knox account" group, blacklist all email domains in the account addition blacklist. 2. Provision the user's email account for the work email app. Refer to the MDM documentation to determine how to provision users' work email accounts for the work email app.

b

Samsung Android must be configured to enforce the system application disable list.

CM-6 - Medium - CCI-000366 - V-92955 - SV-103043r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000045

Vuln IDs

V-92955

Rule IDs

SV-103043r1_rule

The system application disable list controls user access to/execution of all core and preinstalled applications. Core application: Any application integrated into Samsung Android by Google or Samsung. Preinstalled application: Additional noncore applications included in the Samsung Android build by Google, 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

Checks: C-92273r1_chk

Review device configuration settings to confirm that the system application disable list has been configured. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox application" group, verify the system application disable list contains all apps that have not been approved for DoD use by the Authorizing Official (AO). On the Samsung Android device, review the apps on the "Personal" App screen and confirm that none of the apps listed in the system application disable list are present. If the system application disable list does not contain all the apps that have not been approved by the AO, or if an app listed can be found on the "Personal" App screen of the Samsung Android device, this is a finding.

Fix: F-99201r1_fix

Configure Samsung Android to enforce the system application disable list. On the MDM console, for the device, in the "Knox application" group, add all non-AO-approved system app packages to the system application disable list. Note: Refer to the "System Apps for disablement (other characteristics)" and "System Apps That Must Not Be Disabled" tables in the Supplemental document for this STIG.

b

Samsung Android must be configured to enforce an application installation policy by specifying an application whitelist that restricts applications by the following characteristics: list of digital signatures, list of package names.

CM-6 - Medium - CCI-000366 - V-92957 - SV-103045r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000075

Vuln IDs

V-92957

Rule IDs

SV-103045r1_rule

The application whitelist, in addition to controlling the installation of applications on the mobile device, must control user access to/execution of all core and preinstalled applications, or the mobile device must provide an alternate method of restricting user access to/execution of core and preinstalled applications. Core application: Any application integrated into the operating system by the operating system or mobile device vendors. Preinstalled application: Additional noncore applications included in the operating system build by the operating system vendor, mobile device vendor, or wireless carrier. Requiring all authorized applications to be in an application whitelist prevents the execution of any applications (e.g., unauthorized, malicious) that are not part of the whitelist. Failure to configure an application whitelist 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 whitelist, in addition to controlling the installation of applications on the mobile device, must control user access to/execution of all core applications (included in the operating system by the operating system vendor) and preinstalled applications (provided by the mobile device vendor and wireless carrier), or the mobile device must provide an alternate method of restricting user access to/execution of core and preinstalled applications. SFR ID: FMT_SMF_EXT.1.1 #8b

Checks: C-92275r1_chk

Review device configuration settings to confirm that an application installation whitelist has been configured. This procedure is performed only on the MDM Administration console. On the MDM console, for the device, in the "Knox application" group, verify that each package listed on the application installation whitelist has been approved for DoD use by the Authorizing Official (AO). If the application installation whitelist contains non-AO-approved packages, this is a finding.

Fix: F-99203r1_fix

Configure Samsung Android to enforce an application installation whitelist. The application installation whitelist does not control user access to/execution of all core and preinstalled applications, and guidance for doing so is covered in KNOX-09-000055. On the MDM console, for the device, in the "Knox application" group, add each AO-approved package to the application installation whitelist. Refer to the MDM documentation to determine the following: - If an application installation blacklist is also required to be configured when enforcing an application installation whitelist. - If the MDM supports adding packages to the application installation whitelist by package name and/or digital signature or supports a combination of the two. Note: Refer to the "System Apps That Must Not Be Disabled" table in the Supplemental document for this STIG. These apps must be included in the application installation whitelist to allow updates.

b

The Samsung Android whitelist must be configured to not include applications with the following characteristics: - back up mobile device data to non-DoD cloud servers (including user and application access to cloud backup services); - transmit mobile device diagnostic data to non-DoD servers; - voice assistant application if available when the mobile device is locked; - voice dialing application if available when the mobile device is locked; - allows synchronization of data or applications between devices associated with the user; and - allows unencrypted (or encrypted but not FIPS 140-2 validated) data sharing with other mobile devices or printers.

CM-6 - Medium - CCI-000366 - V-92959 - SV-103047r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000105

Vuln IDs

V-92959

Rule IDs

SV-103047r1_rule

Requiring all authorized applications to be in an application whitelist prevents the execution of any applications (e.g., unauthorized, malicious) that are not part of the whitelist. Failure to configure an application whitelist 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 whitelist, in addition to controlling the installation of applications on the mobile device, must control user access to/execution of all core and preinstalled applications, or the mobile device must provide an alternate method of restricting user access to/execution of core and preinstalled applications. Core application: Any application integrated into the operating system by the operating system or mobile device vendors. Preinstalled application: Additional noncore applications included in the operating system build by the operating system vendor, mobile device vendor, or wireless carrier. SFR ID: FMT_SMF_EXT.1.1 #8b

Checks: C-92277r1_chk

Review device configuration settings to confirm that the system application disable list has been configured to include all system apps that have been identified as having non-DoD-approved characteristics. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox application" group, verify that the system application disable list contains all apps identified as having non-DoD-approved characteristics. On the Samsung Android device, review the apps on the "Personal" App screen and confirm that none of the apps listed in the system application disable list are present. If the system application disable list does not contain all the apps that have been identified as having non-DoD-approved characteristics, or if an app listed can be found on the "Personal" App screen of the Samsung Android device, this is a finding.

Fix: F-99205r1_fix

Configure Samsung Android to include all system apps in the system app disable list that have been identified as having non-DoD-approved characteristics. The system application disable list controls user access to/execution of core and preinstalled applications. It does not control the installation of applications. On the MDM console, for the device, in the "Knox application" group, add all system app packages that have been identified as having non-DoD-approved characteristics to the system application disable list. Note: Refer to the "System Apps for Disablement (Non-DoD-Approved Characteristics)" and "System Apps That Must Not Be Disabled" tables in the Supplemental document for this STIG.

b

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, MDM server, mobile application store]: - disallow unknown app installation sources.

CM-6 - Medium - CCI-000366 - V-93569 - SV-103655r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000135

Vuln IDs

V-93569

Rule IDs

SV-103655r1_rule

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

Checks: C-92885r1_chk

Review device configuration settings to confirm that installation from unauthorized application repositories is disallowed. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "allow install unknown sources" is not selected. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Apps". 3. Tap the Overflow menu (three vertical dots). 4. Tap "Special Access". 5. Tap "Install unknown apps". 6. Tap a listed app. 7. Verify that "Allow from this source" cannot be enabled. If on the MDM console "allow install unknown source" is selected, or on the Samsung Android device the user can enable "allow from this source" for an app, this is a finding.

Fix: F-99813r1_fix

Configure Samsung Android to disallow installation from unauthorized application repositories. On the MDM console, for the device, in the "Knox restrictions" group, unselect "allow install unknown sources".

b

Samsung Android must be configured to enable the Knox audit log.

CM-6 - Medium - CCI-000366 - V-93573 - SV-103659r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000175

Vuln IDs

V-93573

Rule IDs

SV-103659r1_rule

Audit logs enable monitoring of security-relevant events and subsequent forensics when breaches occur. They help identify attacks so that breaches can be prevented or limited in their scope, and they facilitate analysis to improve performance and security. The requirement statement lists key events for which the system must generate an audit record. SFR ID: FAU_GEN.1.1 #8

Checks: C-92889r1_chk

Review device configuration settings to confirm that the Knox audit log is enabled. This procedure is performed on the MDM Administration console only. On the MDM console, for the device, in the "Knox audit log" group, verify that "enable audit log" is selected. If on the MDM console the "enable audit log" is not selected, this is a finding.

Fix: F-99817r1_fix

Configure Samsung Android to enable the Knox audit log. On the MDM console, for the device, in the "Knox audit log" group, select "enable audit log".

b

Samsung Android must be configured to not display the following notifications when the device is locked: all notifications.

AC-8 - Medium - CCI-000051 - V-93575 - SV-103661r1_rule

RMF Control

AC-8

Severity

Medium

CCI

CCI-000051

Version

KNOX-09-000285

Vuln IDs

V-93575

Rule IDs

SV-103661r1_rule

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 mobile operating system to redact the contents of the notifications when the device is locked mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #19

Checks: C-92891r1_chk

Review device configuration settings to confirm that the content of notifications is redacted when the device is locked. This procedure is performed on both the MDM console and the Samsung Android device. On the MDM console, for the device, in the "Android lock screen restrictions" group, verify that "disable unredacted notifications" is selected. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Lock screen". 3. Verify that "Notifications" is disabled. If on the MDM console "disable unredacted notifications" is not selected, or on the Samsung Android device "Notifications" is not disabled, this is a finding.

Fix: F-99819r1_fix

Configure Samsung Android to redact notifications when the device is locked. On the MDM console, for the device, in the "Android lock screen restrictions" group, select "disable unredacted notifications".

b

Samsung Android device users must complete required training.

CM-6 - Medium - CCI-000366 - V-93577 - SV-103663r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000355

Vuln IDs

V-93577

Rule IDs

SV-103663r1_rule

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: NA

Checks: C-92893r1_chk

Review a sample of site User Agreements of Samsung device users or similar training records and training course content. Verify that Samsung device users have completed the required training. The intent is that required training is renewed on a periodic basis in a time period determined by the AO. If any Samsung device user has not completed required training, this is a finding.

Fix: F-99821r1_fix

Have all Samsung device users complete training on the following topics. Users should acknowledge that they have reviewed training via a signed User Agreement or similar written record. Training topics: - Operational security concerns introduced by unmanaged applications/unmanaged personal space, including applications using global positioning system (GPS) tracking. - Need to ensure no DoD data is saved to the personal space or transmitted from a personal app (for example, from personal email). - If the Purebred key management app is used, users are responsible for maintaining positive control of their credentialed device at all times. The DoD PKI certificate policy requires subscribers to maintain positive control of the devices that contain private keys and to report any loss of control so the credentials can be revoked. Upon device retirement, turn-in, or reassignment, ensure that a factory data reset is performed prior to device hand-off. Follow Mobility service provider decommissioning procedures as applicable. - How to configure the following UBE controls (users must configure the control) on the Samsung device: **Secure use of Calendar Alarm **Local screen mirroring and MirrorLink procedures (authorized/not authorized for use) **Do not connect Samsung devices (either via DeX Station or dongle) to any DoD network via Ethernet connection **Do not upload DoD contacts via smart call and caller ID services **Do not remove DoD intermediate and root PKI digital certificates **Disable Wi-Fi Sharing **Do not configure a DoD network (work) VPN profile on any third-party VPN client installed in the personal space **Enable Secure Startup, and must not disable at any time **Must not disable Strong Protection at any time - AO guidance on acceptable use and restrictions, if any, on downloading and installing personal apps and data (music, photos, etc.) in the Samsung device personal space.

b

Any accessory that provides wired networking capabilities to a Samsung Android device must not be connected to a DoD network (for example: DeX Station [LAN port], USB to Ethernet adapter, etc.).

CM-6 - Medium - CCI-000366 - V-93579 - SV-103665r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000365

Vuln IDs

V-93579

Rule IDs

SV-103665r1_rule

If a Samsung Android device uses an accessory that provides wired networking capabilities, and that accessory is connected to a DoD network, then the Samsung Android device would also be connected to the DoD network. Samsung Android devices most likely have a number of personal apps installed that may include malware or have high-risk behaviors (for example, offloading data from the phone to third-party servers outside the United States). In addition, smartphones do not generally meet security requirements for computer devices to connect directly to DoD networks. Note: Samsung DeX mode (with input devices) will not work unless the "USB host mode exception list" is configured (see requirement KNOX-09-000755 for more information). SFR ID: FMT_MOF_EXT.1.2 #47

Checks: C-92895r1_chk

Review accessories that provide wired networking capabilities to Samsung Android devices at the site and verify that the accessories are not connected to a DoD network. If accessories that provide wired networking capabilities to Samsung Android devices are connected to DoD networks, this is a finding. Note: Connections to a site's guest network that provides Internet-only access can be used. Note: This setting cannot be managed by the MDM administrator and is a User-Based Enforcement (UBE) requirement.

Fix: F-99823r1_fix

When using an accessory that provides wired networking capabilities to a Samsung Android device, do not connect the accessory to a DoD network. Note: This setting cannot be managed by the MDM administrator and is a UBE requirement.

a

Samsung Android must be configured to enforce a minimum password length of six characters.

IA-5 - Low - CCI-000205 - V-93581 - SV-103667r1_rule

RMF Control

IA-5

Severity

Low

CCI

CCI-000205

Version

KNOX-09-000375

Vuln IDs

V-93581

Rule IDs

SV-103667r1_rule

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 do 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

Checks: C-92897r1_chk

Review device configuration settings to confirm that the minimum password length is six or more characters. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Android password constraints" group, verify that the "minimum password length" is "6" or greater. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Lock screen". 3. Tap "Screen lock type". 4. Enter current password. 5. Tap "Password". 6. Verify that passwords entered with fewer than six characters are not accepted. If on the MDM console "minimum password length" is less than "6", or on the Samsung Android device a password of less than "6" characters is accepted, this is a finding.

Fix: F-99825r1_fix

Configure Samsung Android to enforce a minimum password length of six characters. On the MDM console, in the Android password constraints, set the "minimum password length" to "6" or greater.

a

Samsung Android must be configured to not allow passwords that include more than two repeating or sequential characters.

CM-6 - Low - CCI-000366 - V-93583 - SV-103669r1_rule

RMF Control

CM-6

Severity

Low

CCI

CCI-000366

Version

KNOX-09-000395

Vuln IDs

V-93583

Rule IDs

SV-103669r1_rule

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 contain repeating or sequential characters. Therefore, disallowing repeating or sequential characters increases password strength and decreases risk. SFR ID: FMT_SMF_EXT.1.1 #1b

Checks: C-92899r1_chk

Review device configuration settings to confirm that passwords with two repeating or sequential characters are prevented. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, do the following: 1. For the device, in the "Knox password constraint" group, verify that "maximum sequential characters" is "2" or less. 2. For the device, in the "Knox password constraint" group, verify that "maximum sequential numbers" is "2" or less. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Lock screen". 3. Tap "Screen lock type". 4. Enter current password. 5. Tap "Password". 6. Verify that passwords with two or more sequential characters or numbers are not accepted. If on the MDM console "maximum sequential characters" or "maximum sequential numbers" is more than "2", or on the Samsung Android device a password with two or more sequential characters or numbers is accepted, this is a finding.

Fix: F-99827r1_fix

Configure Samsung Android to prevent passwords from containing more than two repeating or sequential characters. On the MDM console, for the device, in the "Knox password constraints" group: 1. Set "maximum sequential characters" to "2". 2. Set "maximum sequential numbers" to "2".

b

Samsung Android must be configured to lock the display after 15 minutes (or less) of inactivity.

AC-11 - Medium - CCI-000057 - V-93585 - SV-103671r1_rule

RMF Control

AC-11

Severity

Medium

CCI

CCI-000057

Version

KNOX-09-000405

Vuln IDs

V-93585

Rule IDs

SV-103671r1_rule

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

Checks: C-92901r1_chk

Review device configuration settings to confirm that the device locks the screen after 15 minutes (or less) of inactivity. This procedure is performed on both the MDM Administration Console and the Samsung Android device. On the MDM console, in the Android lock screen restrictions, verify that the "max time to screen lock" is "15" minutes or less. On the Samsung Android device, do the following: 1. Unlock the device. 2. Refrain from performing any activity on the device for 15 minutes. 3. Verify that the device requires the user to enter the device unlock password to access the device. If on the MDM console "max time to lock" is not set to "15" minutes or less, or the Samsung Android device does not require the user to authenticate to unlock after 15 minutes of inactivity, this is a finding.

Fix: F-99829r1_fix

Configure Samsung Android to lock the device display after 15 minutes (or less) of inactivity. On the MDM console, for the device, in the "Android lock screen restrictions" group, set the "max time to screen lock" to "15" minutes.

a

Samsung Android must be configured to not allow more than 10 consecutive failed authentication attempts.

AC-7 - Low - CCI-000044 - V-93587 - SV-103673r1_rule

RMF Control

AC-7

Severity

Low

CCI

CCI-000044

Version

KNOX-09-000435

Vuln IDs

V-93587

Rule IDs

SV-103673r1_rule

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 less 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

Checks: C-92903r1_chk

Review device configuration settings to confirm that the maximum number of consecutive failed authentication attempts is set to "10" or fewer. This procedure is performed on the MDM Administration console only. On the MDM console, for the device, in the "Android lock screen restrictions" group, verify that the "max password failures for local wipe" is "10" or fewer. If on the MDM console "max password failures for local wipe" is more than "10", this is a finding.

Fix: F-99831r1_fix

Configure Samsung Android to allow only 10 consecutive failed authentication attempts before device wipe. On the MDM console, for the Device, in the "Android lock screen restrictions" group, set the "max password failures for local wipe" to "10".

b

Samsung Android must be configured to disable trust agents. Note: This requirement is not applicable (NA) for specific biometric authentication factors included in the products Common Criteria evaluation.

CM-6 - Medium - CCI-000366 - V-93589 - SV-103675r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000475

Vuln IDs

V-93589

Rule IDs

SV-103675r1_rule

Trust agents allow a user to unlock a mobile device without entering a passcode when the mobile device is, for example, connected to a user-selected Bluetooth device or in a user-selected location. This technology would allow unauthorized users to have access to DoD sensitive data if compromised. By not permitting the use of non-password authentication mechanisms, users are forced to use passcodes that meet DoD passcode requirements. SFR ID: FMT_SMF_EXT.1.1 #23, FIA_UAU.5.1

Checks: C-92905r1_chk

Review device configuration settings to confirm that trust agents are disabled. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Android lock screen restrictions" group, verify that "disable trust agents" is selected. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Biometrics and security". 3. Tap "Other security settings". 4. Tap "Trust agents". 5. Verify that all listed trust agents are disabled and cannot be enabled. If on the MDM console "disable trust agents" is not selected, or on the Samsung Android device a trust agent can be enabled, this is a finding.

Fix: F-99833r1_fix

Configure Samsung Android to disable trust agents. On the MDM console, for the device, in the "Android lock screen restriction" group, select "disable trust agents".

b

Samsung Android must be configured to disable Face Recognition. Note: This requirement is not applicable (NA) for specific biometric authentication factors included in the products Common Criteria evaluation.

CM-6 - Medium - CCI-000366 - V-93591 - SV-103677r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000505

Vuln IDs

V-93591

Rule IDs

SV-103677r1_rule

The Face Recognition feature allows a user's face to be registered and used to unlock the device. This technology would allow unauthorized users to have access to DoD sensitive data if compromised. By not permitting the use of non-password authentication mechanisms, users are forced to use passcodes that meet DoD passcode requirements. SFR ID: FMT_SMF_EXT.1.1 #23, FIA_UAU.5.1

Checks: C-92907r1_chk

Review device configuration settings to confirm that Face Recognition is disabled. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox password constraints" group, verify that "disable face" is selected. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Lock screen". 3. Tap "Screen lock type". 4. Enter current password. 5. Verify that "Face" is disabled and cannot be enabled. If on the MDM console "disable face" is not selected, or on the Samsung Android device "Face" can be enabled, this is a finding.

Fix: F-99835r1_fix

Configure Samsung Android to disable Face Recognition. On the MDM console, for the device, in the "Knox password constraints" group, select "disable face".

b

Samsung Android must be configured to disable automatic completion of Samsung Internet browser text input.

CM-6 - Medium - CCI-000366 - V-93593 - SV-103679r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000585

Vuln IDs

V-93593

Rule IDs

SV-103679r1_rule

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 Samsung Android 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

Checks: C-92909r1_chk

Review device configuration settings to confirm that automatic completion of Samsung Internet app text input is disabled. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "allow autofill" is not selected. On the Samsung Android device, do the following: 1. From the "Personal" App screen, launch the "Samsung Internet" app. 2. From the collapsed menu icon (three horizontal bars) on the toolbar, tap "Settings". 3. Tap "Privacy and security". 4. Verify that "Autofill forms" is disabled, and cannot be enabled. If on the MDM console "allow autofill" is selected, or on the Samsung Android device "Autofill forms" can be enabled by the user, this is a finding.

Fix: F-99837r1_fix

Configure Samsung Android to disable automatic completion of Samsung Internet app text input. On the MDM console, for the device, in the "Knox restrictions" group, unselect "allow autofill".

b

Samsung Android must be configured to disable multi-user modes.

CM-6 - Medium - CCI-000366 - V-93595 - SV-103681r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000645

Vuln IDs

V-93595

Rule IDs

SV-103681r1_rule

Multi-user mode allows multiple users to share a mobile device by providing a degree of separation between user data. To date, no mobile device with multi-user mode features meets DoD requirements for access control, data separation, and non-repudiation for user accounts. In addition, the MDFPP does not include design requirements for multi-user account services. Disabling multi-user mode mitigates the risk of not meeting DoD multi-user account security policies. SFR ID: FMT_SMF_EXT.1.1 #47b

Checks: C-92911r1_chk

Review configuration settings to confirm that multi-user mode has been disabled. This procedure is performed on both the MDM Administrator console and the Samsung Android device. On the MDM console, in Knox MultiUser, verify that "allow multi-user mode" is not selected. On the Samsung Android device, open Settings and verify that the "User" setting is not available. If on the MDM console "allow multi-user mode" is selected, or on the Samsung Android device the "User" setting is available, this is a finding.

Fix: F-99839r1_fix

Configure Samsung Android to disable multi-user modes. On the MDM console, in Knox MultiUser, unselect "allow multi-user mode".

a

Samsung Android must be configured to disable all Bluetooth profiles except HSP (Headset Profile), HFP (HandsFree Profile), SPP (Serial Port Profile), A2DP (Advanced Audio Distribution Profile), AVRCP (Audio/Video Remote Control Profile), and PBAP (Phone Book Access Profile).

CM-6 - Low - CCI-000366 - V-93597 - SV-103683r2_rule

RMF Control

CM-6

Severity

Low

CCI

CCI-000366

Version

KNOX-09-000665

Vuln IDs

V-93597

Rule IDs

SV-103683r2_rule

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 should be disabled. SFR ID: FMT_SMF_EXT.1.1 #18h

Checks: C-92913r2_chk

Review device configuration settings to confirm that all Bluetooth profiles are disabled except HSP, HFP, and SPP, A2DP, AVRCP, and PBAP. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox Bluetooth" group, verify that only "HFP, HSP, SPP, A2DP, AVRCP, and PBAP" are selected in the "allowed profiles". On the Samsung Android device, verify that a Bluetooth peripheral that uses a profile other than HSP, HFP, SPP, A2DP, AVRCP, or PBAP (e.g., a Bluetooth keyboard) cannot be paired. If on the MDM console "allowed profiles" has any selection other than "HSP, HFP, SPP, A2DP, AVRCP, and PBAP", or the Samsung Android device is able to pair with a Bluetooth keyboard, this is a finding. Note: Disabling the Bluetooth radio will satisfy this requirement.

Fix: F-99841r2_fix

Configure Samsung Android to disable all Bluetooth profiles except HSP, HFP, SPP, A2DP, AVRCP, and PBAP. On the MDM console, for the device, in the "Knox Bluetooth" group, select "HFP, HSP, SPP, A2DP, AVRCP, and PBAP" in the "allowed profiles".

b

Samsung Android must be configured to disable USB mass storage mode.

CM-7 - Medium - CCI-000381 - V-93599 - SV-103685r1_rule

RMF Control

CM-7

Severity

Medium

CCI

CCI-000381

Version

KNOX-09-000685

Vuln IDs

V-93599

Rule IDs

SV-103685r1_rule

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 #39a

Checks: C-92915r1_chk

Review device configuration settings to confirm that USB mass storage mode has been disabled. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "disable USB media player" is selected. Connect the Samsung Android device to a non-DoD network-managed PC with a USB cable. On the PC, browse the mounted Samsung Android device and verify that it does not display any folders or files. If on the MDM console "disable USB media player" is not selected, or the PC can mount and browse folders and files on the Samsung Android device, this is a finding.

Fix: F-99843r1_fix

Configure Samsung Android to disable USB mass storage mode. On the MDM console, for the device, in the "Knox restrictions" group, select "disable USB media player".

c

Samsung Android must be configured to enable Knox Common Criteria (CC) Mode.

CM-6 - High - CCI-000366 - V-93601 - SV-103687r1_rule

RMF Control

CM-6

Severity

High

CCI

CCI-000366

Version

KNOX-09-000715

Vuln IDs

V-93601

Rule IDs

SV-103687r1_rule

The Knox Platform for Enterprise (KPE) 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. CC Mode implements the following behavioral/functional changes: - FOTA signature verification uses additional SHA-512 signature check. - Download Mode is disabled and all updates will occur via FOTA only. - IKEv1 operates in Main Mode only. - HTTPS audit logging in enabled. - Certificates without a Subject Alternative Name (SAN) field are rejected. - Certificates that do not pass Strict Host Name verification are rejected. - Certificates provided by servers must have the Extended Key Usage field set as Server Authentication. - Allows only authenticated Bluetooth connections. - Additional Key Zeroization is performed. Following is the list of prerequisites the user/MDM has to set in addition to calling CC Mode API to be fully compliant with the MDFPP requirements and the Samsung device Common Criteria certification: - Screen lock type: Alphanumeric or complex of type password, face disabled - Password Attempts: 1

Checks: C-92917r1_chk

Review device configuration settings to confirm that Knox CC Mode is enabled. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "enable CC mode" is selected. On the Samsung Android device, to verify that CC Mode has not failed, do the following: 1. Open Settings. 2. Tap "About phone". 3. Tap "Software information". 4. Verify that the Security software version for MDF does not display "Disabled". For Samsung Android devices prior to Galaxy S10, to verify that CC Mode is enabled, do the following: 1. Open Settings. 2. Tap "Biometric and security". 3. Tap "Secure startup". 4. Verify that "Do not require" is disabled. For Galaxy S10 (or newer devices), to verify that CC Mode is enabled, do the following: 1. Open Settings. 2. Tap "Biometric and security". 3. Verify that "Strong Protection" is enabled and cannot be disabled. If on the MDM console "enable CC mode" is not selected, or on the Samsung Android device the software version for "MDF" displays "Disabled", or on a Galaxy S10 (or newer device) "Strong Protection" can be disabled, or on a device older than a Galaxy S10 "Do not require" is not disabled, this is a finding.

Fix: F-99845r1_fix

Configure Samsung Android to enable Knox CC Mode. On the MDM console, for the device, in the "Knox restrictions" group, select "enable CC mode". The following configuration must also be implemented for the Samsung Android device to be operating in the NIAP-certified compliant CC mode of operation: - KNOX-09-001445/(KNOX-09-001475): Minimum password quality - KNOX-09-000505: Disable face - KNOX-09-000435/(KNOX-09-000445): Max password failures for local wipe - KNOX-09-001375/(KNOX-09-001365): Password recovery - KNOX-09-001395/(KNOX-09-001405): Password history length - KNOX-09-001055/(KNOX-09-001045): Revocation check - KNOX-09-001345/(KNOX-09-001335): OCSP check - KNOX-09-001425: Secure Startup (for devices prior to Galaxy S10) - KNOX-09-001485: Strong Protection (for Galaxy S10 or [newer] devices) - KNOX-09-000985: Enable external storage encryption Note: STIGIDs listed above not in parentheses are personal space requirements. STIGIDs in parentheses are workspace requirements.

b

Samsung Android must be configured to disallow configuration of date and time.

CM-6 - Medium - CCI-000366 - V-93603 - SV-103689r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000735

Vuln IDs

V-93603

Rule IDs

SV-103689r1_rule

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), or 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_SMF_EXT.1.1 #47

Checks: C-92919r1_chk

Review device configuration settings to confirm that configuration of the date and time is disallowed. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox Date Time" group, verify that "date time change enabled" is not selected. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "General management". 3. Tap "Date and time". 4. Verify that "Automatic date and time" is on and the user cannot disable it. If on the MDM console "date time change enabled" is selected, or on the Samsung Android device "Automatic date and time" is not set or the user can disable it, this is a finding.

Fix: F-99847r1_fix

Configure Samsung Android to disallow configuration of the date and time. On the MDM console, for the device, in the "Knox Date Time" group, unselect "date time change enabled".

b

Samsung Android must be configured to enforce a USB host mode exception list. Note: This configuration allows DeX mode (with input devices), which is DoD-approved for use.

CM-6 - Medium - CCI-000366 - V-93605 - SV-103691r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000755

Vuln IDs

V-93605

Rule IDs

SV-103691r1_rule

The USB host mode feature allows USB devices to connect to the device (e.g., USB flash drives, USB mouse, USB keyboard) using a micro USB-to-USB adapter cable. The USB host mode exception list allows selected USB devices to operate while disallowing others based on their USB device class. With some USB device classes, a user can copy sensitive DoD information to external USB storage unencrypted, resulting in compromise of DoD data. However, some USB device classes, such as Human Interface Devices (HID), do not allow data to be copied. Disabling all USB devices except for HID mitigates the risk of compromising sensitive DoD data. This allows for DeX mode to be used with a USB keyboard and mouse without compromising DoD data. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92921r1_chk

Review device configuration settings to confirm that the USB host mode exception list is configured. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "USB host mode exception list" is set with "HID". On the Samsung Android device, do the following: 1. Connect a micro USB-to-USB "On the Go" (OTG) adapter to the device. 2. Connect a USB thumb drive to the adapter. 3. Verify that the device cannot access the USB thumb drive. If on the MDM console "USB host mode exception list" has any selection other than "HID", or on the Samsung Android device the USB thumb drive can be mounted, this is a finding.

Fix: F-99849r1_fix

Configure Samsung Android with a USB host mode exception list. On the MDM console, for the device, in the "Knox restrictions" group, select "HID" in the "USB host mode exception list".

b

Samsung Android must be configured to disable the Share Via List feature.

CM-6 - Medium - CCI-000366 - V-93607 - SV-103693r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000775

Vuln IDs

V-93607

Rule IDs

SV-103693r1_rule

e Share Via List feature allows the transfer of data between nearby Samsung devices via Android Beam, Wi-Fi Direct, Link Sharing, and Share to Device. If sharing were enabled, sensitive DoD data could be compromised. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92923r1_chk

Review device configuration settings to confirm that Share Via List is disallowed. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "disallow share via list" is selected. On the Samsung Android device, in the device, attempt to share by long pressing a file and tapping "Share". If on the MDM console "disallow share via list" is not selected, or on the Samsung Android device the user is able to share, this is a finding.

Fix: F-99851r1_fix

Configure Samsung Android to disallow Share Via List. On the MDM console, for the device, in the "Knox restrictions" group, select "disallow share via list". Note: Disabling "share via list" will also disable functionality such as "Gallery Sharing" and "Direct Sharing".

b

Samsung Android must be configured to disallow outgoing beam.

CM-6 - Medium - CCI-000366 - V-93609 - SV-103695r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000805

Vuln IDs

V-93609

Rule IDs

SV-103695r1_rule

Outgoing beam allows transfer of data through near field communication (NFC) and Bluetooth by touching two unlocked devices together. If it were enabled, sensitive DoD data could be transmitted. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92925r1_chk

Review device configuration settings to confirm that Android beam is disabled. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "disable android beam" is selected. On the Samsung Android device, open a picture, contact, or webpage and put it back to back with an unlocked outgoing beam-enabled device. Verify that outgoing beam cannot be started. If on the MDM console "disable android beam" is not selected, or on the Samsung Android device the user is able to successfully start outgoing beam, this is a finding.

Fix: F-99853r1_fix

Configure Samsung Android to disable Android beam. On the MDM console, for the device, in the "Knox restrictions" group, select "disable android beam".

b

Samsung Android must be configured to enforce that Wi-Fi Sharing is disabled.

CM-6 - Medium - CCI-000366 - V-93611 - SV-103697r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-000825

Vuln IDs

V-93611

Rule IDs

SV-103697r1_rule

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

Checks: C-92927r1_chk

Review device configuration settings to confirm Wi-Fi Sharing is disabled. Mobile Hotspot must be enabled in order to enable Wi-Fi Sharing. If the Authorizing Official (AO) has not approved Mobile Hotspot, and it has been verified as disabled on the MDM console, the following guidance is not applicable. This setting cannot be managed by the MDM administrator and is a User-Based Enforcement (UBE) requirement. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Connections". 3. Tap "Mobile Hotspot and Tethering". 4. Tap "Mobile hotspot". 5. Verify that "Wi-Fi sharing" is disabled. If on the Samsung Android device "Wi-Fi sharing" is enabled, this is a finding.

Fix: F-99855r1_fix

Configure Samsung Android to disable Wi-Fi Sharing. Mobile Hotspot must be enabled in order to enable Wi-Fi Sharing. If the AO has not approved Mobile Hotspot, and it has been disabled on the MDM console, the following guidance is not applicable. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Connections". 3. Tap "Mobile Hotspot and Tethering". 4. Tap "Mobile hotspot". 5. Disable "Wi-Fi sharing" if it is enabled.

b

Samsung Android must be configured to not allow backup of [all applications, configuration data] to locally connected systems.

AC-20 - Medium - CCI-000097 - V-93613 - SV-103699r1_rule

RMF Control

AC-20

Severity

Medium

CCI

CCI-000097

Version

KNOX-09-000845

Vuln IDs

V-93613

Rule IDs

SV-103699r1_rule

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

Checks: C-92929r1_chk

Review device configuration settings to confirm backup to locally connected systems has been disabled. Disabling backup to locally connected systems is validated by the validation procedure in "Disable USB mass storage", which is included in KNOX-09-000685. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "disable USB media player" is selected. Connect the Samsung Android device to a non-DoD network-managed PC with a USB cable. On the PC, browse the mounted Samsung Android device and verify that it does not display any folders or files. If on the MDM console "disable USB media player" is not selected, or the PC can mount and browse folders and files on the Samsung Android device, this is a finding.

Fix: F-99857r1_fix

Configure Samsung Android to disable backup to locally connected systems. Disabling backup to locally connected systems is implemented by the configuration policy rule "Disable USB mass storage", which is included in KNOX-09-000685. On the MDM console, for the device, in the "Knox restrictions" group, select "disable USB media player".

b

Samsung Android must be configured to not allow backup of [all applications, configuration data] to remote systems.

AC-20 - Medium - CCI-002338 - V-93615 - SV-103701r1_rule

RMF Control

AC-20

Severity

Medium

CCI

CCI-002338

Version

KNOX-09-000865

Vuln IDs

V-93615

Rule IDs

SV-103701r1_rule

Backups to remote systems (including cloud backup) can leave data vulnerable to breach on the external systems, which often offer less protection than the mobile operating system. 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. Disallowing remote backup mitigates this risk. SFR ID: FMT_SMF_EXT.1.1 #40

Checks: C-92931r1_chk

Review device configuration settings to confirm that backup to a remote system has been disabled. This procedure is performed on the MDM Administration console and the Samsung device. On the MDM console, for the device, do the following: 1. In the "Knox restrictions" group, verify that "allow google backup" is not selected. 2. In the "Knox restrictions" group, verify that "allow google accounts auto sync" is not selected. 3. In the "Knox application" group, verify that the system application disable list contains all preinstalled cloud backup system apps. On the Samsung Android device: 1. Open Settings. 2. Tap "Accounts and backup". 3. Tap "Backup and restore". 4. Verify that "Backup my data" is disabled and cannot be enabled. 5. Tap back and tap "Accounts". 6. Tap a listed Google account. 7. Tap "Sync account" and verify that all sync options are disabled and cannot be enabled. 8. Review the apps on the "Personal" App screen and confirm that none of the cloud backup system apps are present. If on the MDM console "allow google backup" is selected or "allow google accounts auto sync" is selected, or on the Samsung Android device "Backup my data" can be enabled, "sync options" are enabled for a Google Account, or a "cloud backup" system app is present on the "Personal" App screen, this is a finding.

Fix: F-99859r1_fix

Configure the Samsung Android to disable backup to remote systems (including commercial clouds). On the MDM console, for the device, do the following: 1. In the "Knox restrictions" group, unselect "allow google backup". 2. In the "Knox restrictions" group, unselect "allow google accounts auto sync". 3. In the "Knox application" group, add all preinstalled public cloud backup system apps to the system application disable list if not already configured. Note: The guidance for disablement of system apps that have the characteristic "back up MD data to non-DoD cloud servers (including user and application access to cloud backup services)" is covered by KNOX-09-000105.

b

Samsung Android must be configured to disable developer modes.

CM-7 - Medium - CCI-000381 - V-93617 - SV-103703r1_rule

RMF Control

CM-7

Severity

Medium

CCI

CCI-000381

Version

KNOX-09-000925

Vuln IDs

V-93617

Rule IDs

SV-103703r1_rule

Developer modes expose features of the mobile operating system 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

Checks: C-92933r1_chk

Review device configuration settings to confirm developer mode is disallowed. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox restrictions" group, verify that "allow developer mode" is not selected. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "About phone". 3. Tap "Software information". 4. Keep tapping "Build number". 5. Verify that message "Developer mode has been enabled" is displayed but "Developer options" is not available in Settings. If on the MDM console "allow developer mode" is selected, or on the Samsung Android device "Developer options" can be enabled by the user, this is a finding.

Fix: F-99861r1_fix

Configure Samsung Android to disallow developer mode. On the MDM console, for the device, in the "Knox restrictions" group, unselect "allow developer mode".

b

Samsung Android must be configured to enable authentication of personal hotspot connections to the device using a preshared key.

AC-17 - Medium - CCI-002314 - V-93619 - SV-103705r1_rule

RMF Control

AC-17

Severity

Medium

CCI

CCI-002314

Version

KNOX-09-000945

Vuln IDs

V-93619

Rule IDs

SV-103705r1_rule

If no authentication is required to establish personal hotspot connections, 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. SFR ID: FMT_SMF_EXT.1.1 #41a

Checks: C-92937r1_chk

Review device configuration to confirm that unsecured hotspots are disallowed. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox Wifi" group, verify that "allow unsecured hotspot" is not selected. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Connections". 3. Tap "Mobile Hotspot and Tethering". 4. Tap "Mobile Hotspot". 5. Tap Overflow menu (three vertical dots). 6. Tap "Configure Mobile Hotspot". 7. Tap "Open in Security drop down". 8. Verify that "Save" is disabled. If on the MDM console "allow unsecured hotspot" is selected, or on the Samsung Android device an Open Mobile Hotspot configuration can be saved, this is a finding.

Fix: F-99865r1_fix

Configure Samsung Android to disallow unsecured hotspots. On the MDM console, in the Knox Wifi restrictions, unselect "allow unsecured hotspot".

c

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.

SC-28 - High - CCI-001199 - V-93621 - SV-103707r1_rule

RMF Control

SC-28

Severity

High

CCI

CCI-001199

Version

KNOX-09-000985

Vuln IDs

V-93621

Rule IDs

SV-103707r1_rule

The mobile operating system 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 #21, #47f

Checks: C-92939r1_chk

Review device configuration settings to determine if Knox external storage encryption is enabled. If the mobile device does not support removable media, this procedure is not applicable and is not a finding. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox encryption" group, verify that "enable external storage encryption" is selected. On the Samsung Android device, verify that a MicroSD card must be encrypted before use. If on the MDM console "enable external storage encryption" is not selected, or a MicroSD card can be used on the Samsung Android device without first being encrypted, this is a finding.

Fix: F-99867r1_fix

Configure Samsung Android to enable Knox external storage encryption. If the mobile device does not support removable media, this guidance is not applicable. On the MDM console, for the device, in the "Knox encryption" group, select "enable external storage encryption".

b

Samsung Android must be configured to enable Certificate Revocation List (CRL) status checking.

CM-6 - Medium - CCI-000366 - V-93623 - SV-103709r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-001055

Vuln IDs

V-93623

Rule IDs

SV-103709r1_rule

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. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92941r1_chk

Review device configuration settings to confirm that CRL checking is enabled for all apps. This procedure is performed on the MDM Administration console only. On the MDM console, for the device, in the "Knox certificate" group, verify that "revocation check" is configured to "enable for all apps". If on the MDM console "revocation check" is not configured to "enable for all apps", this is a finding.

Fix: F-99869r1_fix

Configure Samsung Android to enable CRL checking for all apps. On the MDM console, for the device, in the "Knox certificate" group, configure "revocation check" to "enable for all apps". Refer to the MDM documentation to determine how to configure revocation checking to "enable for all apps". Some may, for example, allow a wildcard string: "*" (asterisk).

a

Samsung Android must be configured to display the DoD advisory warning message at startup or each time the user unlocks the device.

AC-8 - Low - CCI-000048 - V-93627 - SV-103713r1_rule

RMF Control

AC-8

Severity

Low

CCI

CCI-000048

Version

KNOX-09-001165

Vuln IDs

V-93627

Rule IDs

SV-103713r1_rule

The mobile operating system is required to display the DoD-approved system use notification message or banner before granting access to the system 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 KS 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. See 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

Checks: C-92945r1_chk

Confirm if Method #1 or Method #2 is used at the Samsung device site and follow the appropriate procedure. **** Method #1: Review the signed user agreements for several Samsung device users and verify that the agreement includes the required DoD warning banner text. If the required DoD warning text is not included in all reviewed signed user agreements, this is a finding. **** Method #2: This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Knox banner" group, verify that the "banner text" is configured with the required DoD warning banner text. On the Samsung Android device, verify that that after a reboot the required DoD warning banner text is displayed. If on the MDM console the "banner text" is not configured with the required DoD warning banner text, or after a reboot the required DoD warning banner text is not displayed on the Samsung Android device, this is a finding.

Fix: F-99873r1_fix

Configure the DoD warning banner by either of the following methods (required text is found in the Vulnerability Discussion): - Method #1: Place the DoD warning banner text in the user agreement signed by each Samsung device user. - Method #2: Configure Samsung Android to display the DoD-mandated warning banner text. Use either Method #1 (preferred method) or Method #2. **** Method #1: Include the DoD warning banner text in the user agreement that will be signed by each Samsung device user. **** Method #2: On the MDM console, for the device, in the "Knox banner" group, configure the "banner text" with the DoD-mandated warning banner text. Note: On some MDM consoles, the Knox banner is automatically enabled while the Samsung Android device is enrolled. In this case, the above guidance is not applicable.

c

Samsung Android devices must have the latest available Samsung Android operating system installed.

CM-6 - High - CCI-000366 - V-93629 - SV-103715r1_rule

RMF Control

CM-6

Severity

High

CCI

CCI-000366

Version

KNOX-09-001305

Vuln IDs

V-93629

Rule IDs

SV-103715r1_rule

Required security features are not available in earlier operating system versions. In addition, there may be known vulnerabilities in earlier versions. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92947r1_chk

Review device configuration settings to confirm that the most recently released version of Samsung Android is installed. This procedure is performed on both the MDM console and the Samsung Android device. In the MDM management console, review the version of Samsung Android installed on a sample of managed devices. This procedure will vary depending on the MDM product. See the notes below to determine the latest available operating system version. On the Samsung Android device, to see the installed operating system version: 1. Open Settings. 2. Tap "About phone". 3. Tap "Software information". On the Samsung Android device, to confirm that the installed operating system is the latest released version: 1. Open Settings. 2. Tap "Software updates". 3. Tap "Check for system updates". 4. Verify that "No update is necessary at this time" is displayed. If the installed version of the Android operating system on any reviewed Samsung devices is not the latest released by the wireless carrier, this is a finding. Note: Some wireless carriers list the version of the latest Android operating system release by mobile device model online: - ATT: https://www.att.com/devicehowto/dsm.html#!/popular/make/Samsung - T-Mobile: https://support.t-mobile.com/docs/DOC-34510 - Verizon Wireless: https://www.verizonwireless.com/support/software-updates/ Google's Android operating system patch website: https://source.android.com/security/bulletin/ Samsung's Android operating system patch website: https://security.samsungmobile.com/securityUpdate.smsb

Fix: F-99875r1_fix

Install the latest released version of the Samsung Android operating system on all managed Samsung devices. Note: In most cases, operating system updates are released by the wireless carrier (for example, Sprint, T-Mobile, Verizon Wireless, and ATT).

b

Samsung Android must be configured to enable the Online Certificate Status Protocol (OCSP).

CM-6 - Medium - CCI-000366 - V-93631 - SV-103717r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-001345

Vuln IDs

V-93631

Rule IDs

SV-103717r1_rule

OCSP is a protocol for obtaining the revocation status of a certificate. It addresses problems associated with using Certificate Revocation Lists (CRLs). When OCSP is enabled, it is used prior to CRL checking. If OCSP could not get a decisive response about a certificate, it will then try to use CRL checking. The OCSP response server must be listed in the certificate information under Authority Info Access. This feature must be enabled for a Samsung Android device to be in the NIAP-certified Common Criteria (CC) mode of operation. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92949r1_chk

Review device configuration settings to confirm that OCSP checking is enabled for all apps. This procedure is performed on the MDM Administration console only. On the MDM console, for the device, in the "Knox certificate" group, verify that "OCSP check" is configured to "enable for all apps". If on the MDM console "OCSP check" is not configured to "enable for all apps", this is a finding.

Fix: F-99877r1_fix

Configure Samsung Android to enable OCSP checking for all apps. On the MDM, for the device, in the "Knox certificate" group, configure "OCSP check" to "enable for all apps". Refer to the MDM documentation to determine how to configure OCSP checking to "enable for all apps". Some may, for example, allow a wildcard string: "*" (asterisk).

b

Samsung Android must be configured to not enable Microsoft Exchange ActiveSync (EAS) password recovery. This requirement is not applicable if not using Microsoft EAS.

CM-6 - Medium - CCI-000366 - V-93633 - SV-103719r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-001375

Vuln IDs

V-93633

Rule IDs

SV-103719r1_rule

Password Recovery is a feature of Microsoft EAS. Exceeding the Password Attempts limit triggers the Lock screen to open a Password Recovery Mode. This feature must be disabled for a Samsung Android device to be in the NIAP-certified Common Criteria (CC) mode of operation. If Microsoft EAS Password Recovery is enabled, the Samsung device will be out of compliance with the CC mode configuration. This requirement is configured on the Exchange server. It is the responsibility of the DoD mobile service provider to ensure the Exchange server has been configured in compliance with the requirement. The requirement is only applicable if using Microsoft Exchange ActiveSync in the device (personal side). SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92951r1_chk

Verify that the Microsoft EAS password recovery has been disabled on the Exchange server. If on the Microsoft EAS server "password recovery" is not disabled, this is a finding.

Fix: F-99879r1_fix

Configure Samsung Android to not enable Microsoft EAS password recovery. The DoD mobile service provider should verify that the Exchange server is configured to disable Microsoft EAS password recovery.

b

Samsung Android must be configured to set the password history with a length of 0.

CM-6 - Medium - CCI-000366 - V-93635 - SV-103721r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-001395

Vuln IDs

V-93635

Rule IDs

SV-103721r1_rule

Password History Length controls the number of most recently used Passwords stored in the Password History list. The Password History list does not store the actual value of the previous passwords but instead calculates the hash value of the passwords. When the user attempts to set a new password, the hash value of the password is first calculated and the Password History list is checked to determine if it already contains a matching value, rejecting the password if it does. If the password is accepted, the oldest entry in the Password History list is removed, and the newly calculated password hash is added to the list. The MDFPP requires that values derived from passwords are destroyed when no longer needed; therefore, the calculated hash values of previous passwords should not be stored in the Password History list. This feature must be configured for a Samsung Android device to be in the NIAP-certified Common Criteria (CC) mode of operation. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92953r1_chk

Review device configuration settings to confirm that the password history is set to a length of "0". This procedure is performed on the MDM console only. On the MDM console, for the device, in the "Android password constraints" group, verify that "password history length" is set to "0". If on the MDM console "password history length" is not set to "0", this is a finding.

Fix: F-99881r1_fix

Configure Samsung Android to set the password history with a length of "0". On the MDM console, for the device, in the "Android password constraints" group, set "password history length" to "0".

b

Samsung Android must be configured to enforce that Secure Startup is enabled. This requirement is Not Applicable (NA) to Galaxy S10 (or newer) devices.

CM-6 - Medium - CCI-000366 - V-93637 - SV-103723r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-001425

Vuln IDs

V-93637

Rule IDs

SV-103723r1_rule

Secure Startup protects the Samsung Android device by requiring the user password to be entered before the device starts up. When Secure Startup is enabled, the default cryptographic keys are replaced with keys derived from the user password. This feature must be enabled for a Samsung Android device to be in the NIAP-certified Common Criteria (CC) mode of operation. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92955r1_chk

Review device configuration settings to confirm that Secure Startup is enabled. This procedure is performed on the Samsung Android device prior to Galaxy S10 only. This setting cannot be managed by the MDM administrator and is a User-Based Enforcement (UBE) requirement. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Biometric and security". 3. Tap "Other security settings". 4. Tap "Secure startup". 5. Verify that "Require password when device powers on" is already selected and "Do not require" is not selected. If on the Samsung Android device "Do not require" is selected, this is a finding.

Fix: F-99883r1_fix

Configure Samsung Android to enable Secure Startup. This guidance is only applicable to devices prior to Galaxy S10. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Biometrics and security". 3. Tap "Other security settings". 4. Tap "Secure startup". 5. Tap option "Require password when device powers on". 6. Tap "Apply". 7. Enter the current password.

b

Samsung Android must be configured to enable a screen-lock policy that will lock the display after a period of inactivity.

AC-11 - Medium - CCI-000057 - V-93639 - SV-103725r2_rule

RMF Control

AC-11

Severity

Medium

CCI

CCI-000057

Version

KNOX-09-001445

Vuln IDs

V-93639

Rule IDs

SV-103725r2_rule

The screen-lock timeout helps protect the device from unauthorized access. Devices without a screen-lock timeout provide an 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 and possibly access to DoD networks. Setting a lock type enables a screen-lock policy, and each lock type has a password strength. 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 do each attempt, and the size of the password space. A minimum level of complexity is needed to ensure a simple password or easily guessed password is not used. Configuring a minimum password complexity mitigates both the risk associated with an adversary acquiring a device in an unlocked state and a screen lock type with a weak authentication factor. SFR ID: FMT_SMF_EXT.1.1 #2a

Checks: C-92957r2_chk

Review device configuration settings to confirm that the device uses a screen-lock policy that will lock the display after a period of inactivity and that the lock type is configured with a minimum password quality. This procedure is performed on both the MDM Administration console and the Samsung Android device. On the MDM console, for the device, in the "Android password constraints" group, verify that the "minimum password quality" is "PIN" (see note). On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Lock screen". 3. Tap "Screen lock type". 4. Verify that "Swipe”, “Pattern”, and “None" cannot be enabled. If on the MDM console "minimum password quality" is not set to "PIN", or on the Samsung Android device the user can select a screen lock type other than "password", this is a finding. Note: Some MDM consoles may display “Numeric” and “Numeric-Complex” instead of “PIN”. Either selection is acceptable but “Numeric-Complex” is recommended. Alphabetic, Alphanumeric, and Complex are also acceptable selections but these selections will cause the user to select a complex password, which is not required by the STIG.

Fix: F-99885r2_fix

Configure Samsung Android to enforce a screen-lock policy that will lock the display after a period of inactivity with a lock type that is configured with a minimum password quality. On the MDM console, for the device, in the "Android password constraints" group, set "minimum password quality" (or password type) to "PIN”. Note: Some MDM consoles may display “Numeric” and “Numeric-Complex” instead of “PIN”. Either selection is acceptable but “Numeric-Complex” is recommended. Alphabetic, Alphanumeric, and Complex are also acceptable selections but these selections will cause the user to select a complex password, which is not required by the STIG.

b

Samsung Android must be configured to enforce that Strong Protection is enabled. This requirement is Not Applicable (NA) for devices older than Galaxy S10.

CM-6 - Medium - CCI-000366 - V-93641 - SV-103727r1_rule

RMF Control

CM-6

Severity

Medium

CCI

CCI-000366

Version

KNOX-09-001485

Vuln IDs

V-93641

Rule IDs

SV-103727r1_rule

Strong Protection protects the Samsung Android devices that use File Based Encryption (FBE). When Strong Protection is enabled, the default cryptographic keys used to protect the user's apps and data are replaced with keys derived from the user password. This feature must be enabled for a Samsung Android device to be in the NIAP-certified CC mode of operation. SFR ID: FMT_SMF_EXT.1.1 #47

Checks: C-92959r1_chk

Review device configuration settings to confirm that Strong Protection is enabled. This procedure is performed on the Samsung Android Galaxy S10 (or newer) devices only. This setting cannot be managed by the MDM administrator and is a User-Based Enforcement (UBE) requirement. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Biometric and security". 3. Tap "Other security settings". 4. Verify "Strong Protection" is enabled. If on the Samsung Android device, "Strong Protection” is disabled, this is a finding.

Fix: F-99887r1_fix

Configure Samsung Android to enable Strong Protection. This guidance is only applicable to Galaxy S10 (or newer) devices. On the Samsung Android device, do the following: 1. Open Settings. 2. Tap "Biometrics and security". 3. Tap "Other security settings". 4. Tap "Strong Protection". 5. Tap to enable. 6. Enter the current password.

Samsung Android OS 9 with Knox 3.x COBO Use Case KPE(Legacy) Deployment Security Technical Implementation Guide

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Checks: C-92271r1_chk

Fix: F-99199r1_fix

Checks: C-92273r1_chk

Fix: F-99201r1_fix

Checks: C-92275r1_chk

Fix: F-99203r1_fix

Checks: C-92277r1_chk

Fix: F-99205r1_fix

Checks: C-92885r1_chk

Fix: F-99813r1_fix

Checks: C-92889r1_chk

Fix: F-99817r1_fix

Checks: C-92891r1_chk

Fix: F-99819r1_fix

Checks: C-92893r1_chk

Fix: F-99821r1_fix

Checks: C-92895r1_chk

Fix: F-99823r1_fix

Checks: C-92897r1_chk

Fix: F-99825r1_fix

Checks: C-92899r1_chk

Fix: F-99827r1_fix

Checks: C-92901r1_chk

Fix: F-99829r1_fix

Checks: C-92903r1_chk

Fix: F-99831r1_fix

Checks: C-92905r1_chk

Fix: F-99833r1_fix

Checks: C-92907r1_chk

Fix: F-99835r1_fix

Checks: C-92909r1_chk

Fix: F-99837r1_fix

Checks: C-92911r1_chk

Fix: F-99839r1_fix

Checks: C-92913r2_chk

Fix: F-99841r2_fix

Checks: C-92915r1_chk

Fix: F-99843r1_fix

Checks: C-92917r1_chk

Fix: F-99845r1_fix

Checks: C-92919r1_chk

Fix: F-99847r1_fix

Checks: C-92921r1_chk

Fix: F-99849r1_fix

Checks: C-92923r1_chk

Fix: F-99851r1_fix

Checks: C-92925r1_chk

Fix: F-99853r1_fix

Checks: C-92927r1_chk

Fix: F-99855r1_fix

Checks: C-92929r1_chk

Fix: F-99857r1_fix

Checks: C-92931r1_chk

Fix: F-99859r1_fix

Checks: C-92933r1_chk

Fix: F-99861r1_fix

Checks: C-92937r1_chk

Fix: F-99865r1_fix

Checks: C-92939r1_chk

Fix: F-99867r1_fix

Checks: C-92941r1_chk

Fix: F-99869r1_fix

Checks: C-92945r1_chk

Fix: F-99873r1_fix

Checks: C-92947r1_chk

Fix: F-99875r1_fix

Checks: C-92949r1_chk

Fix: F-99877r1_fix

Checks: C-92951r1_chk

Fix: F-99879r1_fix

Checks: C-92953r1_chk

Fix: F-99881r1_fix

Checks: C-92955r1_chk

Fix: F-99883r1_fix

Checks: C-92957r2_chk

Fix: F-99885r2_fix

Checks: C-92959r1_chk