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

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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-260446	KNOX-14-710090	SV-260446r953771_rule		Medium

Description
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

Description

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

STIG	Date
Samsung Android 14 MDFPP 3.3 BYOAD Security Technical Implementation Guide	2024-02-21

Details

Check Text ( C-64176r953771_chk )
Review the configuration to determine if the Samsung Android devices' Work Environment is disabling Trust Agents. This validation procedure is performed on both the management tool and the Samsung Android device. On the management tool, in the device restrictions, verify that "Trust Agents" are set to "Disable". On the Samsung Android device, confirm if the user has "One Lock" enabled (Settings >> Security and privacy >> More security settings >> Work profile security >> Use one lock). If "One Lock" is enabled: 1. Open Settings >> Security and privacy >> More security settings >> Trust agents. 2. Verify that all listed Trust Agents are disabled and cannot be enabled. The disablement of Trust Agents cannot be verified while "One Lock" is disabled, as they are not an available feature for Work profiles. To verify, the Admin would need to temporarily enable "One Lock" for the purpose of testing only and follow the above instruction. After testing, the User would have to reset their Work profile password when "One Lock" was turned off again. If on the management tool "Trust Agents" are not set to "Disable", or on the Samsung Android device a "Trust Agent" can be enabled, this is a finding. Note: If the management tool has been correctly configured but a Trust Agent is still enabled, configure the "List of approved apps listed in managed Google Play" to disable it; refer to KNOX-14-710190. Exception: Trust Agents may be used if the Authorizing Official (AO) allows a screen lock timeout after four hours (or more) of inactivity. This may be applicable to tactical use case.

Check Text ( C-64176r953771_chk )

Review the configuration to determine if the Samsung Android devices' Work Environment is disabling Trust Agents.

This validation procedure is performed on both the management tool and the Samsung Android device.

On the management tool, in the device restrictions, verify that "Trust Agents" are set to "Disable".

On the Samsung Android device, confirm if the user has "One Lock" enabled (Settings >> Security and privacy >> More security settings >> Work profile security >> Use one lock).

If "One Lock" is enabled:
1. Open Settings >> Security and privacy >> More security settings >> Trust agents.
2. Verify that all listed Trust Agents are disabled and cannot be enabled.

The disablement of Trust Agents cannot be verified while "One Lock" is disabled, as they are not an available feature for Work profiles. To verify, the Admin would need to temporarily enable "One Lock" for the purpose of testing only and follow the above instruction. After testing, the User would have to reset their Work profile password when "One Lock" was turned off again.

If on the management tool "Trust Agents" are not set to "Disable", or on the Samsung Android device a "Trust Agent" can be enabled, this is a finding.

Note: If the management tool has been correctly configured but a Trust Agent is still enabled, configure the "List of approved apps listed in managed Google Play" to disable it; refer to KNOX-14-710190.

Exception: Trust Agents may be used if the Authorizing Official (AO) allows a screen lock timeout after four hours (or more) of inactivity. This may be applicable to tactical use case.

Fix Text (F-64083r950916_fix)
Configure the Samsung Android devices to disable Trust Agents. On the management tool, in the device restrictions, set "Trust Agents" to "Disable".