Samsung Knox Android must allow only the administrator/MDM to set the screen lock timeout.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-48307	KNOX-24-007400	SV-61179r1_rule		Medium

Description
Users must not be able to override the system policy on the screen lock timeout because this could allow them to effectively disable the timeout (e.g., by setting the timeout to 0 minutes) or to set the timeout for such a long duration as to make it nearly ineffective. Either of these 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. Therefore, only administrators and the MDM software should have the authority to set screen lock timeout policies. SFR ID: FMT_MOF.1.1(2) #02

Description

Users must not be able to override the system policy on the screen lock timeout because this could allow them to effectively disable the timeout (e.g., by setting the timeout to 0 minutes) or to set the timeout for such a long duration as to make it nearly ineffective. Either of these 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. Therefore, only administrators and the MDM software should have the authority to set screen lock timeout policies. SFR ID: FMT_MOF.1.1(2) #02

STIG	Date
Samsung Android (with Knox 1.x) STIG	2014-04-22

Details

Check Text ( C-50739r3_chk )
Note: This validation procedure is identical to the one for KNOX-25-013600. It only needs to be performed once. If it is found compliant on the first check, it is also compliant here. If it is determined to be a finding on the first check, it is also a finding here. Redundant checks are necessary to maintain requirements traceability and provide complete risk management information to the DAAs. This validation procedure is performed on the Samsung Knox Android device only. On the Samsung Knox Android device: 1. Open the application list. 2. Verify the presence of an MDM agent. Note: Verification on the MDM agent is MDM vendor specific. For example, on the Fixmo MDM agent, open the MDM agent, press the Menu button and select "Details". 1. Verify Profile ID is not "NULL". 2. Press the Menu button. 3. Select "Poll Server". 4. Verify no errors are generated in the messages list. On the AirWatch MDM agent: 1. Open the MDM agent. 2. Select "Device Status". 3. Verify "Enrollment Status" is enrolled. If the MDM agent is not present on the Samsung Knox Android device, or if the MDM vendor specific checks do not show the proper value, this is a finding.

Check Text ( C-50739r3_chk )

Note: This validation procedure is identical to the one for KNOX-25-013600. It only needs to be performed once. If it is found compliant on the first check, it is also compliant here. If it is determined to be a finding on the first check, it is also a finding here. Redundant checks are necessary to maintain requirements traceability and provide complete risk management information to the DAAs.

This validation procedure is performed on the Samsung Knox Android device only.

On the Samsung Knox Android device:
1. Open the application list.
2. Verify the presence of an MDM agent.
Note: Verification on the MDM agent is MDM vendor specific.

For example, on the Fixmo MDM agent, open the MDM agent, press the Menu button and select "Details".
1. Verify Profile ID is not "NULL".
2. Press the Menu button.
3. Select "Poll Server".
4. Verify no errors are generated in the messages list.

On the AirWatch MDM agent:
1. Open the MDM agent.
2. Select "Device Status".
3. Verify "Enrollment Status" is enrolled.

If the MDM agent is not present on the Samsung Knox Android device, or if the MDM vendor specific checks do not show the proper value, this is a finding.

Fix Text (F-51915r2_fix)
Implement the MDM to centrally manage configuration settings.