The Samsung Android 7 with Knox must be configured to lock the display after 15 minutes (or less) of inactivity.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-76519	KNOX-07-000500	SV-91215r1_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, 2b

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, 2b

STIG	Date
Samsung Android OS 7 with Knox 2.x Security Technical Implementation Guide	2019-10-01

Details

Check Text ( C-76179r1_chk )
Review Samsung Android 7 with Knox configuration settings to determine if the mobile device has the screen lock timeout set to 15 minutes or less. This validation procedure is performed on both the MDM Administration Console and the Samsung Android 7 with Knox device. On the MDM console, do the following: 1. Ask the MDM administrator to display the "Maximum Time to Lock" setting in the "Android Password Restrictions" rule. 2. Verify the value of the setting is "15" minutes or less. On the Samsung Android 7 with Knox device, do the following: 1. Unlock the device. 2. Refrain from performing any activity on the device for "15" minutes. 3. Verify the device requires the user to enter the device unlock password to access the device. If the MDM console "Maximum Time to Lock" is not set to "15" minutes or less for the screen lock timeout or on the Samsung Android 7 with Knox device, if after "15" minutes of inactivity the user does not have to enter password to unlock the device, this is a finding.

Check Text ( C-76179r1_chk )

Review Samsung Android 7 with Knox configuration settings to determine if the mobile device has the screen lock timeout set to 15 minutes or less.

This validation procedure is performed on both the MDM Administration Console and the Samsung Android 7 with Knox device.

On the MDM console, do the following:
1. Ask the MDM administrator to display the "Maximum Time to Lock" setting in the "Android Password Restrictions" rule.
2. Verify the value of the setting is "15" minutes or less.

On the Samsung Android 7 with Knox device, do the following:
1. Unlock the device.
2. Refrain from performing any activity on the device for "15" minutes.
3. Verify the device requires the user to enter the device unlock password to access the device.

If the MDM console "Maximum Time to Lock" is not set to "15" minutes or less for the screen lock timeout or on the Samsung Android 7 with Knox device, if after "15" minutes of inactivity the user does not have to enter password to unlock the device, this is a finding.

Fix Text (F-83201r1_fix)
Configure the Samsung Android 7 with Knox to lock the device display after "15" minutes (or less) of inactivity. On the MDM console, configure the "Maximum Time to Lock" option to "15" minutes in the "Android Password Restrictions" rule.