The Samsung KNOX for Android platform must be configured to disable manual date and time changes.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-69671	KNOX-38-012600	SV-84293r1_rule		Medium

Description
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 needed in order to correctly correlate the timing of events that occur across the enterprise. The three authoritative time sources for mobile operating systems 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 mobile operating systems 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 #45

Description

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 needed in order to correctly correlate the timing of events that occur across the enterprise. The three authoritative time sources for mobile operating systems 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 mobile operating systems 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 #45

STIG	Date
Samsung Android OS 6 (with KNOX 2.x) Security Technical Implementation Guide	2016-11-14

Details

Check Text ( C-70113r1_chk )
This validation procedure is performed on both the MDM Administration Console and the Samsung KNOX for Android device. Check whether the appropriate setting is configured on the MDM Administration Console: 1. Ask the MDM administrator to display the "Disable Manual Date Time Changes" check box in the "Android Restrictions" rule. 2. Verify the check box is selected. On the Samsung KNOX for Android device: 1. Open the device settings. 2. Select "Date and time". 3. Verify the "Automatic date and time" is on. 4. Verify a user cannot turn off the "Automatic date and time". If the "Disable Manual Date Time Changes" check box is not checked on the MDM administration console or the "Automatic date and time" is set to "off" on the device, or if it is possible to turn off this option on the device, this is a finding.

Check Text ( C-70113r1_chk )

This validation procedure is performed on both the MDM Administration Console and the Samsung KNOX for Android device.

Check whether the appropriate setting is configured on the MDM Administration Console:
1. Ask the MDM administrator to display the "Disable Manual Date Time Changes" check box in the "Android Restrictions" rule.
2. Verify the check box is selected.

On the Samsung KNOX for Android device:
1. Open the device settings.
2. Select "Date and time".
3. Verify the "Automatic date and time" is on.
4. Verify a user cannot turn off the "Automatic date and time".

If the "Disable Manual Date Time Changes" check box is not checked on the MDM administration console or the "Automatic date and time" is set to "off" on the device, or if it is possible to turn off this option on the device, this is a finding.

Fix Text (F-75875r1_fix)
Configure the mobile operating system to synchronize the internal clock at least once every 24 hours with an authoritative time server or the GPS. On the MDM Console, select the "Disable Manual Date Time Changes" check box in the "Android Restrictions" rule.