Samsung Knox Android must synchronize the internal clock on an organization-defined periodic basis with an authoritative time server or the Global Positioning System.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-48277	KNOX-28-012600	SV-61149r1_rule		Low

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 two authoritative time sources for mobile operating systems are an authoritative time server which 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). Time stamps generated by the audit system in mobile operating systems shall 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: FPT_STM.1.1

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 two authoritative time sources for mobile operating systems are an authoritative time server which 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). Time stamps generated by the audit system in mobile operating systems shall 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: FPT_STM.1.1

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

Details

Check Text ( C-50709r2_chk )
This validation procedure is performed on both the MDM Administration Console and the Samsung Knox 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" checkbox in the "Android Restrictions" rule. 2. Verify the checkbox is selected. On the Samsung Knox Android device: 1. Open the device settings. 2. Select "Date and time". 3. Verify the "Automatic date and time" checkbox is checked. 4. Verify a user cannot deselect the "Automatic date and time" checkbox. If either the "Disable Manual Date Time Changes" checkbox is not checked on the MDM administration console; or the "Automatic date and time" checkbox is not checked on the device; or if it is possible to deselect this option on the device, this is a finding.

Check Text ( C-50709r2_chk )

This validation procedure is performed on both the MDM Administration Console and the Samsung Knox 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" checkbox in the "Android Restrictions" rule.
2. Verify the checkbox is selected.

On the Samsung Knox Android device:
1. Open the device settings.
2. Select "Date and time".
3. Verify the "Automatic date and time" checkbox is checked.
4. Verify a user cannot deselect the "Automatic date and time" checkbox.

If either the "Disable Manual Date Time Changes" checkbox is not checked on the MDM administration console; or the "Automatic date and time" checkbox is not checked on the device; or if it is possible to deselect this option on the device, this is a finding.

Fix Text (F-51885r1_fix)
Configure the mobile operating system to synchronize the internal clock at least once every 24 hours with an authoritative time server or the Global Positioning System. On the MDM Console, check the "Disable Manual Date Time Changes" checkbox in the "Android Restrictions" rule.