The Samsung Knox for Android platform must implement the management setting: Disable Manual Date Time Changes.

From Samsung Android OS 5 with Knox 2.0 Security Technical Implementation Guide

Part of PP-MDF-991000

Associated with: CCI-000366

SV-75715r1_rule The Samsung Knox for Android platform must implement the management setting: Disable Manual Date Time Changes.

Vulnerability discussion

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 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: FMT_SMF_EXT.1.1 #45

Check content

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" check box is checked. 4. Verify a user cannot deselect the "Automatic date and time" check box. If either the "Disable Manual Date Time Changes" check box is not checked on the MDM administration console; or the "Automatic date and time" check box is not selected on the device; or if it is possible to deselect this option on the device, this is a finding.

Fix text

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, select the "Disable Manual Date Time Changes" check box in the "Android Restrictions" rule.

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