Title

LG Android 6.x must implement the management setting: Disable System Time Changes. (Cat II impact)

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 LG Android device. On the MDM console, do the following: 1. Ask the MDM administrator to display the "Disable System Time Changes" check box in the "Android Restrictions" rule. 2. Verify the check box is selected. 3. Verify the policy has been assigned to all groups. On the LG Android device: 1. Navigate to Settings >> General >> Date & time. 2. Verify the "Auto-date & time" checkbox is checked and cannot be changed (grayed out). If on the MDM console "Disable System Time Changes" is not enabled or on the LG Android device "Auto-date & time" is not enabled or can be changed, this is a finding.

Fix Text

Configure the mobile operating system to disable system time changes, to synchronize the internal clock with network-provided time. On the MDM Console, select the "Disable System Time Changes" checkbox in the "Android Restrictions" rule.

Additional Identifiers

Rule ID: SV-81373r2_rule

Vulnerability ID: V-66883

Group Title:

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.