The mobile device must be set to lock the device after a set period of user inactivity.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-25010	WIR-MOS-iOS-G-016	SV-30795r3_rule	PESL-1	Medium

Description
Sensitive DoD data could be compromised if the CMD does not automatically lock after 15 minutes of inactivity.

STIG	Date
Apple iOS 6 Security Technical Implementation Guide (STIG)	2013-05-23

Details

Check Text ( C-31213r7_chk )
1. Make a list of all iOS security policies listed on the MDM server that have been assigned to iOS devices and review each policy. 2. Select each security policy iOS devices are assigned to and, in turn, verify the required settings are in the policy. Verify that "Grace period" is checked and the sum of the "Auto-Lock" and "Grace period" values is 15 minutes or less. Acceptable combinations include a 15-minute "Auto-Lock" and an "Immediate" (or null) "Grace period", or a 5-minute "Auto-Lock" and a 5-minute "Grace period". On some MDM systems, the "Grace period" may be called "Passcode Lock" or a similar label. If the required rule is not set up on the MDM server, this is a finding. Note: If there is a finding, note the name of the policy in the Findings Details section in VMS/Component Provided Tracking Database.

Check Text ( C-31213r7_chk )

1. Make a list of all iOS security policies listed on the MDM server that have been assigned to iOS devices and review each policy.
2. Select each security policy iOS devices are assigned to and, in turn, verify the required settings are in the policy. Verify that "Grace period" is checked and the sum of the "Auto-Lock" and "Grace period" values is 15 minutes or less. Acceptable combinations include a 15-minute "Auto-Lock" and an "Immediate" (or null) "Grace period", or a 5-minute "Auto-Lock" and a 5-minute "Grace period". On some MDM systems, the "Grace period" may be called "Passcode Lock" or a similar label.

If the required rule is not set up on the MDM server, this is a finding.

Note: If there is a finding, note the name of the policy in the Findings Details section in VMS/Component Provided Tracking Database.

Fix Text (F-27661r4_fix)
Enforce the CMD inactivity timeout requirement of 15 minutes or less through a combination of "Auto-Lock" and "Grace period" values that do not sum to greater than 15 minutes.