Apple iOS must implement the management setting: remove managed applications upon unenrollment from MDM.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-71877	AIOS-10-080102	SV-86501r1_rule		Medium

Description
When a device is unenrolled from MDM, it is possible to relax the security policies that the MDM had implemented on the device. This may cause apps and data to be more vulnerable than they were prior to enrollment. Removing managed apps (and consequently the data they maintain) upon unenrollment mitigates this risk because on appropriately configured Apple iOS devices, DoD-sensitive information exists only within managed apps. SFR ID: FMT_SMF_EXT.1.1 #45

Description

When a device is unenrolled from MDM, it is possible to relax the security policies that the MDM had implemented on the device. This may cause apps and data to be more vulnerable than they were prior to enrollment. Removing managed apps (and consequently the data they maintain) upon unenrollment mitigates this risk because on appropriately configured Apple iOS devices, DoD-sensitive information exists only within managed apps. SFR ID: FMT_SMF_EXT.1.1 #45

STIG	Date
Apple iOS 10 Security Technical Implementation Guide	2016-11-22

Details

Check Text ( C-72109r1_chk )
Note: The procedure below is exactly the same for requirement AIOS-11-080202. This procedure needs to be performed only once. Note: Not all Apple iOS deployments involve MDM. If the site uses an authorized alternative to MDM for distribution of configuration profiles (Apple Configurator), this check procedure is not applicable. This check procedure is performed on the Apple iOS management tool. In the Apple iOS management tool, for each managed app, verify the app is configured to be removed when the MDM profile is removed. If one or more managed apps are not set to be removed upon device MDM unenrollment, this is a finding.

Check Text ( C-72109r1_chk )

Note: The procedure below is exactly the same for requirement AIOS-11-080202. This procedure needs to be performed only once.

Note: Not all Apple iOS deployments involve MDM. If the site uses an authorized alternative to MDM for distribution of configuration profiles (Apple Configurator), this check procedure is not applicable.

This check procedure is performed on the Apple iOS management tool.

In the Apple iOS management tool, for each managed app, verify the app is configured to be removed when the MDM profile is removed.

If one or more managed apps are not set to be removed upon device MDM unenrollment, this is a finding.

Fix Text (F-78229r1_fix)
Install a configuration profile to delete all managed apps upon device unenrollment.