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← Back to Apple iOS/iPadOS 27 Security Technical Implementation Guide

V-288413

CAT III (Low)

Apple iOS/iPadOS 27 must not allow managed apps to write contacts to unmanaged contacts accounts.

Rule ID

SV-288413r1287654_rule

STIG

Apple iOS/iPadOS 27 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-000366

Discussion

Managed apps have been approved for the handling of DoW sensitive information. Unmanaged apps are provided for productivity and morale purposes but are not approved to handle DoW sensitive information. Examples of unmanaged apps include those for news services, travel guides, maps, and social networking. If a document were to be viewed in a managed app and the user had the ability to open this same document in an unmanaged app, this could lead to the compromise of sensitive DoW data. In some cases, the unmanaged apps are connected to cloud backup or social networks that would permit dissemination of DoW sensitive information to unauthorized individuals. Not allowing data to be opened within unmanaged apps mitigates the risk of compromising sensitive data. SFR ID: FMT_SMF_EXT.1.1 #42, FDP_ACF_EXT.1.2

Check Content

Review configuration settings to confirm "Allow managed apps to write contacts to unmanaged contacts accounts" is disabled.

This check procedure is performed on both the Apple iOS/iPadOS management tool and the Apple iOS/iPadOS device.

Note: If an organization has multiple configuration profiles, the check procedure must be performed on the relevant configuration profiles applicable to the scope of the review. 

In the iOS/iPadOS management tool, verify "Allow managed apps to write contacts to unmanaged contacts accounts" is unchecked.

On the iPhone and iPad:
1. Open the Settings app.
2. Tap "General".
3. Tap "VPN & Device Management". 
4. Tap the Configuration Profile from the iOS/iPadOS management tool containing the restrictions policy.
5. Tap "Restrictions".
6. Verify "Managed apps write to unmanaged contacts allowed" is not listed.

If "Allow managed apps to write contacts to unmanaged contacts accounts" is checked in the iOS/iPadOS management tool or the restrictions policy on the iPhone and iPad lists "Managed apps write to unmanaged contacts allowed", this is a finding.

Fix Text

Install a configuration profile to prevent managed apps from writing contacts to unmanaged contacts accounts.

Configuration Profile Key: allowManagedToWriteUnmanagedContacts

This payload can only be installed via an MDM.