Title

Apple iOS must not allow non-DoD applications to access DoD data. (Cat II impact)

Discussion

Managed apps have been approved for the handling of DoD sensitive information. Unmanaged apps are provided for productivity and morale purposes, but are not approved to handle DoD sensitive information. Examples of unmanaged apps include apps 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 DoD data. In some cases, the unmanaged apps are connected to cloud backup or social networks that would permit dissemination of DoD sensitive information to unauthorized individuals. Not allowing data to be opened within unmanaged apps mitigates the risk of compromising sensitive data.

Check Content

This check procedure is performed on both the iOS Over-the-Air management tool and the iOS device. Note: If an organization has multiple configuration profiles, then the check procedure must be performed on the relevant configuration profiles applicable to the scope of the review. In the iOS Over-the-Air management tool, verify "Allow documents from managed apps in unmanaged apps" is unchecked. For example, in Apple Configurator: 1. Ask the MDM administrator to open the relevant configuration profile. 2. Display the "Restrictions" payload. 3. Verify "Allow documents from managed apps in unmanaged apps" is unchecked. Alternatively, verify the text "<key>allowOpenFromManagedToUnmanaged</key> <false/>" appears in the configuration profile (.mobileconfig file). On the iOS device: 1. Open the Settings app. 2. Tap "General". 3. Tap "Profiles". 4. Verify the profile from the iOS Over-the-Air management tool is present. If "Allow documents from managed apps in unmanaged apps" is checked in the iOS Over-the-Air management tool, "<key>allowOpenFromManagedToUnmanaged</key> <true/>" appears in the configuration profile, or the configuration profile from the iOS Over-the-Air management tool is not present on the iOS device, this is a finding.

Fix Text

Configure iOS and applications to prevent non-DoD applications from accessing DoD data. In the iOS Over-the-Air management tool, uncheck "Allow documents from managed apps in unmanaged apps". For example, in Apple Configurator, edit the configuration and uncheck "Allow documents from managed apps in unmanaged apps".

Additional Identifiers

Rule ID:

Vulnerability ID: V-43223

Group Title:

Expert Comments

CCIs tied to check.

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