Title

Apple iOS/iPadOS 26 must disable the download of iOS/iPadOS beta updates. (Cat II impact)

Discussion

Beta operating system updates may contain features that could lead to the compromise of sensitive DOD information or provide a vector for the attack on the DOD network. The current STIG will not normally provide controls to disable these unsecure features. SFR ID: FMT_MOF_EXT.1.2 #47

Check Content

This is a supervised-only control. If the iPhone or iPad being reviewed is not supervised by the MDM, this control is automatically a finding. This check procedure is performed on both the device management tool and the iPhone and iPad. 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 management tool, verify "Allow installing configuration profiles (supervised only)" is unchecked. On the iPhone and iPad device: 1. Open the Settings app. 2. Tap "General". 3. Tap "VPN & Device Management". 4. Tap the Configuration Profile from the iOS management tool containing the restrictions policy. 5. Tap "Restrictions". 6. Verify "Installing configuration profiles not allowed" is listed. If "Allow installing configuration profiles" is not disabled in the management tool or on the Apple device "Installing configuration profiles not allowed" is not listed, this is a finding.

Fix Text

Install a configuration profile to disable the installation of new configuration profiles. This will block the download and installation of beta iOS and iPadOS updates. This is a supervised-only control. Configuration Profile Key: allowUIConfigurationProfileInstallation

Additional Identifiers

Rule ID: SV-278828r1150731_rule

Vulnerability ID: V-278828

Group Title: PP-MDF-993300

Expert Comments

CCIs tied to check.

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