Title

Apple iOS must not allow the device to be unlocked using a fingerprint. (Cat I impact)

Discussion

Touch ID is a fingerprint reader that has been installed on some models of iOS devices. This fingerprint reader can be used to authenticate the user in order to unlock the mobile device. At this time, no biometric reader has been approved for DoD use on mobile devices. This technology would allow unauthorized users to have access to DoD-sensitive data if compromised. By not permitting the use of Touch ID, users are forced to use passcodes that meet DoD passcode requirements. SFR ID: FMT_SMF.1.1 #42

Check Content

Review configuration settings to confirm “Allow Touch ID to unlock device” is disabled. This check procedure is performed on both the iOS 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 management tool, verify "Allow Touch ID to unlock device" is unchecked. Alternatively, verify the text "<key>allowFingerprintForUnlock</key><false/>" appears in the configuration profile (.mobileconfig file). On the iOS device: 1. Open the Settings app. 2. Tap "General". 3. Tap "Profiles" or "Profiles & Device Management" or "Device Management". 4. Tap the Configuration Profile from the iOS management tool containing the restrictions policy. 5. Tap "Restrictions". 6. Verify "Touch ID unlock not allowed" is listed. If "Allow Touch ID to unlock device" is checked in the iOS management tool, "<key>allowFingerprintForUnlock</key><true/>" appears in the configuration profile, or “Touch ID unlock not allowed" is not listed on the iOS device, this is a finding.

Fix Text

Install a Configuration Profile to disable Touch ID for device unlock.

Additional Identifiers

Rule ID:

Vulnerability ID: V-54269

Group Title:

Expert Comments

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