Apple iOS must be configured to disable Touch ID.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-61919	AIOS-02-080013	SV-76409r1_rule		Medium

Description
Many mobile devices now permit a user to unlock the user's device by presenting a fingerprint to an embedded fingerprint reader. Other biometrics and token-based systems are feasible as well. None of these alternatives are currently evaluated in a Common Criteria evaluation of a mobile device against the Security Target based on the Mobile Device Fundamentals Protection Profile. Many have known vulnerabilities. Until there are DoD-approved assurance activities to evaluate the efficacy of these alternatives, they are significant potential vulnerabilities to DoD information and information systems. Disabling them mitigates the risk of their use. Touch ID is a fingerprint reader that has been installed on some models of Apple iOS devices. SFR ID: FMT_SMF_EXT.1.1 #33

Description

Many mobile devices now permit a user to unlock the user's device by presenting a fingerprint to an embedded fingerprint reader. Other biometrics and token-based systems are feasible as well. None of these alternatives are currently evaluated in a Common Criteria evaluation of a mobile device against the Security Target based on the Mobile Device Fundamentals Protection Profile. Many have known vulnerabilities. Until there are DoD-approved assurance activities to evaluate the efficacy of these alternatives, they are significant potential vulnerabilities to DoD information and information systems. Disabling them mitigates the risk of their use. Touch ID is a fingerprint reader that has been installed on some models of Apple iOS devices. SFR ID: FMT_SMF_EXT.1.1 #33

STIG	Date
Apple iOS 9 Interim Security Configuration Guide	2015-12-07

Details

Check Text ( C-62801r1_chk )
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 "allowFingerprintForUnlock" 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, "allowFingerprintForUnlock" appears in the configuration profile, or “Touch ID unlock not allowed" is not listed on the iOS device, this is a finding.

Check Text ( C-62801r1_chk )

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 "allowFingerprintForUnlock" 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, "allowFingerprintForUnlock" appears in the configuration profile, or “Touch ID unlock not allowed" is not listed on the iOS device, this is a finding.

Fix Text (F-67837r1_fix)
Install a Configuration Profile to disable Touch ID for device unlock.