Apple iOS must be configured to disable authentication mechanisms providing user access to protected data other than a Password Authentication Factor, including [selection: Touch ID).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-78377	AIOS-11-002400	SV-93083r1_rule		Medium

Description
The fingerprint reader can be used to authenticate the user in order to unlock the mobile device. At this time, the Apple iOS Touch ID has not been evaluated by the NIAP to confirm it meets the security requirements of the MDFPP or been approved for DoD use on mobile devices. This technology could allow unauthorized users to have access to DoD sensitive data if compromised. By not permitting the use of non-password authentication mechanisms, users are forced to use passcodes that meet DoD passcode requirements. SFR ID: FMT_SMF_EXT.1.1 #23, FIA_UAU.5.1

Description

The fingerprint reader can be used to authenticate the user in order to unlock the mobile device. At this time, the Apple iOS Touch ID has not been evaluated by the NIAP to confirm it meets the security requirements of the MDFPP or been approved for DoD use on mobile devices. This technology could allow unauthorized users to have access to DoD sensitive data if compromised. By not permitting the use of non-password authentication mechanisms, users are forced to use passcodes that meet DoD passcode requirements. SFR ID: FMT_SMF_EXT.1.1 #23, FIA_UAU.5.1

STIG	Date
Apple iOS 11 Security Technical Implementation Guide	2017-12-14

Details

Check Text ( C-77939r1_chk )
If the Authorizing Official (AO) has approved the use of Touch ID, this requirement is not applicable. Verify written AO approval is available at the site. Review configuration settings to confirm "Allow Touch ID to unlock device" is disabled. This check procedure is performed on both the Apple iOS management tool and the Apple iOS 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 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 & 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 the restrictions policy on the Apple iOS device from the Apple iOS management tool does not list "Touch ID unlock not allowed", this is a finding.

Check Text ( C-77939r1_chk )

If the Authorizing Official (AO) has approved the use of Touch ID, this requirement is not applicable. Verify written AO approval is available at the site.

Review configuration settings to confirm "Allow Touch ID to unlock device" is disabled.

This check procedure is performed on both the Apple iOS management tool and the Apple iOS 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 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 & 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 the restrictions policy on the Apple iOS device from the Apple iOS management tool does not list "Touch ID unlock not allowed", this is a finding.

Fix Text (F-85109r1_fix)
Install a configuration profile to disable Touch ID for device unlock.