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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-78379	AIOS-11-002500	SV-93085r1_rule		Medium

Description
Facial recognition systems can be used to authenticate the user in order to unlock the mobile device. At this time, the Apple iOS Face 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

Facial recognition systems can be used to authenticate the user in order to unlock the mobile device. At this time, the Apple iOS Face 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	2018-02-15

Details

Check Text ( C-77941r2_chk )
Review configuration settings to confirm "Allow Touch ID to unlock device" is disabled. Note: This control also controls Face ID. 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. Note: This requirement is applicable only for iOS devices that support Face ID (iPhone X). Note: The same control (“Allow Touch ID to unlock device”) enables/disables both Touch ID and Face ID. Therefore, it is recommended that Face ID-capable iOS devices (iPhone X) be placed in a separate management group from all other iOS devices so that when Face ID is disabled, devices supporting only Touch ID can still use the feature. In the iOS management tool, verify "Allow Touch ID to unlock device" is unchecked. 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 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-77941r2_chk )

Review configuration settings to confirm "Allow Touch ID to unlock device" is disabled. Note: This control also controls Face ID.

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.
Note: This requirement is applicable only for iOS devices that support Face ID (iPhone X).
Note: The same control (“Allow Touch ID to unlock device”) enables/disables both Touch ID and Face ID. Therefore, it is recommended that Face ID-capable iOS devices (iPhone X) be placed in a separate management group from all other iOS devices so that when Face ID is disabled, devices supporting only Touch ID can still use the feature.

In the iOS management tool, verify "Allow Touch ID to unlock device" is unchecked.

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 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-85111r2_fix)
Install a configuration profile to disable Face ID for device unlock. iOS devices with Face ID (for example, iPhone X) should be placed in a management group separate from other iOS devices without Face ID so that Face ID can be disabled. Note: The same control (“Allow Touch ID to unlock device”) enables/disables both Touch ID and Face ID. Therefore, it is recommended that Face ID-capable iOS devices (iPhone X) be placed in a separate management group from all other iOS devices so that when Face ID is disabled, devices supporting only Touch ID can still use the feature.

Fix Text (F-85111r2_fix)

Install a configuration profile to disable Face ID for device unlock. iOS devices with Face ID (for example, iPhone X) should be placed in a management group separate from other iOS devices without Face ID so that Face ID can be disabled.

Note: The same control (“Allow Touch ID to unlock device”) enables/disables both Touch ID and Face ID. Therefore, it is recommended that Face ID-capable iOS devices (iPhone X) be placed in a separate management group from all other iOS devices so that when Face ID is disabled, devices supporting only Touch ID can still use the feature.