Apple iOS must not include applications with the following characteristics: Siri when the device is locked.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-78369	AIOS-11-001200	SV-93075r1_rule		Medium

Description
On Apple iOS devices, users can access the device's contact database or calendar to obtain phone numbers and other information using a human voice even when the mobile device is locked. Often this information is Personally Identifiable Information (PII), which is considered sensitive. It could also be used by an adversary to profile the user or engage in social engineering to obtain further information from other unsuspecting users. Disabling access to the contact database and calendar in these situations mitigates the risk of this attack. The AO may waive this requirement with written notice if the operational environment requires this capability. SFR ID: FMT_SMF_EXT.1.1 #8b

Description

On Apple iOS devices, users can access the device's contact database or calendar to obtain phone numbers and other information using a human voice even when the mobile device is locked. Often this information is Personally Identifiable Information (PII), which is considered sensitive. It could also be used by an adversary to profile the user or engage in social engineering to obtain further information from other unsuspecting users. Disabling access to the contact database and calendar in these situations mitigates the risk of this attack. The AO may waive this requirement with written notice if the operational environment requires this capability. SFR ID: FMT_SMF_EXT.1.1 #8b

STIG	Date
Apple iOS 11 Security Technical Implementation Guide	2018-02-15

Details

Check Text ( C-77931r1_chk )
Review configuration settings to confirm that Siri is disabled on the Lock screen. 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 Apple iOS management tool, verify "Allow Siri while device is locked" is unchecked. Alternatively, verify the text "allowAssistantWhileLocked" appears in the configuration profile (.mobileconfig file). On the Apple iOS device: 1. Open the Settings app. 2. Tap "General". 3. Tap "Profiles & Device Management". 4. Tap the Configuration Profile from the Apple iOS management tool containing the restrictions policy. 5. Tap "Restrictions". 6. Verify "Siri while locked not allowed" is listed. If "Allow Siri while device is locked" is checked in the Apple iOS management tool, "allowAssistantWhileLocked" appears in the configuration profile, or the restrictions policy on the Apple iOS device from the Apple iOS management tool does not list "Siri while locked not allowed", this is a finding.

Check Text ( C-77931r1_chk )

Review configuration settings to confirm that Siri is disabled on the Lock screen.

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 Apple iOS management tool, verify "Allow Siri while device is locked" is unchecked.

Alternatively, verify the text "allowAssistantWhileLocked" appears in the configuration profile (.mobileconfig file).

On the Apple iOS device:
1. Open the Settings app.
2. Tap "General".
3. Tap "Profiles & Device Management".
4. Tap the Configuration Profile from the Apple iOS management tool containing the restrictions policy.
5. Tap "Restrictions".
6. Verify "Siri while locked not allowed" is listed.

If "Allow Siri while device is locked" is checked in the Apple iOS management tool, "allowAssistantWhileLocked" appears in the configuration profile, or the restrictions policy on the Apple iOS device from the Apple iOS management tool does not list "Siri while locked not allowed", this is a finding.

Fix Text (F-85101r1_fix)
Install a configuration profile to disable Siri while the device is locked.