Microsoft Android 11 must allow only the administrator (EMM) to install/remove DOD root and intermediate PKI certificates.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-255227	MSFT-11-009100	SV-255227r870839_rule		Medium

Description
DOD root and intermediate PKI certificates are used to verify the authenticity of PKI certificates of users and web services. If the user is allowed to remove root and intermediate certificates, the user could allow an adversary to falsely sign a certificate in such a way that it could not be detected. Restricting the ability to remove DOD root and intermediate PKI certificates to the Administrator mitigates this risk. SFR ID: FMT_MOF_EXT.1.2 #47

Description

DOD root and intermediate PKI certificates are used to verify the authenticity of PKI certificates of users and web services. If the user is allowed to remove root and intermediate certificates, the user could allow an adversary to falsely sign a certificate in such a way that it could not be detected. Restricting the ability to remove DOD root and intermediate PKI certificates to the Administrator mitigates this risk. SFR ID: FMT_MOF_EXT.1.2 #47

STIG	Date
Microsoft Android 11 COPE Security Technical Implementation Guide	2022-11-14

Details

Check Text ( C-58840r870773_chk )
Review the device configuration to confirm that the user is unable to remove DOD root and intermediate PKI certificates. On the EMM console: 1. Open "Set user restrictions". 2. Verify that "Disallow config credentials" is toggled to "On". On the Microsoft Android 11 device: 1. Open "Settings". 2. Tap "Security". 3. Tap "Advanced". 4. Tap "Encryption & credentials". 5. Tap "Trusted credentials". 6. Verify that the user is unable to untrust or remove any work certificates. If on the Microsoft Android 11 device the user is able to remove certificates, this is a finding.

Check Text ( C-58840r870773_chk )

Review the device configuration to confirm that the user is unable to remove DOD root and intermediate PKI certificates.

On the EMM console:
1. Open "Set user restrictions".
2. Verify that "Disallow config credentials" is toggled to "On".

On the Microsoft Android 11 device:
1. Open "Settings".
2. Tap "Security".
3. Tap "Advanced".
4. Tap "Encryption & credentials".
5. Tap "Trusted credentials".
6. Verify that the user is unable to untrust or remove any work certificates.

If on the Microsoft Android 11 device the user is able to remove certificates, this is a finding.

Fix Text (F-58784r869297_fix)
Configure Microsoft Android 11 device to prevent a user from removing DOD root and intermediate PKI certificates. On the EMM console: 1. Open "Set user restrictions". 2. Toggle "Disallow config credentials" to "On".