Samsung Android 8 with Knox must implement the management setting: Account blacklist.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-80163	KNOX-08-000200	SV-94867r1_rule		Medium

Description
Blacklisting all email accounts is required so only whitelisted accounts can be configured. SFR ID: FMT_SMF_EXT.1.1 #47

STIG	Date
Samsung Android OS 8 with Knox 3.x COBO Use Case Security Technical Implementation Guide	2019-10-01

Details

Check Text ( C-79831r1_chk )
Review Samsung Android 8 with Knox configuration settings to determine if the mobile device is enforcing Account Blacklisting. This validation procedure is performed on both the MDM Administration Console and the Samsung Android 8 with Knox device. On the MDM console, do the following: 1. Ask the MDM Administrator to display the "Account blacklist" setting in the "Android Accounts" rule. 2. Verify the setting is configured to all email domains not approved by DoD. Note: All email domains are specified by the wildcard string ".*" On the Samsung Android 8 with Knox device, do the following: 1. Open device settings. 2. Select "Accounts". 3. Select "Accounts". 4. Select "Add account". 5. Select "Email" (and repeat for Microsoft Exchange ActiveSync) and attempt to add an email account with a non-approved domain. 6. Verify the email account cannot be added. If the MDM console "Account blacklist" is not set to all email domains not approved by DoD or on the Samsung Android 8 with Knox device, the user is able to successfully configure the non-DoD-approved email account, this is a finding.

Check Text ( C-79831r1_chk )

Review Samsung Android 8 with Knox configuration settings to determine if the mobile device is enforcing Account Blacklisting.

This validation procedure is performed on both the MDM Administration Console and the Samsung Android 8 with Knox device.

On the MDM console, do the following:
1. Ask the MDM Administrator to display the "Account blacklist" setting in the "Android Accounts" rule.
2. Verify the setting is configured to all email domains not approved by DoD.
Note: All email domains are specified by the wildcard string ".*"

On the Samsung Android 8 with Knox device, do the following:
1. Open device settings.
2. Select "Accounts".
3. Select "Accounts".
4. Select "Add account".
5. Select "Email" (and repeat for Microsoft Exchange ActiveSync) and attempt to add an email account with a non-approved domain.
6. Verify the email account cannot be added.

If the MDM console "Account blacklist" is not set to all email domains not approved by DoD or on the Samsung Android 8 with Knox device, the user is able to successfully configure the non-DoD-approved email account, this is a finding.

Fix Text (F-86969r1_fix)
Configure Samsung Android 8 with Knox to enforce Account Blacklisting. On the MDM console, add all email domains not approved by DoD to the "Account blacklist" setting in the "Android Accounts" rule or blacklist all accounts by using the wildcard string ".*" The wildcard string will blacklist all email accounts except for those on the whitelist.