From Samsung Android OS 8 with Knox 3.x COBO Use Case Security Technical Implementation Guide
Part of PP-MDF-991000
Associated with: CCI-000366
Whitelisting of authorized email accounts (POP3, IMAP, EAS) prevents a user from configuring a personal email account that could be used to forward sensitive DoD data to unauthorized recipients.
Review Samsung Android 8 with Knox configuration settings to determine if the mobile device is enforcing Account Whitelisting. 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 whitelist" setting in the "Android Accounts" rule. 2. Verify the whitelist only contains DoD-approved email domains (for example, mail.mil). Note: Proper configuration of Account blacklist is required for this configuration to function correctly. 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 DoD-approved domain. 6. Verify the email account can be added. 7. Attempt to add an email account with a domain not approved by DoD. 8. Verify that the email account cannot be added. If the MDM console "Account whitelist" is not set to contain DoD-approved email domains, or on the Samsung Android 8 with Knox device, the user is able to successfully configure the email account with a domain not approved by DoD, or the user is not able to install the DoD-approved email account, this is a finding.
Configure Samsung Android 8 with Knox to enforce Account Whitelisting. On the MDM console, add all DoD-approved email domains to the "Account whitelist" setting in the "Android Accounts" rule. Note: Recommended to add .*@mail.mil.
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