Title

Automatically signing in the last interactive user after a system-initiated restart must be disabled. (Cat II impact)

Discussion

Windows can be configured to automatically sign the user back in after a Windows Update restart. Some protections are in place to help ensure this is done in a secure fashion; however, disabling this will prevent the caching of credentials for this purpose and also ensure the user is aware of the restart.

Check Content

If the following registry value does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: DisableAutomaticRestartSignOn Value Type: REG_DWORD Value: 1

Fix Text

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Logon Options >> "Sign-in last interactive user automatically after a system-initiated restart" to "Disabled".

Additional Identifiers

Rule ID: SV-220859r877377_rule

Vulnerability ID: V-220859

Group Title: SRG-OS-000480-GPOS-00229

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.