Title

The system is configured to allow the display of the last user name on the logon screen. (Cat III impact)

Discussion

The user name of the last user to log onto a system will not be displayed. This eliminates half of the Userid/Password equation that an unauthorized person would need to log on.

Check Content

Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. If the value for “Interactive logon: Do not display last user name” is not set to “Enabled”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \Software\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: DontDisplayLastUserName Value Type: REG_DWORD Value: 1

Fix Text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Interactive logon: Do not display last user name” to “Enabled”.

Additional Identifiers

Rule ID: SV-12304r1_rule

Vulnerability ID: V-11806

Group Title: Display of Last User Name

Expert Comments

CCIs tied to check.

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