Automatic logons must be disabled.

From Windows 8/8.1 Security Technical Implementation Guide

Part of Disable Automatic Logon

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-48044r1_rule Automatic logons must be disabled.

Vulnerability discussion

Allowing a system to automatically log on when the machine is booted could give access to any unauthorized individual who restarts the computer. Automatic logon with administrator privileges would give full access to an unauthorized individual.

Check content

Analyze the system using the Security Configuration and Analysis snap-in. (See "Performing Analysis with the Security Configuration and Analysis Snap-in" in the STIG Overview document.) Expand the Security Configuration and Analysis tree view. Navigate to Local Policies -> Security Options. (See "Updating the Windows Security Options File" in the STIG Overview document if MSS settings are not visible in the system's policy tools.) If the value for "MSS: (AutoAdminLogon) Enable Automatic Logon (not recommended)" is not set to "Disabled", this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Microsoft\Windows NT\CurrentVersion\Winlogon\ Value Name: AutoAdminLogon Type: REG_SZ Value: 0 Severity Override: If the "DefaultName" or "DefaultDomainName" in the same registry path contain an administrator account name and the "DefaultPassword" contains a value, this is a CAT I finding.

Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "MSS: (AutoAdminLogon) Enable Automatic Logon (not recommended)" to "Disabled". Ensure no passwords are stored in the "DefaultPassword" registry value noted below. Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Microsoft\Windows NT\CurrentVersion\Winlogon\ Value Name: DefaultPassword

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