Automatic logons must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-1145	WN08-SO-000036	SV-48044r1_rule	ECSC-1	Medium

Description
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.

STIG	Date
Windows 8 / 8.1 Security Technical Implementation Guide	2015-06-16

Details

Check Text ( C-44783r1_chk )
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.

Check Text ( C-44783r1_chk )

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 (F-41182r1_fix)
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

Fix Text (F-41182r1_fix)

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