Services using Local System that use negotiate when reverting to NTLM authentication will use the computer identity vs. authenticating anonymously.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-21951	3.151	SV-32445r1_rule	ECSC-1	Medium

Description
This setting ensures that services using Local System that use negotiate when reverting to NTLM authentication will use the computer identity vs. authenticating anonymously.

STIG	Date
Windows Server 2008 R2 Domain Controller Security Technical Implementation Guide	2012-09-05

Details

Check Text ( C-32911r1_chk )
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 “Network Security: Allow Local System to use computer identity for NTLM” is not set to “Enabled”, then this is a finding. The policy referenced configures the following registry value: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \System\CurrentControlSet\Control\LSA\ Value Name: UseMachineId Type: REG_DWORD Value: 1

Check Text ( C-32911r1_chk )

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 “Network Security: Allow Local System to use computer identity for NTLM” is not set to “Enabled”, then this is a finding.

The policy referenced configures the following registry value:

Registry Hive: HKEY_LOCAL_MACHINE
Subkey: \System\CurrentControlSet\Control\LSA\

Value Name: UseMachineId

Type: REG_DWORD
Value: 1

Fix Text (F-28856r1_fix)
Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Network Security: Allow Local System to use computer identity for NTLM” to “Enabled”.