Windows Server 2019 services using Local System that use Negotiate when reverting to NTLM authentication must use the computer identity instead of authenticating anonymously.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-205916 | WN19-SO-000260 | SV-205916r991589_rule | CCI-000366 | medium |
| Description | ||||
| Services using Local System that use Negotiate when reverting to NTLM authentication may gain unauthorized access if allowed to authenticate anonymously versus using the computer identity. | ||||
| STIG | Date | |||
| Microsoft Windows Server 2019 Security Technical Implementation Guide | 2025-05-23 | |||
Details
Check Text (C-205916r991589_chk)
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: \SYSTEM\CurrentControlSet\Control\LSA\
Value Name: UseMachineId
Type: REG_DWORD
Value: 0x00000001 (1)
Fix Text (F-6181r356111_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".