SV-25274r2: Services using Local System that use Negotiate when reverting to NTLM authentication must use the computer identity vs. authenticating anonymously. | Windows 7 Security Technical Implementation Guide

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Assessment Title

Rule Text

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

Description

Discussion Text

Services using Local System that use Negotiate when reverting to NTLM authentication may gain unauthorized access if allowed to authenticate anonymously instead of using the computer identity.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000778CCE-9096-9

Additional Details

Responsibility

System Administrator

References

DPMS Target Windows 7 DISA DPMS Target Windows 7 1712

Checks

OVAL

oval:mil.disa.fso.windows:var:375000 ← xccdf_mil.disa.stig_value_Network_security_Allow_Local_System_to_use_computer_identity_for_NTLM_var

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

# Windows PowerShell
# Reconstructed from oval:mil.disa.fso.windows:def:3750
# Services using Local System that use Negotiate when reverting to NTLM authentication must use the computer identity vs. authenticating anonymously.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'Network Security: Allow Local System to use computer identity for NTLM' is set to 'Enabled'
# registry_object (registry_test)
function test_1 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa').GetValueKind('UseMachineId').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa' -Name 'UseMachineId' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'UseMachineId') -eq 1))
}

if (test_1) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual windows_7 target this check assesses.

# OVAL Definition: oval:mil.disa.fso.windows:def:3750
if((Test-Path -Path "HKLM:\System\CurrentControlSet\Control\Lsa\UseMachineId") -and ((Get-ItemProperty -Path "HKLM:\System\CurrentControlSet\Control\Lsa\UseMachineId").UseMachineId -eq 1)){Write-Output "PASS"; Exit 0}else{Write-Output "FAIL"; Exit 1}

Remediation

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".