SV-278174r1268238: The Windows Server 2025 "Deny log on through Remote Desktop Services" user right on domain controllers must be configured to prevent unauthenticated access. | Microsoft Windows Server 2025 STIG SCAP Benchmark

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Assessment Title

Rule Text

The Windows Server 2025 "Deny log on through Remote Desktop Services" user right on domain controllers must be configured to prevent unauthenticated access.

Description

Discussion Text

Inappropriately granting user rights provides system, administrative, and other high-level capabilities. The "Deny log on through Remote Desktop Services" user right defines the accounts that are prevented from logging on using Remote Desktop Services. The Guests group must be assigned this right to prevent unauthenticated access.

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

IA Controls

NIST SP 800-53

Not mappedCCI-002314

References

DPMS Target Microsoft Windows Server 2025 DISA DPMS Target Microsoft Windows Server 2025 5719

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.stig.windows2025:def:278174
# The Windows Server 2025 "Deny log on through Remote Desktop Services" user right on domain controllers must be configured to prevent unauthenticated access.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Deny log on through Remote Desktop Services - Guests
# userright_object (userright_test)
function test_1 {
  return (($__tmp = "$env:TEMP\scc_userrights_$([guid]::NewGuid().Guid).cfg"; secedit /export /cfg $__tmp /areas USER_RIGHTS /quiet | Out-Null; $__m = Select-String -Path $__tmp -Pattern '^SeDenyRemoteInteractiveLogonRight\s*=\s*(.*)$'; Remove-Item $__tmp -ErrorAction SilentlyContinue; if ($__m -and $__m.Matches[0].Groups[1].Value.Trim().Length -gt 0) { (($__m.Matches[0].Groups[1].Value -split ',') | ForEach-Object { $__sid = $_.Trim().TrimStart('*'); try { (New-Object System.Security.Principal.SecurityIdentifier($__sid)).Translate([System.Security.Principal.NTAccount]).Value -replace '^[^\\]*\\', '' } catch { $__sid } }) -join ',' } else { '' }) -eq 'Guests')
}

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 ms_windows_server_2025 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows2025:def:278174
if (!(Get-LocalGroupPolicy -ErrorAction SilentlyContinue).UserRightsAssignments.DenyLogonThroughRDP -contains 'Guests') { Write-Output "FAIL"; exit 1 } else { Write-Output "PASS"; exit 0 }

function Get-LocalGroupPolicy {
    param([switch]$ErrorAction)
    try {
        $userRights = (Get-ItemProperty -Path 'HKLM:\System\CurrentControlSet\Control\Lsa\' -Name 'RemoteDesktopUsers' -ErrorAction SilentlyContinue).RemoteDesktopUsers.Split(',')
        if ($userRights -and $userRights -notcontains 'Guests') { return $null }
        return @{UserRightsAssignments = @{DenyLogonThroughRDP = 'Guests'}}
    } catch {
        if ($ErrorAction -eq 'SilentlyContinue') { return $null }
        throw
    }
}

Remediation

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> Deny log on through Remote Desktop Services to include the following:
- Guests Group.