SV-254379r958848: Windows Server 2022 Windows Remote Management (WinRM) client must not allow unencrypted traffic. | Microsoft Windows Server 2022 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows Server 2022 Windows Remote Management (WinRM) client must not allow unencrypted traffic.

Description

Discussion Text

Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this. Satisfies: SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174

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

IA Controls

NIST SP 800-53

Not mappedCCI-002890Not mappedCCI-003123

References

DPMS Target Microsoft Windows Server 2022 DISA DPMS Target Microsoft Windows Server 2022 5485

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.windows2022:def:254379
# Windows Server 2022 Windows Remote Management (WinRM) client must not allow unencrypted traffic.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'Allow unencrypted traffic' is set to 'Disabled'
# 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\Software\Policies\Microsoft\Windows\WinRM\Client').GetValueKind('AllowUnencryptedTraffic').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WinRM\Client' -Name 'AllowUnencryptedTraffic' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'AllowUnencryptedTraffic') -eq 0))
}

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_2022 target this check assesses.

# oval:mil.disa.stig.windows2022:def:254379
$compliant = (Get-ItemProperty -Path "HKLM:\Software\Policies\Microsoft\Windows\WinRM\Client" -Name "AllowUnencryptedTraffic" -ErrorAction SilentlyContinue).AllowUnencryptedTraffic -eq 0
if ($compliant) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Client >> Allow unencrypted traffic to "Disabled".