SV-254369r958408: Windows Server 2022 Remote Desktop Services must be configured with the client connection encryption set to High Level. | Microsoft Windows Server 2022 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows Server 2022 Remote Desktop Services must be configured with the client connection encryption set to High Level.

Description

Discussion Text

Remote connections must be encrypted to prevent interception of data or sensitive information. Selecting "High Level" will ensure encryption of Remote Desktop Services sessions in both directions. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000250-GPOS-00093

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

IA Controls

NIST SP 800-53

Not mappedCCI-000068Not mappedCCI-001453

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:254369
# Windows Server 2022 Remote Desktop Services must be configured with the client connection encryption set to High Level.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'Set client connection encryption level' is set to 'Enabled' and 'High Level'
# 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 NT\Terminal Services').GetValueKind('MinEncryptionLevel').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows NT\Terminal Services' -Name 'MinEncryptionLevel' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'MinEncryptionLevel') -eq 3))
}

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:254369
if (Test-Path -Path "HKLM:\Software\Policies\Microsoft\Windows NT\Terminal Services\MinEncryptionLevel" -ErrorAction SilentlyContinue) { $encryptionLevel = Get-ItemProperty -Path "HKLM:\Software\Policies\Microsoft\Windows NT\Terminal Services\MinEncryptionLevel" }.If ($encryptionLevel -and $encryptionLevel.MinEncryptionLevel -eq 3) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security >> Set client connection encryption level to "Enabled" with "High Level" selected.