SV-253426r991580: Windows 11 Kernel (Direct Memory Access) DMA Protection must be enabled. | Microsoft Windows 11 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows 11 Kernel (Direct Memory Access) DMA Protection must be enabled.

Description

Discussion Text

Kernel DMA Protection to protect PCs against drive-by Direct Memory Access (DMA) attacks using PCI hot plug devices connected to Thunderbolt 3 ports. Drive-by DMA attacks can lead to disclosure of sensitive information residing on a PC, or even injection of malware that allows attackers to bypass the lock screen or control PCs remotely.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000172

References

DPMS Target Microsoft Windows 11 DISA DPMS Target Microsoft Windows 11 5471

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.windows11:def:253426
# Windows 11 Kernel (Direct Memory Access) DMA Protection must be enabled.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# 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\Kernel DMA Protection').GetValueKind('DeviceEnumerationPolicy').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\Kernel DMA Protection' -Name 'DeviceEnumerationPolicy' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'DeviceEnumerationPolicy') -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_11 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows11:def:253426
if (!(Test-Path -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\Kernel DMA Protection\DeviceEnumerationPolicy")) {exit 0} else {if ((Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\Kernel DMA Protection\DeviceEnumerationPolicy" -Name DeviceEnumerationPolicy -ErrorAction SilentlyContinue).DeviceEnumerationPolicy -eq 0) {exit 1} else {exit 0}}

Remediation

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Kernel DMA Protection >> "Enumeration policy for external devices incompatible with Kernel DMA Protection" to "Enabled" with "Enumeration Policy" set to "Block All".