TMA-WIN10-2.2.32
Ensure 'Modify firmware environment values' is set to 'Administrators'
Description
This policy setting allows users to configure the system-wide environment variables that affect hardware configuration. This information is typically stored in the Last Known Good Configuration. Modification of these values and could lead to a hardware failure that would result in a denial of service condition. The recommended state for this setting is: Administrators. Note: This user right is considered a "sensitive privilege" for the purposes of auditing.
How it is checked
Audit method: Shell command
$f = Join-Path $env:TEMP ('tmaegis-' + [guid]::NewGuid().ToString() + '.inf'); secedit /export /cfg $f /areas SECURITYPOLICY USER_RIGHTS /quiet | Out-Null; $c = Get-Content $f -ErrorAction SilentlyContinue; Remove-Item $f -Force -ErrorAction SilentlyContinue; $line = $c | Where-Object { $_ -match '^\s*SeSystemEnvironmentPrivilege\s*=' } | Select-Object -First 1; $v = if ($line) { ($line -split '=', 2)[1].Trim().Trim('"') } else { $null }; $have = @(if ($v) { $v -split ',' | ForEach-Object { $_.Trim().TrimStart('*') } | Where-Object { $_ } }); if ((($have | Sort-Object -Unique) -join ',') -eq 'S-1-5-32-544') { 'compliant' } else { 'non-compliant: ' + ($have -join ',') }- Expected output
compliant
How it is fixed
Fix method: Guidance or infrastructure patch
Set through Group Policy (domain policy for domain members): Computer Configuration\Policies\Windows Settings\Security Settings\Local Policies\User Rights Assignment\Modify firmware environment values
Properties
- Operating systems
- windows-10
- Tags
- cis-convertedseceditwindows
- Reference
- CIS Microsoft Windows 10 Enterprise Benchmark v4.0.0 - 2.2.32
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target windows