SV-220918r991589: The maximum age for machine account passwords must be configured to 30 days or less. | Microsoft Windows 10 STIG SCAP Benchmark

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Assessment Title

Rule Text

The maximum age for machine account passwords must be configured to 30 days or less.

Description

Discussion Text

Computer account passwords are changed automatically on a regular basis. This setting controls the maximum password age that a machine account may have. This setting must be set to no more than 30 days, ensuring the machine changes its password monthly.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366SV-78151V-63661

References

DPMS Target Microsoft Windows 10 DISA DPMS Target Microsoft Windows 10 4072

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.windows10:def:220918
# The maximum age for machine account passwords must be configured to 30 days or less.
# 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\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters').GetValueKind('MaximumPasswordAge').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters' -Name 'MaximumPasswordAge' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'MaximumPasswordAge') -gt 0)) -and (((@{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\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters').GetValueKind('MaximumPasswordAge').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters' -Name 'MaximumPasswordAge' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'MaximumPasswordAge') -le 30)))
}

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_10 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows10:def:220918
$regPath = "HKLM:\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters"
if (Test-Path $regPath) {
    $regValue = Get-ItemProperty -Path $regPath -Name MaximumPasswordAge -ErrorAction SilentlyContinue
    if ($regValue -and $regValue.MaximumPasswordAge -le 30 -and $regValue.MaximumPasswordAge -gt 0) {
        Write-Output "PASS"
        Exit 0
    }
}
Write-Output "FAIL"
Exit 1

Remediation

This is the default configuration for this setting (30 days).

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Maximum machine account password age" to "30" or less (excluding 0 which is unacceptable).