SV-220847r991589: Windows 10 must be configured to require a minimum pin length of six characters or greater. | Microsoft Windows 10 STIG SCAP Benchmark

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Assessment Title

Rule Text

Windows 10 must be configured to require a minimum pin length of six characters or greater.

Description

Discussion Text

Windows allows the use of PINs as well as biometrics for authentication without sending a password to a network or website where it could be compromised. Longer minimum PIN lengths increase the available combinations an attacker would have to attempt. Shorter minimum length significantly reduces the strength.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366SV-78211V-63721

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:220847
# Windows 10 must be configured to require a minimum pin length of six characters or greater.
# 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\PassportForWork\PINComplexity').GetValueKind('MinimumPINLength').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\PassportForWork\PINComplexity' -Name 'MinimumPINLength' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'MinimumPINLength') -ge 6))
}

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:220847
$compliant = $true
if (Test-Path -Path "HKLM:\SOFTWARE\Policies\Microsoft\PassportForWork\PINComplexity") { $compliant = ($compliant -and ((Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\PassportForWork\PINComplexity" -Name MinimumPINLength -ErrorAction SilentlyContinue).MinimumPINLength -ge 6)) }
if (Test-Path -Path "HKLM:\SOFTWARE\Policies\Microsoft\WindowsHelloForBusiness\PINComplexity") { $compliant = ($compliant -and ((Get-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\WindowsHelloForBusiness\PINComplexity" -Name MinimumPINLength -ErrorAction SilentlyContinue).MinimumPINLength -ge 6)) }
if ($compliant) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> PIN Complexity >> "Minimum PIN length" to "6" or greater. 

v1607 LTSB:
The policy path is Computer Configuration >> Administrative Templates >> Windows Components >> Windows Hello for Business >> Pin Complexity.

v1507 LTSB:
The policy path is Computer Configuration >> Administrative Templates >> Windows Components >> Microsoft Passport for Work >> Pin Complexity.