SV-226149r852092: Optional component installation and component repair must be prevented from using Windows Update. | Microsoft Windows Server 2012/2012 R2 Domain Controller STIG SCAP Benchmark

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Assessment Title

Rule Text

Optional component installation and component repair must be prevented from using Windows Update.

Description

Discussion Text

Uncontrolled system updates can introduce issues to a system. Obtaining update components from an outside source may also potentially provide sensitive information outside of the enterprise. Optional component installation or repair must be obtained from an internal source.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001812CCE-23727-1SV-51606V-36677

References

DPMS Target Microsoft Windows Server 2012-2012 R2 DC DISA DPMS Target Microsoft Windows Server 2012-2012 R2 DC 4217

Checks

DISA STIG (Manual Reference)

If the following registry value does not exist or is not configured as specified, this is a finding:

Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \Software\Microsoft\Windows\CurrentVersion\Policies\Servicing\

Value Name: UseWindowsUpdate

Type: REG_DWORD
Value: 2

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.fso.windows:def:4444
# Optional component installation and component repair must be prevented from using Windows Update.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'Specify settings for optional component installation and component repair' is set to 'Enabled' with 'Never attempt to download payload from Windows Update' selected
# 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\Microsoft\Windows\CurrentVersion\Policies\Servicing').GetValueKind('UseWindowsUpdate').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Servicing' -Name 'UseWindowsUpdate' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'UseWindowsUpdate') -eq 2))
}

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_2012_and_2012_r2_dc target this check assesses.

# OVAL Definition: oval:mil.disa.fso.windows:def:4444
$regPath = "HKLM:\Software\Microsoft\Windows\CurrentVersion\Policies\Servicing"
$regName = "UseWindowsUpdate"
$expectedValue = 2
if (Test-Path $regPath -ErrorAction SilentlyContinue) {
    $regValue = (Get-ItemProperty -Path $regPath -Name $regName -ErrorAction SilentlyContinue).$regName
    if ($regValue -eq $expectedValue) { 
        Write-Output "PASS"; 
        exit 0
    }
}
Write-Output "FAIL"; 
exit 1

Remediation

Configure the policy value for Computer Configuration -> Administrative Templates -> System -> "Specify settings for optional component installation and component repair" to "Enabled" and with "Never attempt to download payload from Windows Update" selected.