SV-226353r794633: The Fax service must be disabled if installed. | Microsoft Windows Server 2012/2012 R2 Domain Controller STIG SCAP Benchmark

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Assessment Title

Rule Text

The Fax service must be disabled if installed.

Description

Discussion Text

Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000381CCE-25383-1SV-52236V-26600

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)

Verify the Fax (fax) service is not installed or is disabled.

Run "Services.msc".

If the following is installed and not disabled, this is a finding:

Fax (fax)

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:4731
# The Fax service must be disabled if installed.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies the Fax service startup type is Disabled
# wmi_object (wmi_test)
function test_1 {
  return (((Get-CimInstance -Namespace 'root\cimv2' -Query 'SELECT startmode FROM Win32_Service WHERE name=''Fax''' | Select-Object -First 1) | Select-Object -ExpandProperty 'startmode') -eq 'Disabled')
}
# Verifies the Fax service is not installed
# wmi_object (wmi_test)
function test_2 {
  return (-not ($null -ne (Get-CimInstance -Namespace 'root\cimv2' -Query 'SELECT startmode FROM Win32_Service WHERE name='Fax'')))
}

if ((test_1 -or test_2)) {
  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:4731
$FaxService = Get-CimInstance -ClassName Win32_Service -Filter "Name='Fax'"
if ($FaxService -eq $null) { Write-Output "PASS"; exit 0 }
if ($FaxService.StartMode -eq 'Disabled') { Write-Output "PASS"; exit 0 }
Write-Output "FAIL"; exit 1

Remediation

Remove or disable the Fax (fax) service.