SV-221579r769355: Online revocation checks must be performed. | Google Chrome Current Windows Security Technical Implementation Guide

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Assessment Title

Rule Text

Online revocation checks must be performed.

Description

Discussion Text

By setting this policy to true, the previous behavior is restored and online OCSP/CRL checks will be performed. If the policy is not set, or is set to false, then Chrome will not perform online revocation checks. Certificates are revoked when they have been compromised or are no longer valid, and this option protects users from submitting confidential data to a site that may be fraudulent or not secure.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000185SV-57623V-44789

References

DPMS Target Google Chrome Current Windows DISA DPMS Target Google Chrome Current Windows 4081

Checks

DISA STIG (Manual Reference)

Universal method:        
   1. In the omnibox (address bar) type chrome://policy        
   2. If EnableOnlineRevocationChecks is not displayed under the Policy Name column or it is not set to true under the Policy Value column, then this is a finding.

Windows method:
   1. Start regedit
   2. Navigate to HKLM\Software\Policies\Google\Chrome\
   3. If the EnableOnlineRevocationChecks value name does not exist or its value data is not set to 1, then this is a finding.

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.chrome:def:240037
# Online revocation checks must be performed.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Registry check
# 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\Google\Chrome').GetValueKind('EnableOnlineRevocationChecks').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Google\Chrome' -Name 'EnableOnlineRevocationChecks' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'EnableOnlineRevocationChecks') -eq '1'))
}

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 google_chrome_windows target this check assesses.

# OVAL Definition: oval:mil.disa.stig.chrome:def:240037
$regPath = "HKLM:\Software\Policies\Google\Chrome"
$regKey = "EnableOnlineRevocationChecks"
if (Test-Path $regPath) {
    $regValue = Get-ItemProperty -Path $regPath -Name $regKey -ErrorAction SilentlyContinue
    if ($regValue -and $regValue.$regKey -eq 1) {
        Write-Output "PASS"
        Exit 0
    }
}
Write-Output "FAIL"
Exit 1

Remediation

Windows group policy:
 1. Open the group policy editor tool with gpedit.msc 
 2. Navigate to Policy Path: Computer Configuration\Administrative Templates\Google\Google Chrome\
 Policy Name: Enable online OCSP/CRL checks
 Policy State: Enabled
 Policy Value: N/A