SV-221591r960963: WebUSB must be disabled. | Google Chrome Current Windows STIG SCAP Benchmark

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Assessment Title

Rule Text

WebUSB must be disabled.

Description

Discussion Text

Allows you to set whether websites are allowed to get access to connected USB devices. Access can be completely blocked, or the user can be asked every time a website wants to get access to connected USB devices. If this policy is left not set, ”3” will be used, and the user will be able to change it. 2 = Do not allow any site to request access to USB devices via the WebUSB API 3 = Allow sites to ask the user to grant access to a connected USB device

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

IA Controls

NIST SP 800-53

Not mappedCCI-000381SV-96301V-81587

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 "DefaultWebUsbGuardSetting" is not displayed under the "Policy Name" column or it is not set to "2", this is a finding.
Windows method:
 1. Start regedit
 2. Navigate to HKLM\Software\Policies\Google\Chrome\
 3. If the "DefaultWebUsbGuardSetting" value name does not exist or its value data is not set to "2", 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:670058
# WebUSB must be disabled.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# WebUSB must be disabled.
# 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('DefaultWebUsbGuardSetting').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Google\Chrome' -Name 'DefaultWebUsbGuardSetting' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'DefaultWebUsbGuardSetting') -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 google_chrome target this check assesses.

# OVAL Definition: oval:mil.disa.stig.chrome:def:670058
if (-not (Test-Path -Path "HKLM:\Software\Policies\Google\Chrome\DefaultWebUsbGuardSetting" -ErrorAction SilentlyContinue) -or (Get-ItemProperty -Path "HKLM:\Software\Policies\Google\Chrome\DefaultWebUsbGuardSetting" -Name "DefaultWebUsbGuardSetting" -ErrorAction SilentlyContinue).DefaultWebUsbGuardSetting -ne 2) { Write-Output "FAIL"; exit 1 } else { Write-Output "PASS"; exit 0 }

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\Content Settings
 Policy Name: Control use of the WebUSB API
 Policy State: Enabled
 Policy Value: 2