TMA-CHROME-4.4

Ensure 'Allow or deny audio capture' is set to 'Disabled'

MediumLevel 2Automatedchrome

Description

This setting allows administrators to set whether the end-user is prompted for access to audio capture devices. - Disabled (0): Turns off prompts and audio capture will only work for URLs configured in the AudioCaptureAllowedUrls list. - Enabled (1): With the exception of URLs set in the AudioCaptureAllowedUrls list, users get prompted for audio capture access. Rationale: The end-user having the ability to allow or deny audio capture for websites in Google Chrome could open an organization up to a malicious site that may capture proprietary information through the browser. Audit reads the Group Policy registry value and prints 'compliant', 'unset' (policy not configured, reported as FAIL) or the non-compliant value. Registry value: HKLM\SOFTWARE\Policies\Google\Chrome:AudioCaptureAllowed (REG_DWORD); compliant when it is 0. Remediation writes 0 locally; in a domain set it through the ADMX so Group Policy does not revert it.

How it is checked

Audit method: Windows registry

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome' -Name 'AudioCaptureAllowed' -ErrorAction SilentlyContinue).'AudioCaptureAllowed'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @(0) -contains [int64]$v)) { 'compliant' } else { "non-compliant: $v" }

Expected output: compliant

How it is fixed

Fix method: Shell command

shell

$p = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome'; if (-not (Test-Path -Path $p)) { New-Item -Path $p -Force | Out-Null }; New-ItemProperty -Path $p -Name 'AudioCaptureAllowed' -Value 0 -PropertyType DWord -Force | Out-Null

Properties

Operating systems: Any
Tags: chromebrowsercis-l2
Reference: CIS Google Chrome Benchmark v3.0.0 - 4.4 Ensure 'Allow or deny audio capture' is set to 'Disabled'

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target chrome --level 2