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

MediumLevel 2Automatedchrome

Description

This setting controls whether Google Chrome can use screen-share APIs including web-based online meetings, video, or screen sharing. Rationale: Allowing screen-share APIs within Google Chrome could potentially allow for sensitive data to be shared via screen captures. 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:ScreenCaptureAllowed (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

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome' -Name 'ScreenCaptureAllowed' -ErrorAction SilentlyContinue).'ScreenCaptureAllowed'; if ($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 'ScreenCaptureAllowed' -Value 0 -PropertyType DWord -Force | Out-Null

Properties

Operating systems: Any
Tags: chromebrowsercis-l2
Reference: CIS Google Chrome Benchmark v3.0.0 - 4.1.1 Ensure 'Allow or deny screen 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