TMA-CHROME-2.11
Ensure 'Allow download restrictions' is set to 'Enabled: Block malicious downloads'
Description
Google Chrome can block certain types of downloads, and won't let users bypass the security warnings, depending on the classification of Safe Browsing. - No special restrictions. Default. (0, Disabled) (Default) - Block malicious downloads and dangerous file types. (1) - Block malicious downloads, uncommon or unwanted downloads and dangerous file types. (2) - Block all downloads. (3) - Block malicious downloads. Rationale: Users shall be prevented from downloading malicious file types, and shall not be able to bypass security warnings. 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:DownloadRestrictions (REG_DWORD); compliant when it is 4. Remediation writes 4 locally; in a domain set it through the ADMX so Group Policy does not revert it.
How it is checked
Audit method: Windows registry
$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome' -Name 'DownloadRestrictions' -ErrorAction SilentlyContinue).'DownloadRestrictions'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @(4) -contains [int64]$v)) { 'compliant' } else { "non-compliant: $v" }- Expected output
compliant
How it is fixed
Fix method: Shell command
$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 'DownloadRestrictions' -Value 4 -PropertyType DWord -Force | Out-NullProperties
- Operating systems
- Any
- Tags
- chromebrowsercis-l1
- Reference
- CIS Google Chrome Benchmark v3.0.0 - 2.11 Ensure 'Allow download restrictions' is set to 'Enabled: Block malicious downloads'
Check this host
Run this on a machine you are allowed to audit. The scan is read-only.
tmaegis scan --target chrome