TMA-CHROME-2.22

Ensure 'Enable TLS Encrypted ClientHello' Is Enabled

TinggiLevel 1Otomatischrome

Deskripsi

This setting controls the defaults for using Encrypted ClientHello (ECH). ECH is an extension to TLS and encrypts the initial handshake with a website that can only be decrypted by that website. Google Chrome may, or may not, use ECH based on 3 factors: sever support, HTTPS DNS record availability, or rollout status. Rationale: Previously all handshakes were in the open and could expose sensitive information like the name of the website that you are connecting to. 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:EncryptedClientHelloEnabled (REG_DWORD); compliant when it is 1. Remediation writes 1 locally; in a domain set it through the ADMX so Group Policy does not revert it.

Cara pemeriksaan

Metode audit: Registry Windows

registry

$v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome' -Name 'EncryptedClientHelloEnabled' -ErrorAction SilentlyContinue).'EncryptedClientHelloEnabled'; if ($null -eq $v) { 'unset' } elseif (($null -ne $v -and @(1) -contains [int64]$v)) { 'compliant' } else { "non-compliant: $v" }

Output yang diharapkan: compliant

Cara perbaikan

Metode perbaikan: Perintah shell

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 'EncryptedClientHelloEnabled' -Value 1 -PropertyType DWord -Force | Out-Null

Properti

Sistem operasi: Apa saja
Tag: chromebrowsercis-l1
Referensi: CIS Google Chrome Benchmark v3.0.0 - 2.22 Ensure 'Enable TLS Encrypted ClientHello' Is Enabled

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shell

tmaegis scan --target chrome