TMA-CHROME-2.22

Ensure 'Enable TLS Encrypted ClientHello' Is Enabled

높음레벨 1자동chrome

설명

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.

점검 방법

감사 방식: Windows 레지스트리

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" }

예상 출력: compliant

조치 방법

조치 방식: 셸 명령

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

속성

운영 체제: 모두
태그: chromebrowsercis-l1
참고 자료: CIS Google Chrome Benchmark v3.0.0 - 2.22 Ensure 'Enable TLS Encrypted ClientHello' Is Enabled

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target chrome