Ensure 'Encryption Oracle Remediation' is set to 'Enabled: Force Updated Clients'

높음레벨 1자동windows

설명

Some versions of the CredSSP protocol that is used by some applications (such as Remote Desktop Connection) are vulnerable to an encryption oracle attack against the client. This policy controls compatibility with vulnerable clients and servers and allows you to set the level of protection desired for the encryption oracle vulnerability. The recommended state for this setting is: Enabled: Force Updated Clients.

점검 방법

감사 방식: Windows 레지스트리

registry

$bad = @(); $v = (Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters' -Name 'AllowEncryptionOracle' -ErrorAction SilentlyContinue).'AllowEncryptionOracle'; if (-not ($null -ne $v -and @(0) -contains [int64]$v)) { $bad += 'AllowEncryptionOracle=' + $v }; if ($bad.Count -eq 0) { 'compliant' } else { 'non-compliant: ' + ($bad -join ', ') }

예상 출력: compliant

조치 방법

조치 방식: 셸 명령

shell

if (-not (Test-Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters')) { New-Item -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters' -Force | Out-Null }; New-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters' -Name 'AllowEncryptionOracle' -Value 0 -PropertyType DWord -Force | Out-Null

속성

운영 체제: windows-10
태그: cis-convertedregistrywindows
참고 자료: CIS Microsoft Windows 10 Enterprise Benchmark v4.0.0 - 18.9.4.1

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target windows