TMA-FIREFOX-1.1.9.1

Ensure 'Lock Encrypted Media Extensions' is set to 'Enabled'

中レベル 1自動firefox

説明

This policy setting configures whether encrypted media extensions (EME) are downloaded automatically without user consent. EME is a JavaScript API for playing DRMed video content in HTML. The recommended state for this setting is: Enabled. Rationale: Downloading media from the internet without user consent could lead to malicious content being downloaded and deployed to the system. 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\Mozilla\Firefox\EncryptedMediaExtensions:Locked (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.

チェック方法

監査方法: Windows レジストリ

registry

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

期待される出力: compliant

修正方法

修正方法: シェルコマンド

shell

$p = 'Registry::HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox\EncryptedMediaExtensions'; if (-not (Test-Path -Path $p)) { New-Item -Path $p -Force | Out-Null }; New-ItemProperty -Path $p -Name 'Locked' -Value 1 -PropertyType DWord -Force | Out-Null

プロパティ

オペレーティングシステム: すべて
タグ: firefoxbrowsercis-l1
参照: CIS Mozilla Firefox ESR GPO Benchmark v1.0.0 - 1.1.9.1 Ensure 'Lock Encrypted Media Extensions' is set to 'Enabled'

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target firefox