TMAegis
More rules for macos

macOS

TMA-MACOS14-2.6.6

Ensure FileVault Is Enabled

HighLevel 1Automatedmacos

Description

FileVault secures a system's data by automatically encrypting its boot volume and requiring a password or recovery key to access it. FileVault should be used with a saved escrow key to ensure that the owner can decrypt their data if the password is lost. FileVault may also be enabled using command line using the fdesetup command. To use this functionality, consult the Der Flounder blog for more details (see link below under References). Encrypting sensitive data minimizes the likelihood of unauthorized users gaining access to it.

How it is checked

Audit method: Shell command

shell
s=$(/usr/bin/fdesetup status 2>/dev/null) || exit 1
p=$(/usr/bin/osascript -l JavaScript <<'EOS'
$.NSUserDefaults.alloc.initWithSuiteName('com.apple.MCX').objectForKey('dontAllowFDEDisable').js
EOS
)
if printf '%s' "$s" | /usr/bin/grep -q "FileVault is On" && [ "$p" = true ]; then echo compliant; else echo "$s dontAllowFDEDisable=${p:-unset}"; fi
Expected output
compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Graphical Method: Perform the following steps to enable FileVault: 1. Open System Settings 2. Select Security & Privacy 3. Select Turn On... Note: This will allow you to create a recovery key for FileVault. Keep the key saved securely in case it is needed at a later date. Profile Method: Create or edit a configuration profile with the following information: 1. The PayloadType string is com.apple.MCX 2. The key to include is dontAllowFDEDisable 3. The key must be set to <true/> Note: This profile is required to pass the audit.

Properties

Operating systems
macos-14
Tags
macossonoma
Reference
CIS Apple macOS 14.0 Sonoma Benchmark v3.1.0 - 2.6.6 Ensure FileVault Is Enabled

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell
tmaegis scan --target macos