The macOS system must disable FileVault automatic log on.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-259434	APPL-14-000033	SV-259434r940924_rule		Medium

Description
If FileVault is enabled, automatic log on must be disabled, so that both FileVault and login window authentication are required. The default behavior of macOS when FileVault is enabled is to automatically log on to the computer once successfully passing user's FileVault credentials. Note: DisableFDEAutoLogin does not have to be set on Apple Silicon-based macOS systems that are smartcard enforced, as smartcards are available at preboot.

Description

If FileVault is enabled, automatic log on must be disabled, so that both FileVault and login window authentication are required. The default behavior of macOS when FileVault is enabled is to automatically log on to the computer once successfully passing user's FileVault credentials. Note: DisableFDEAutoLogin does not have to be set on Apple Silicon-based macOS systems that are smartcard enforced, as smartcards are available at preboot.

STIG	Date
Apple macOS 14 (Sonoma) Security Technical Implementation Guide	2024-01-10

Details

Check Text ( C-63173r940922_chk )
Verify the macOS system is configured to disable filevault automatic login with the following command: /usr/bin/osascript -l JavaScript << EOS $.NSUserDefaults.alloc.initWithSuiteName('com.apple.loginwindow')\ .objectForKey('DisableFDEAutoLogin').js EOS If the result is not "true", this is a finding.

Fix Text (F-63081r940923_fix)
Configure the macOS system to disable filevault automatic login by installing the "com.apple.loginwindow" configuration profile. Note: To ensure continued access to the operating system, consult the supplemental guidance provided with the STIG before applying the configuration profile.