Detections
Analytics
APPL-13-000032 - The macOS system must be configured with dedicated user accounts to decrypt the hard disk upon startup.
Information
When 'FileVault' and Multifactor Authentication are configured on the operating system, a dedicated user must be configured to ensure that the implemented Multifactor Authentication rules are enforced. If a dedicated user is not configured to decrypt the hard disk upon startup, the system will allow a user to bypass Multifactor Authentication rules during initial startup and first login.Solution
Configure the macOS system with a dedicated user account to decrypt the hard disk at startup and disable the logon ability of the newly created user account with the following commands:/usr/bin/sudo /usr/bin/fdesetup add -user <username>
/usr/bin/sudo /usr/bin/dscl . change /Users/<FileVault_User> UserShell </path/to/current/shell> /usr/bin/false
Remove all FileVault logon access from each user account defined on the system that is not a designated FileVault user:
/usr/bin/sudo /usr/bin/fdesetup remove -user <username>
See Also
https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_Apple_macOS_13_V1R5_STIG.zip
Item Details
Audit Name: DISA STIG Apple macOS 13 v1r5
Category: CONFIGURATION MANAGEMENT
References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-257160r991589_rule, STIG-ID|APPL-13-000032, Vuln-ID|V-257160
Plugin: Unix
Control ID: 071f64d343d983b9ed40f61e569d74178b41af20c052a5aef8c592a564a1555a