Details

The ability to log in to another user’s active or locked session _MUST_ be disabled.

macOS has a privilege that can be granted to any user that will allow that user to unlock active user’s sessions. Disabling the admins and/or user’s ability to log into another user’s active andlocked session prevents unauthorized persons from viewing potentially sensitive and/or personal information.

Solution

Run the following bash code

/usr/bin/security authorizationdb write system.login.screensaver "use-login-window-ui"
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Supportive Information

The following resource is also helpful.

• https://github.com/usnistgov/macos_security

This security hardening control applies to the following category of controls within NIST 800-53: Access Control, Identification and Authentication.This control applies to the following type of system Unix.

References

• 800-53|AC-6
• 800-53|AC-6(1)
• 800-53|AC-6(2)
• 800-53|IA-2
• 800-53|IA-2(5)
• CCE|CCE-85395-2

Source

• Tenable.com/audits