Title

The macOS system must conceal, via the session lock, information previously visible on the display with a publicly viewable image. (Cat III impact)

Discussion

A default screen saver must be configured for all users, as the screen saver will act as a session time-out lock for the system and must conceal the contents of the screen from unauthorized users. The screen saver must not display any sensitive information or reveal the contents of the locked session screen. Publicly viewable images can include static or dynamic images such as patterns used with screen savers, photographic images, solid colors, a clock, a battery life indicator, or a blank screen.

Check Content

To view the currently selected screen saver for the logged-on user, run the following command: /usr/sbin/system_profiler SPConfigurationProfileDataType | /usr/bin/grep loginWindowModulePath If there is no result or defined "modulePath", this is a finding.

Fix Text

This setting is enforced using the "Login Window Policy" configuration profile.

Additional Identifiers

Rule ID: SV-252441r816137_rule

Vulnerability ID: V-252441

Group Title: SRG-OS-000031-GPOS-00012

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.