Title

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

Discussion

A default screen saver must be configured for all users, as the screen saver will act as a session timeout 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

Verify the macOS system is configured with a screen saver with the following command: /usr/sbin/system_profiler SPConfigurationProfileDataType | /usr/bin/grep "moduleName" moduleName = Ventura; If there is no result or the "moduleName" is undefined, this is a finding.

Fix Text

Configure the macOS system with a screen saver by installing the "Login Window Policy" configuration profile.

Additional Identifiers

Rule ID: SV-257147r905074_rule

Vulnerability ID: V-257147

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.