2.3.2 Secure screen saver corners - top right corner

Information

Hot Corners can be configured to disable the screen saver by moving the mouse cursor to a corner of the screen.

Rationale:

Setting a hot corner to disable the screen saver poses a potential security risk since an unauthorized person could use this to bypass the login screen and gain access to the system.

Solution

Perform the following to disable a Hot Corner set to Disable Screen Saver:
Graphical Method:

Open System Preferences

Select Desktop & Screen Saver

Select Screen Saver

Select Hot Corners... and turn off any corner that is set to Disable Screen Saver

Terminal Method:
Run the following command to turn off Disable Screen Saver for a Hot Corner:

$ sudo -u <username> defaults write com.apple.dock <corner that is set to '6'> -int 0

example:

$ sudo -u seconduser defaults write com.apple.dock wvous-tl-corner -int 0

$ sudo -u seconduser defaults read com.apple.dock wvous-tl-corner

0

See Also

https://workbench.cisecurity.org/files/3013

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-11a.

Plugin: Unix

Control ID: 813c4cd19ce8fef3843ebe5889ae43ef756cfd51845dcdd0321ea89312ec45e1