The ability to use corners to disable the screen saver must be disabled.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-51475	OSX8-00-01095	SV-65685r1_rule		Medium

Description
The ability to use corners to disable the screen saver must be disabled.

STIG	Date
Apple OS X 10.8 (Mountain Lion) Workstation STIG	2015-02-10

Details

Check Text ( C-53815r2_chk )
To check if any of the hot corners are configured to disable the screen saver run the following command for the logged in user: system_profiler SPConfigurationProfileDataType | grep wvous There should be 4 results (wvous-bl-corner, wvous-br-corner, wvous-tl-corner, wvous-tr-corner). If any of them are not defined to be "1", this is a finding.

Fix Text (F-56277r2_fix)
Open up System Preferences->Desktop&Screen Saver, and open Hot Corners. Make sure none of the corners are defined to "Disable Screen Saver". This can be enforced using a configuration profile or managed preferences.