Vulnerability Discussion

Although hot corners can be used to initiate a session lock or launch useful applications, they can also be configured to disable an automatic session lock from initiating. Such a configuration introduces the risk that a user might forget to manually lock the screen before stepping away from the computer.

Check

Verify the macOS system is configured to disable hot corners with the following command:

/usr/sbin/system_profiler SPConfigurationProfileDataType | /usr/bin/grep "wvous"

"wvous-bl-corner" = 0;
"wvous-br-corner" = 0;
"wvous-tl-corner" = 0;
"wvous-tr-corner" = 0;

If the command does not return the following, this is a finding.

"wvous-bl-corner = 0;
wvous-br-corner = 0;
wvous-tl-corner = 0;
wvous-tr-corner = 0;"

Fix

Configure the macOS system to disable hot corners by installing the "Custom Policy" configuration profile.