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os_screensaver_timeout_loginwindow_enforce Enforce Screen Saver Timeout at LoginWindow

NIST macOS Security Compliance Project Sequoia Guidance, Revision 4.0 (be5491f)
All changes in this version
first version loaded macOS

Title

Enforce Screen Saver Timeout at LoginWindow

Control

/usr/bin/osascript -l JavaScript << EOS
function run() {
let timeout = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\
.objectForKey('loginWindowIdleTime'))
if ( timeout <= $ODV ) {
return("true")
} else {
return("false")
}
}
EOS

Discussion

The screen saver timeout at LoginWindow _MUST_ be set to $ODV seconds or a shorter length of time.

This rule ensures that a full session lock is triggered within no more than $ODV seconds of inactivity.

Fix

This is implemented by a Configuration Profile.