V-259420

Discussion

A screen saver must be enabled and the system must be configured to require a password to unlock once the screensaver has been on for a maximum of five seconds. An unattended system with an excessive grace period is vulnerable to a malicious user.

Check Content

Verify the macOS system is configured to initiate a session lock within five seconds of the screen saver starting with the following command:

/usr/bin/osascript -l JavaScript << EOS
function run() {
  let delay = ObjC.unwrap($.NSUserDefaults.alloc.initWithSuiteName('com.apple.screensaver')\
.objectForKey('askForPasswordDelay'))
  if ( delay <= 5 ) {
    return("true")
  } else {
    return("false")
  }
}
EOS

If the result is not "true", this is a finding.