Q: Any Fix for Dark Jedi Firmware Vulnerability yet?

Apparently,. ,If you let your pre-2014 Macbook fall asleep, it becomes vulnerable to permanent firmware replacement via a drive-by attack from a malicious website that you may visit according to this article: http://www.macissues.com/2015/06/02/how-to-protect-your-mac-from-the-dark-jedi-f irmware-hack/.

Is there a fix for this and if not, when can we expect one?

Thanks