So you thought your Mac was Safe?
 

OS X Zero-Day Exploit Threatens Massive Mac Attack | Malware | TechNewsWorld

Malware gets root access through the sudo users file
Many LINUX distros use the UNIX sudo users file too i.e. #sudo -i

Seems to be just the malware using an Apple added feature to OS X

OS X 10.10 DYLD_PRINT_TO_FILE Local Privilege Escalation Vulnerability

GNU/LINUX open source :thumbsup

When I worked for Apple, I used to hack other workers' computers and remotely turn up the volume to max then have Appletalk say weird things and scare them.. :p
sudo chmod 775 / was one of the commands that I used, but that was 9 years ago and I forget the rest..