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
