A set of recently discovered security holes in Mac and Linux platforms reminds those over-confident in their superior protection that no one is immune to vulnerabilities.
H Security reports on a series of actively exploited vulnerabilities in Apple's Mac OS X operating system that remain unpatched. A vulnerability in mounting malformed HFS disk images creates a privilege elevation risk, allowing regular users to obtain root privileges.
Other exploits involving kernel system vulnerabilities create a means for hackers to crash vulnerable systems. Lastly, another unpatched flaw in AppleTalk poses a system crash (though not code injection) risk.
http://www.linuxlinks.com/portal/news/article.php?story=20090416130449517