It seems that Apple Mac OSX is the new playground. After the shakedown on Mac OSX trojan and vulnerability that allows remote code execution, a new PoC (proof of concept) was released on Apple Mac OS X “/usr/bin/passwd” vulnerability which can escalate local privilege of a user in a machine.
Update(JJ, 02 March 2006 23:56:42)
This has been patched in the latest update, 2006-01.