The xnu kernel of Mac OS X contains a vulnerability in the code that handles TIOCSETD ioctl requests. Exploitation of this vulnerability can lead to denial of service and code execution.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60988/TKADV2007-001.txt
Source: https://packetstormsecurity.com/files/60988/TKADV2007-001.txt.html