MPlayer versions 0.90pre to 1.0pre1 are susceptible to a remotely exploitable buffer overflow vulnerability. A malicious host can craft a harmful ASX header, and trick MPlayer into executing arbitrary code upon parsing that header.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/31721/mplayer.txt
Source: https://packetstormsecurity.com/files/31721/mplayer.txt.html