Felipe Andres Manzano discovered that mplayer, a multimedia player, is
vulnerable to several integer overflows in the Real video stream
demuxing code. These flaws could allow an attacker to cause a denial
of service (a crash) or potentially execution of arbitrary code by
supplying a maliciously crafted video file.
Read the full story: DSA-1644 mplayer – integer overflow: http://www.debian.org/security/2008/dsa-1644