MPlayer is a media player incuding support for a wide range of audio and video formats.
Stefan Cornelius and Reimar Doffinger of Secunia Research discovered several boundary errors in the functions cddb_query_parse(), cddb_parse_matches_list() and cddb_read_parse(), each allowing for a stack-based buffer overflow.
A remote attacker could entice a user to open a specially crafted file with malicious CDDB entries, possibly resulting in the execution of arbitrary code with the privileges of the user running MPlayer.
There is no known workaround at this time.
All MPlayer users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=media-video/mplayer-1.0.20070622"