Multiple integer overflows in the in_avi.dll plugin in Winamp before 5.623 allow remote attackers to execute arbitrary code via an AVI file with a crafted value for (1) the number of streams or (2) the size of the RIFF INFO chunk, leading to a heap-based buffer overflow.
http://forums.winamp.com/showthread.php?t=332010
http://secunia.com/advisories/46882
http://secunia.com/secunia_research/2011-81/
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A14981