Buffer overflow in url.c in MPlayer 1.0rc2 and SVN before r25823 allows remote attackers to execute arbitrary code via a crafted URL that prevents the IPv6 parsing code from setting a pointer to NULL, which causes the buffer to be reused by the unescape code.
http://www.securityfocus.com/bid/27766
http://www.mplayerhq.hu/design7/news.html
http://www.mandriva.com/security/advisories?name=MDVSA-2008:045
http://www.debian.org/security/2008/dsa-1496
http://security.gentoo.org/glsa/glsa-200803-16.xml
http://secunia.com/advisories/29307