Stack-based buffer overflow in the cli_url_canon function in libclamav/phishcheck.c in ClamAV before 0.95.1 allows remote attackers to cause a denial of service (application crash) and possibly execute arbitrary code via a crafted URL.
https://wwws.clamav.net/bugzilla/show_bug.cgi?id=1553
http://www.vupen.com/english/advisories/2009/0985
http://www.securitytracker.com/id?1022028
http://www.securityfocus.com/bid/34446
http://www.mandriva.com/security/advisories?name=MDVSA-2009:097
http://svn.clamav.net/websvn/filedetails.php?repname=clamav-devel&path=%2Ftrunk%2FChangeLog&rev=5032
http://support.apple.com/kb/HT3865
http://secunia.com/advisories/36701
http://secunia.com/advisories/34612
http://lists.apple.com/archives/security-announce/2009/Sep/msg00004.html