Multiple heap-based buffer overflows in the IRC component in Cerulean Studios Trillian Pro before 3.1.5.1 allow remote attackers to corrupt memory and possibly execute arbitrary code via (1) a URL with a long UTF-8 string, which triggers the overflow when the user highlights it, or (2) a font HTML tag with a face attribute containing a long UTF-8 string.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33986
https://exchange.xforce.ibmcloud.com/vulnerabilities/33985
http://www.vupen.com/english/advisories/2007/1596
http://www.securitytracker.com/id?1017982
http://www.securityfocus.com/bid/23730
http://secunia.com/advisories/25086
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=522