Multiple security vulnerabilities on IRC handling lead to information leaks and buffer overflow. Buffer overflows on Rendezvous and XMPP protocols parsing.
CVE-2007-2479 (Cerulean Studios Trillian Pro before 22.214.171.124 allows remote attackers to obtain potentially sensitive information via long CTCP PING messages that contain UTF-8 characters, which generates a malformed response that is not truncated by a newline, which can cause portions of a server message to be sent to the attacker.)
CVE-2007-2478 (Multiple heap-based buffer overflows in the IRC component in Cerulean Studios Trillian Pro before 126.96.36.199 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.)
CVE-2007-2418 (Heap-based buffer overflow in the Rendezvous / Extensible Messaging and Presence Protocol (XMPP) component (plugins\rendezvous.dll) for Cerulean Studios Trillian Pro before 188.8.131.52 allows remote attackers to execute arbitrary code via a message that triggers the overflow from expansion that occurs during encoding.)