Cerulean Trillian 3.1.0.120 allows remote attackers to cause a denial of service (client crash) via an AIM message containing the Mac encoded Rich Text Format (RTF) escape sequences (1) \'d1, (2) \'d2, (3) \'d3, (4) \'d4, and (5) \'d5. NOTE: the provenance of this information is unknown; the details are obtained solely from third party information.

Heap-based buffer overflow in the XML parser in the AIM plugin in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary code via a malformed XML tag.

Double free vulnerability in the XML parser in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary code via a crafted XML expression, related to the "IMG SRC ID."

Stack-based buffer overflow in AIM.DLL in Cerulean Studios Trillian before 3.1.10.0 allows user-assisted remote attackers to execute arbitrary code via a long attribute value in a FONT tag in a message.

Buffer overflow in the Display Names message feature in Cerulean Studios Trillian Basic and Pro 3.1.9.0 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a long nickname in an MSN protocol message.

Trillian 5.1.0.19 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate, a different vulnerability than CVE-2009-4831.