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.

Cerulean Studios Trillian 3.1 Basic does not check SSL certificates during MSN authentication, which allows remote attackers to obtain MSN credentials via a man-in-the-middle attack with a spoofed SSL certificate.

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."

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.

Stack-based buffer overflow in the image tooltip implementation in Trillian before 3.1.12.0 allows remote attackers to execute arbitrary code via a long image filename, related to "AIM IMG Tag Parsing."

Stack-based buffer overflow in Cerulean Studios Trillian before 3.1.10.0 allows remote attackers to execute arbitrary code via unspecified attributes in the X-MMS-IM-FORMAT header in an MSN 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.

The AOL Instant Messenger (AIM) protocol handler in Cerulean Studios Trillian allows remote attackers to create files with arbitrary contents via certain aim: URIs, as demonstrated by a URI that begins with the "aim: &c:\" substring and contains a full pathname in the ini field. NOTE: this can be leveraged for code execution by writing to a Startup folder.

Buffer overflow in the AOL Instant Messenger (AIM) protocol handler in AIM.DLL in Cerulean Studios Trillian allows remote attackers to execute arbitrary code via a malformed aim: URI, as demonstrated by a long URI beginning with the aim:///#1111111/ substring.

Heap-based buffer overflow in Cerulean Studios Trillian 3.x before 3.1.6.0 allows remote attackers to execute arbitrary code via a message sent through the MSN protocol, or possibly other protocols, with a crafted UTF-8 string, which triggers improper memory allocation for word wrapping when a window width is used as a buffer size, a different vulnerability than CVE-2007-2478.