AOL Instant Messenger (AIM) 4.7.2480 and earlier allows remote attackers to cause a denial of service (application crash) via an instant message that contains a large amount of "<!--" HTML comments.

The AIM component of Trillian 0.73 and 0.74 allows remote attackers to cause a denial of service (crash) via certain strings such as "P > O < C".

Multiple buffer overflows in the IRC component of Trillian 0.73 and 0.74 allows remote malicious IRC servers to cause a denial of service and possibly execute arbitrary code via (1) a large response from the server, (2) a JOIN with a long channel name, (3) a long "raw 221" message, (4) a PRIVMSG with a long nickname, or (5) a long response from an IDENT server.

The IRC component of Trillian 0.73 and 0.74 allows remote malicious IRC servers to cause a denial of service (crash) by sending the raw messages (1) 206, (2) 211, (3) 213, (4) 214, (5) 215, (6) 217, (7) 218, (8) 243, (9) 302, (10) 317, (11) 324, (12) 332, (13) 333, (14) 352, and (15) 367.

The IRC component of Trillian 0.73 and 0.74 allows remote malicious IRC servers to cause a denial of service (crash) via a PART message with (1) a missing channel or (2) a channel that the Trillian user is not in.

Format string vulnerability in the error handling of IRC invite responses for Trillian 0.725 and 0.73 allows remote IRC servers to execute arbitrary code via an invite to a channel with format string specifiers in the name.

Buffer overflow in Trillian 0.73 allows remote IRC servers to execute arbitrary code via a long PING response.

Cerulean Studios Trillian 0.73 and earlier use weak encrypttion (XOR) for storing user passwords in .ini files in the Trillian directory, which allows local users to gain access to other user accounts.

Buffer overflow in the IRC module of Trillian 0.725 and 0.73 allowing remote attackers to execute arbitrary code via a long DCC Chat message.

Buffer overflow in the XML parser of Trillian 0.6351, 0.725 and 0.73 allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a skin with a long colors file name in trillian.xml.

Buffer overflow in the IDENT daemon (identd) in Trillian 0.6351, 0.725, 0.73, 0.74 and 1.0 pro allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a long request.

Trillian 1.0 Pro and 0.74 Freeware allows remote attackers to cause a denial of service (crash) via a TypingUser message in which the "TypingUser" string has been modified.

Buffer overflow in the MSN module in Trillian 0.74i allows remote MSN servers to execute arbitrary code via a long string that ends in a newline character.

Integer overflow in Trillian 0.74 and earlier, and Trillian Pro 2.01 and earlier, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a directIM packet that triggers a heap-based buffer overflow.

Stack-based buffer overflow in Trillian 0.71 through 0.74f and Trillian Pro 1.0 through 2.01 allows remote attackers to execute arbitrary code via a Yahoo Messenger packet with a long key name.

Buffer overflow in Trillian 3.0 and Pro 3.0 allows remote attackers to execute arbitrary code via a crafted PNG image file.

Multiple buffer overflows in the (1) AIM, (2) MSN, (3) RSS, and other plug-ins for Trillian 2.0 allow remote web servers to cause a denial of service (application crash) via a long string in an HTTP 1.1 response header.

Multiple buffer overflows in the Yahoo plug-in for Trillian 2.0, 3.0, and 3.1 allow remote web servers to cause a denial of service (application crash) via a long string in an HTTP 1.1 response header.

Trillian Pro 3.1 build 121, when checking Yahoo e-mail, stores the password in plaintext in a world readable file and does not delete the file after login, which allows local users to obtain sensitive information.

Cerulean Studios Trillian 3.0 allows remote attackers to cause a denial of service (crash) via a reverse direct connection from a different client, as demonstrated using LICQ.

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.

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.

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.