Trillian MSN Authentication SSL Certificate Validation Security Bypass Vulnerability

Bugtraq ID:	35509
Class:	Design Error
CVE:
Remote:	Yes
Local:	No
Published:	Jun 26 2009 12:00AM
Updated:	Jun 29 2009 04:29PM
Credit:	Gabriel Menezes Nunes
Vulnerable:	Cerulean Studios Trillian 3.1
Not Vulnerable:

Trillian MSN Authentication SSL Certificate Validation Security Bypass Vulnerability

Trillian is prone to a security-bypass vulnerability because the application fails to properly validate SSL certificates from a server.

Successfully exploiting this issue allows attackers to perform man-in-the-middle attacks or impersonate trusted servers, which will aid in further attacks.

Trillian 3.1 is vulnerable; other versions may also be affected.

Trillian MSN Authentication SSL Certificate Validation Security Bypass Vulnerability

An attacker can use readily available network utilities to exploit this issue.

Trillian MSN Authentication SSL Certificate Validation Security Bypass Vulnerability

Solution:
Currently we are not aware of any vendor-supplied patches. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Trillian MSN Authentication SSL Certificate Validation Security Bypass Vulnerability

References:

• Trillian Homepage (Cerulean Studios)
  
• Trillian SSL Certificate Vulnerability (Gabriel Menezes Nunes )