A number of vulnerabilities in GAIM found by Stefan Esser. Notified to vendor-sec on Jan16th and have been committed to CVS. Agreed to hold off on disclosure of the details until Stefan has sent his advisory. Due to the nature of instant messaging many of these bugs require man-in-the-middle attacks between client and server. However at least one of the buffer overflows could be exploited by an attacker sending a carefully constructed malicious message through a server. CAN-2004-0006 Buffer overflows in Gaim 0.75 and earlier including parsing cookies in a Yahoo web connection, YMSG protocol overflows parsing Yahoo Login Webpage, YMSG packet overflow, URL parser, and HTTP Proxy connect. CAN-2004-0007 Buffer overflow in Gaim 0.74 and earlier in the Extract Info Field Function used for MSN and YMSG protocol handlers. CAN-2004-0008 Integer Overflow in Gaim 0.74 and earlier, when allocating memory for a directIM packet results in heap overflow. Affects: 9
Removing embargo. Issue public 10am CET on Jan26 to full-disclosure list by Stefan
An errata has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on the solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHSA-2004-032.html