Mandriva Linux Security Advisory – KsIRC 1.3.12 allows remote attackers to cause a denial of service (crash) via a long PRIVMSG string when connecting to an Internet Relay Chat (IRC) server, which causes an assertion failure and results in a NULL pointer dereference.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/53599/MDKSA-2007-009.txt
Source: https://packetstormsecurity.com/files/53599/Mandriva-Linux-Security-Advisory-2007.009.html