Mandriva Linux Security Advisory 2009-133 – Off-by-one error in the event_wallops function in fe-common/irc/fe-events.c in irssi 0.8.13 allows remote IRC servers to cause a denial of service (crash) via an empty command, which triggers a one-byte buffer under-read and a one-byte buffer underflow. This update provides fixes for this vulnerability. Packages for 2008.0 are being provided due to extended support for Corporate products.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/83569/MDVSA-2009-133-1.txt
Source: https://packetstormsecurity.com/files/83569/Mandriva-Linux-Security-Advisory-2009-133.html