EFnet Paralyzed By Vulnerability
An anonymous reader writes "EFnet member Fionn 'Fudge' Kelleher reported several vulnerabilities in the IRC daemons charybdis, ircd-ratbox, and other derivative IRCds. The vulnerability was subsequently used to bring down large portions of the EFnet IRC network."
By crafting a particular message, you can cause the IRC daemon to call strlen(NULL) and game over, core dumped.
This is the problem you get when your strings don't know their allocated size like in that ghastly language Pascal.