Format string vulnerability in the safe_bprintf function in acesrc/acebot_cmds.c in Alien Arena 2007 6.10 and earlier allows remote attackers to cause a denial of service (daemon crash) via format string specifiers in a nickname.

Alien Arena 2007 6.10 and earlier allows remote attackers to cause a denial of service (client disconnect) by sending a client_connect command in a forged packet from the server to a client. NOTE: client IP addresses are available via product-specific queries.