It is possible to cause a DoS condition by causing the server to crash in alien-arena 7.33 by supplying various invalid parameters to the download command.

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.

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.

The Com_sprintf function in q_shared.c in Alien Arena 2006 Gold Edition 5.00 does not properly NULL terminate certain long strings, which allows remote attackers (possibly authenticated) to cause a denial of service (application crash) via a long skin, weapon, or model name.

Stack-based buffer overflow in the Cmd_Say_f function in g_cmds.c in Alien Arena 2006 Gold Edition 5.00 allows remote attackers (possibly authenticated) to execute arbitrary code by sending a long message to the server.

Format string vulnerability in the safe_cprintf function in acebot_cmds.c in Alien Arena 2006 Gold Edition 5.00 allows remote attackers (possibly authenticated) to execute arbitrary code via unspecified vectors when the server sends crafted messages to the clients.