Watchguard SOHO firewall before 5.0.35 allows remote attackers to cause a denial of service (crash and reboot) when SOHO forwards a packet with bad IP options.
http://www.securityfocus.com/bid/4447
http://www.iss.net/security_center/static/8774.php
http://online.securityfocus.com/archive/1/266380
http://archives.neohapsis.com/archives/vulnwatch/2002-q2/0006.html