A vulnerability in the Cisco IOS (the OS that runs Cisco's family of routers and switches) has been reported by CERT. The attack results are nasty, send a sequence of IPv4 packets to any interface and force it to shut down, a/k/a cause a DoS (denial of service). Cisco has a patch available and a full advisory here: http://www.cisco.com/warp/public/707/cisco-sa-20030717-blocked.shtml.
Posted by Diana at July 18, 2003 06:54 AM