Hi all,
another security vulnerability in the Cisco routers running the ospf routing protocol using ios-12.0,12t.
This is due to a malformed packet.
Luckily Ospf isnt enabled by default but hey ......
Cisco has released software that works around this vuln.
Go to the Cisco site immediately to get an Update.

Just came across this Cisco Advisory on the CAT-oS IN CATALYST SWITCHES!
They are vulnerable to a Tcp-ack, DDOS.
Advisory paoted to this link below.
http://www.cisco.com/warp/public/707/cisco-sa-20040609-catos.shtml.
All these switches may be susceptible:
Catalyst 6000 series

Catalyst 5000 series

Catalyst 4500 series

Catalyst 4000 series

Catalyst 2948G, 2980G, 2980G-A, 4912G - use Catalyst 4000 series code base

Catalyst 2901, 2902, 2926[T,F,GS,GL], 2948
Like all router seurity practices say,turn off unnecessary services especially http,telnet,and upgrade to newer CAT-oS.
IOS -os is not affected !