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Malformed Packet Causes Cisco Router DoS

Posted by CmdrTaco on from the oops-they-did-it-again dept.

MoreBeer writes "Patch 'em if you've got 'em... Cisco Security Advisory: Cisco IOS Malformed OSPF Packet Causes Reload states that a malformed OSPF packet can cause a router 'reload' (reboot). Vulnerable IOS versions include 12.0S, 12.2, and 12.3 ... If you're not screening OSPF at your perimeter and using OSPF Authentication, now would be a GREAT time to start."

2 of 124 comments (clear)

  1. I admit by tomee · · Score: 5, Informative

    I had to look it up. OSPF

  2. Only IOS devices RUNNING OSPF are vulnerable by w1r3sp33d · · Score: 5, Informative
    That rules out most routers, and most switches. If you have followed best practices in your deployment, no internet edge device should be running OSPF so that shouldn't be a consideration, basically it should boil down to who within the company is trying to crash your routers?

    What a great time to post a link to www.routergod.com! Here are the two parts of Seven of Nine's lecture on OSPF:

    http://www.routergod.com/sevenofnine/

    http://www.routergod.com/sevenofnine/ospf_part_2.h tml