Re: [OSPF] OSPF - Owning the Routing Table Attack

Michael Barnes <mjbarnes@cisco.com> Fri, 02 August 2013 19:05 UTC

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Date: Fri, 02 Aug 2013 12:05:33 -0700
From: Michael Barnes <mjbarnes@cisco.com>
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To: Uma Chunduri <uma.chunduri@ericsson.com>
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Cc: "ospf@ietf.org" <ospf@ietf.org>
Subject: Re: [OSPF] OSPF - Owning the Routing Table Attack
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On 08/02/2013 11:06 AM, Uma Chunduri wrote:
>>> What would be interesting to me, would be a way to attack OSPF when
>>> SHA-256 authentication is deployed, beyond the known replay attacks.
>
> Doesn't matter what auth algo is used for their work; if same key is used
> on all interfaces and it is compromised/got access some how (insider)
> - It's not hard to create the issues the posting documented.

If the key is compromised then what's the difference if no key is used? 
The reason I mentioned SHA-256 is that it is currently recommended 
algorithm to use. But you're right, it really doesn't matter what the 
algorithm is. I should have stated it differently.

Anyway, I think we agree that a new insider attack is not interesting 
because it's just one more of a known list.

-M