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Re: Should nmap cause a DoS on cisco routers?
From: "Dobbins, Roland" <rdobbins () arbor net>
Date: Thu, 1 Jul 2010 11:07:36 +0000


On Jul 1, 2010, at 5:23 PM, Thierry Zoller wrote:

If a device crashes when being scanned - it's a vulnerability.

It sounds to me as if what happened was that he ended up driving the CPUs of the devices in question to 100%, and they 
stopped handling control-plane traffic and fell over.  There are infrastructure self-protection best current practices 
(BCPs) which can be deployed to defend against infrastructure-targeted DoS.

I've only seen this happen a few hundred times or so, so I could be wrong, of course.

;>

As the original poster posited:

Is this a configuration error of the networking devices?

The answer is, almost assuredly, "Yes."

-----------------------------------------------------------------------
Roland Dobbins <rdobbins () arbor net> // <http://www.arbornetworks.com>

    Injustice is relatively easy to bear; what stings is justice.

                        -- H.L. Mencken



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