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Re: Nmap issues...? or router?
From: William McVey <wam () cisco com>
Date: Thu, 11 Oct 2001 20:38:42 -0400

Ben Tetu-Pappas wrote:
This is a known cisco bug. Their documentation on the bug says something
like 'port scanning tools can create a situation where the router CPU
utilization goes to 100%'. I don't recall if there is an IOS upgrade to fix
this, so call Cisco and ask or go look through their online documentation to
see if you IOS is possibly affected.

Please note that I'm replying as a pen-tester who uses nmap and
not as Cisco spokesman.  I believe the Cisco bug mentioned is
the one documented in an advisory released this past May titled
"IOS Reload after Scanning Vulnerability."  The bug affects
devices running IOS version 12.1(1.3)T through IOS releases
12.1(2)T and 12.1(3)T.  The complete advisory can be found at

I hope this helps.

 -- William

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