[98077] in North American Network Operators' Group
Re: iPhone and Network Disruptions ...
daemon@ATHENA.MIT.EDU (Mike Caudill)
Tue Jul 24 15:42:13 2007
Date: Tue, 24 Jul 2007 14:47:10 -0400
From: Mike Caudill <mcaudill@cisco.com>
To: "Prof. Robert Mathews (OSIA)" <mathews@hawaii.edu>
CC: North American Network Operators Group <Nanog@merit.edu>,
"psirt (mailer list)" <psirt@cisco.com>
In-Reply-To: <46A2AA9A.5080104@hawaii.edu>
Errors-To: owner-nanog@merit.edu
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Prof. Robert Mathews (OSIA) wrote:
>
> Fellow Nanogers:
>
> Reports have floated across my desk in the past week, which have
> suggested that iPhones owned by faculty, staff and students have
> been flooding university campus Wi-Fi networks in parts of the
> country. For example, see: *"Duke Wi-Fi Crippled by Apple iPhones"
> *at
> http://www.sci-tech-today.com/story.xhtml?story_id=10200AG9NMHU
> Since that story first aired, and by applying a patch that was
> subsequently provided by Cisco, Duke has now come to see the
> elimination of the problem, see: "*Duke Resolves iPhone, Wi-Fi
> Outage Problems"* at
> http://www.eweek.com/article2/0,1895,2161065,00.asp
>
> There are certain aspects of this story in which I have the most
> interest, and the following questions (if I may be permitted to
> list them) detail my concern - adequately. I wish to ask you: 1)
> is the iPhone an extra-ordinary device when comparing it with
> devices of a comparable nature, which also request ties to a Wi-Fi
> network, (there are many that use Wi-Fi enabled Smart-phones and
> PDAs on campuses -- so, why do 'they' not pose a similar problem)
> 2) is this problem a result of poor planning and services
> implementation at certain campuses, 3) is this story - a product of
> great exaggerations? 4) if there are technical issues indeed that
> permit iPhones in particular to DoS Wi-Fi nets, what can these
> storms be attributed to, and what can/should be done about it?
>
Hi Robert,
While I am not at liberty to discuss specifics of customer cases, I
think that you will find some of the answers to your questions in a
Cisco Security Advisory which was released today:
http://www.cisco.com/warp/public/707/cisco-sa-20070724-arp.shtml
- -Mike-
> If you are in a position to respond, I would like to hear from you,
> either publicly or privately. If there is enough group interest
> in the matter, I would be most happy to summarize.
>
> All the best, Robert. --
- --
Mike Caudill <mcaudill@cisco.com>
PSIRT Incident Manager
DSS PGP: 0xEBBD5271
+1.919.392.2855 / +1.919.522.4931 (cell)
http://www.cisco.com/go/psirt
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