Motonori Shindo mshindo at mshindo.net
Fri May 14 04:04:14 EDT 2004

From: Jouni Malinen <jkmaline at cc.hut.fi>
Subject: Re: PCF?
Date: Thu, 13 May 2004 09:03:15 -0700

> > http://www.auscert.org.au/
> Is there something new about this "new" attack? There are many ways to
> DoS 802.11 networks. 

Agreed. While I admit that bringing a microwave in the area where you
want to mount an attack is not so trivial(:-)), the method described
in AUSCERT page isn't really new and has little point to bring it up
now, I think.

> The auscert page or couple of other links from
> slashdot did not really give much details, but I would assume the attack
> was to reserve the channel by increasing NAV counters in the stations to
> prevent them from transmitting frames.

I don't know the detail of this reported attack, but if it is based on
NAV, I'm not certain why OFDM is immune to this attack.

BTW, generally speaking, is NAV controllable from the host? If it is
under the control of firmware, it is relatively hard to mount the
attack, isn't it?

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