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Re: [Karlnet] RE: [isp-wireless] Re: DSSS security hole anounced

To: Karlnet Mailing List <karlnet@WISPNotes.com>
Subject: Re: [Karlnet] RE: [isp-wireless] Re: DSSS security hole anounced
From: Chris Conn <cconn@abacom.com>
Reply-to: Karlnet Mailing List <karlnet@WISPNotes.com>
Date: Thu, 13 May 2004 13:55:16 -0400
List-post: <mailto:karlnet@WISPNotes.com>
Of course I still monitor the list, we still utilise Karlnet extensively!

Probably right Mr Metcalf that the PHY layer can be denied service using this method. That is assuming that the Turbocell protocol actually defers eternally, although I believe Karlnet has put a maximum radio deferral time way back in version 3.75 =) It may slow things down a bit perhaps. I don't really consider the Karlnet MAC to be very compliant with any real standard.

Chris


Support wrote:


Thanks for the reply Chris, nice to know you are still monitoring the list.
RLM

-----Original Message-----
From: karlnet-bounces@WISPNotes.com
[mailto:karlnet-bounces@WISPNotes.com]On Behalf Of Chris Conn
Sent: Thursday, May 13, 2004 1:35 PM
To: Karlnet Mailing List
Subject: Re: [Karlnet] RE: [isp-wireless] Re: DSSS security hole
anounced


This vulnerability requires the device to use Carrier Sense Multiple Access with Collision Avoidance, the key here being the Collision Avoidance. Karlnet does not use CA since it is based on a polling MAC and therefore does not utilize CSMA/CA.


So sleep easy, if actually you are to believe that someone would truly want to try this.


Dan Metcalf wrote:



I wonder if karlnet code could change the DSSS code



-----Original Message-----
From: Ivan Korshun [mailto:ivan@vector.kharkov.ua]
Sent: Thursday, May 13, 2004 2:14 PM
To: isp-wireless@isp-wireless.com
Subject: [isp-wireless] Re: DSSS security hole anounced

Barry,

It is known already more than 3 years ...
I have termed it a "sterilizer"

Solution of a problem "sterilizer":
- change one bit in firmware PC card (Prism 2.5 e.t.s.)
or
- possibility to change the code DSSS by the user,
the code DSSS could be changed in firmware till 1997

OFDM (802.11a/g) has much more problems than DSSS...

-Ivan



Hello WISP,

http://www.auscert.org.au/render.html?it=4091

Affects DSSS systems. Also on slashdot......

--
Best regards,
Barry                          mailto:isplists@whywait4wires.com

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