Dan Metcalf wrote:
Chris,
I wasn't thinking about the DOS, but rather the ability of karlnet to
change the DSSS code to completely remove that possibility and maybe
prevent it from being sniffed using kismet
Dan
Hello,
Have you actually tried Kismet? It will show perhaps 5-10% tops of the
traffic (still enough for the patient people). Anyway, turn wep on and
you will get rid of the Kismet problem since it waits for weak
(unencrypted) WEP IVs, and it is my understanding that Karlnet does not
send the IVs in the clear. On top of that, if you are using an Orinoco
radio, it does not send weak IVs...
Chris
-----Original Message-----
From: karlnet-bounces@WISPNotes.com
[mailto:karlnet-bounces@WISPNotes.com] On
Behalf Of Chris Conn
Sent: Thursday, May 13, 2004 1:55 PM
To: Karlnet Mailing List
Subject: Re: [Karlnet] RE: [isp-wireless] Re: DSSS security hole
anounced
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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