[Dshield] Wireless MAC Authentication options.
AWilly at eSMIL.net
Mon Jun 20 16:28:29 GMT 2005
Forgive the dumb question (someone has to ask one), but, is the MAC address
not encrypted, or does encrypted traffic begin post MAC authentication?
We're implementing small scale wireless in a few of our offices and I'm
interested in how security is circumvented -- several of our offices are in
shared buildings. We're using MAC auth and keys, however the MAC auth was
the measure I had the most confidence in.
Can you elaborate (more) on how the MAC spoofing takes place?
(sorry for rider text)
From: Josh Tolley [mailto:josh at raintreeinc.com]
Sent: Monday, June 20, 2005 9:11 AM
To: General DShield Discussion List
Subject: Re: [Dshield] Wireless MAC Authentication options.
David Cary Hart wrote:
> I'm not so sure. MAC authentication is based upon the MAC of the client
> card which isn't broadcast (to the best of my knowledge) in any fashion.
> Why would a MAC id be subject to compromise?
The MAC address is transmitted -- it has to be. Otherwise it couldn't
serve its purpose, namely to identify the sending and receiving
stations. It's not sent out with "anyone listening" as its intended
recipient, but anyone with their antenna on can receive the transmission
and find the MAC address in the frame. From there, it's trivial with the
right hardware and software to change your own MAC address to one that
you've seen transmit successfully in the past.
Raintree Systems, Inc.
Office Phone: (801) 293-3090
Corporate Office: (760) 509-9000
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