Penetration Testing mailing list archives

Re: Cracking WEP and WPA keys


From: "David M. Zendzian" <dmz () dmzs com>
Date: Wed, 14 Dec 2005 11:39:02 -0800

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If I remember right, and this might be one to take to the wifi list, but 
the key is used to secure a key exchange, so you'd need to have the key 
to establish the trust.

google wpa key exchange to find more

dmz

pagvac wrote:

Would the following attack be feasible for obtaining a WEP key?

Set up an AP with VERY strong signal and same SSID as the one used by
the target network. After that, the client should be able to attempt
to connect to your AP (you send stronger signal than the legitimate
one) and send you the WEP which you could sniff from the AP itself.

After that you're done and the key is yours.

Am I talking non-sense here? Wouldn't the WEP key be sent to the AP in
the *clear* at the beginning of the handshake? Otherwise how can the
AP check whether or not the client is using the right key?

I've never tested this and my assumptions might be based on incomplete
and inaccurate knowledge about how wi-fi technologies.

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Audit your website security with Acunetix Web Vulnerability Scanner: 

Hackers are concentrating their efforts on attacking applications on your 
website. Up to 75% of cyber attacks are launched on shopping carts, forms, 
login pages, dynamic content etc. Firewalls, SSL and locked-down servers are 
futile against web application hacking. Check your website for vulnerabilities 
to SQL injection, Cross site scripting and other web attacks before hackers do! 
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