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Published: 2014-05-02
Last Updated: 2014-05-02 13:25:39 UTC
by Tom Webb (Version: 1)
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Tom Webb

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Exposing WPA2 Paper

Published: 2014-05-02
Last Updated: 2014-05-02 02:10:51 UTC
by Tom Webb (Version: 1)
2 comment(s)

A new paper(1) discussing vulnerabilities on WPA2-PSK was released recently and many people have been interested in it, but have not gained access. By using a library, yes they still exist and are still useful, I was able to get access to the paper.

WPA2-PSK has a key length between 8 to 63 ASCII characters. They collected WPA2 handshakes using Aireplay deauthentication attack. Their method uses pre generated dictionary of 666,696 entries and Aircrack to bruteforce the password in their test.  They wrote a program that would generate a dictionary of all possible 95 ASCII characters for the entire PSK key space. They also discuss ways to prevent this type of attack.  

While the methodology is sound and I applaud anyone that publishes papers, but didn‚??t uncover a new flaw. WPA2 Rainbow tables(2) have been around for a while and you gain a huge speed advantages in this case. Pure brute forcing the entire ASCII passwords can be done without a pre generated dictionary and they didn‚??t discuss any speed trade-off by doing this.  I would love to see a follow-up with comparisons.


Check with your library and see if they have it, or if they can do a interlibrary loan. What do you think of the paper?

 

1. Tsitroulis, Achilleas, Dimitris Lampoudis, and Emmanuel Tsekleves. "Exposing WPA2 security protocol vulnerabilities." International Journal of Information and Computer Security 6.1 (2014): 93-107.

2. "The Renderlab: Church of Wifi WPA-PSK Lookup Tables." 2006. 2 May. 2014 <hxxp://www.renderlab.net/projects/WPA-tables/>

 

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Tom Webb

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