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Cracking CAPTCHA with Padding Oracle attack

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Published on Feb 18, 2010

This video shows how to crack all CAPTCHA in a target website using only JavaScript hosted on a different machine. We do that by exploiting Padding Oracle and web browsers cross-domain information leakage vulnerabilities.

One can easily turns this exploit into a distributed attack. Please see our paper at http://www.netifera.com/research for more technical details.

Thank you and happy hacking!

--Juliano Rizzo and Thai Duong

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