This talk illuminates Web Application Firewalls (WAFs), with particular focus on the negative detection model. It will present methods how they can be fingerprinted and circumvented in order to demonstrate the wrong feeling of security they might create. Furthermore the tool tsakwaf (The Swiss Army Knife for Web Application Firewalls) will be covered, a little script written in perl that includes various code generation functions for circumventing WAFs and a fingerprinting routine to identify supported WAFs.

Of course there will be some nice demos to prove the point and the speakers will also share their experience from daily web application pentest tasks. Finally, as a special gift, an enhanced version of TSAKWAF will be released at Troopers.

Learn more about the speakers:

Frank Block
Michael Thumann