DeepSec 2013 Workshop: Exploiting Web Applications Protected By $WAFs

René Pfeiffer/ October 11, 2013/ Conference, Security, Training

We all use web applications on a daily basis. Search engines, portals, web sites, blogs, information pages and various other content accessible by web browsers accompany us every day. This means that web server are the first exposed systems you will have to protect when deploying web applications. Usually you would add filters to your network that inspect access to the software and block any malicious requests. Packet filters were the tool of choice. Now we have application level firewalls to deal with content and protocols used. In the case of web applications the market has introduced a new kind of device: the web application firewall (WAF). In theory WAFs understand HTTP and know how a web browser talks to a web server. In practice no two web applications are alike, because they may

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