Web Security Introduction Webserver hacking refers to ...

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The document discusses setting up a vulnerable Apache web server with third-party modules for testing purposes. It outlines the goals of finding vulnerabilities using various tools and setting up and cracking basic authentication on the server. The web server setup includes installing Apache 1.3.23, MySQL 3.23.49, PHP 4.2.0 and OpenSSL 0.9.6d. Useful tools mentioned are Httpdtype, a user discovery bug in Apache, Nikto for vulnerability scanning, and Wget for downloading website content.

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HTTP Response Splitting or CRLF injection is an attack technique which enables various attacks such as web cache poisoning, cross user defacement, hijacking pages with sensitive user information and our favorite, cross-site scripting (XSS). This attack technique, and the derived attacks from it, are relevant to most web environments and is the result of the application’s failure to reject illegal user input, in this case, input containing malicious or unexpected characters. The talk will cover the concept of the attack and will take you through some use cases.

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