The CRLF Injection Attack (sometimes also referred to as HTTP Response Splitting) is a fairly simple, yet extremely powerful web attack.  Hackers are actively exploiting this web application vulnerability to perform a large variety of attacks that include XSS cross-site scripting, cross-user defacement, positioning of client’s web-cache, hijacking of web pages, defacement and a myriad of other related attacks.  A number of years ago a number of CRLF injection vulnerabilities were also discovered in Google’s Adwords web interface.

Click here to learn more about CRLF injection attacks, and how to find and fix such vulnerabilities in your web applications.