When performing a web application assessment, it is often important to be able to easily identify variation in HTTP requests or responses. The Comparer feature simplifies this process by providing a graphical overview of variation. In this recipe, we will discuss how to identify and evaluate varied server responses by using Burp Suite Comparer.
To use Burp Suite to perform web application analysis against a target, you will need to have a remote system that is running one or more web applications. In the examples provided, an instance of Metasploitable2 is used to perform this task. Metasploitable2 has several preinstalled vulnerable web applications running on TCP port 80. For more information on setting up Metasploitable2, refer to the Installing Metasploitable2 recipe in Chapter 1, Getting Started, of this book. Additionally, your web browser will need to be configured to proxy web traffic through a local instance of Burp Suite. For more information...