Course

This exercise involves a code injection vulnerability in a Perl CGI script. Initially, by inspecting the traffic between the client and the server, you can understand how the site operates. The index page loads, followed by a request to the CGI script using JavaScript. Identifying the use of single or double quotes can help in triggering unexpected behavior within the application.

Once you've determined the type of quotes being used, you can proceed to gain command execution using backticks or other Perl functions like `system` or `exec`. By injecting commands such as `uname`, you can verify successful execution and complete the exercise. This lab emphasizes the importance of thorough analysis and understanding of how data is processed within web applications.