Course

The Code Review Patch challenges are designed to enhance your skills in identifying and understanding vulnerabilities in code. Each challenge provides you with a piece of vulnerable code and its subsequent patch. The exercise encourages you to first attempt to locate the vulnerability on your own. This process helps you develop a keen eye for spotting potential security flaws in code. If you are unable to find the issue, or if you want to verify your findings, the patch is available as a reference.

In these challenges, you will examine a specific piece of code from the Jetty project, focusing on the `MultiPartFilter` class, which handles multipart/form-data streams. The patch addresses issues such as limiting the number of form keys to mitigate DOS attacks and ensuring that uploaded files are properly managed and deleted if necessary. By analyzing both the original code and the patch, you will gain insights into common vulnerabilities and best practices for securing web applications.