Java Serialize 01

This exercise is one of our challenges to help you learn Java Serialisation exploitation

PRO
Tier
Hard
< 1 Hr.
331

Course


In this lab, you will learn how to exploit a serialization issue in Java by writing your own Java program to create a malicious object and dump it as base64. The exercise focuses on using ObjectInputStream to unserialize arbitrary objects and leveraging a provided class, AnotherClass, to execute commands. By following the step-by-step instructions, you will understand how to build a straightforward gadget for code execution and prepare for more complex challenges ahead.

The video guide complements the written instructions, demonstrating how to use Java classes and methods to serialize and encode the object. You will get hands-on experience with creating an exploit, encoding it, and verifying its effectiveness on a vulnerable application. The lab emphasizes the importance of understanding the underlying mechanics of serialization and deserialization to craft effective exploits.

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