Exercises

This challenge covers building the Groovy1 gadget chain to reach remote code execution using only existing library classes.

This challenge covers wrapping a payload in a SignedObject to bypass signature-based validation before deserialization.

The model will freely tell you the key, but a server-side output filter scans every response before it reaches you. Any response containing the key is blocked. You need to get the model to reveal the key in a form the filter does not catch.

A server-side input filter inspects every message before it reaches the AI model. Messages containing certain blocked keywords are rejected and never forwarded. If your message makes it past the filter, the model will answer freely.

This challenge covers exploiting toString() through a wrapper class, the technique behind BadAttributeValueExpException in Commons Collections.

This challenge covers using readResolve() as a deserialization entry point to trigger a gadget chain after the object is restored.

This challenge covers exploiting Object.equals(), triggered during HashSet and HashMap deserialization, as a gadget entry point.

This challenge covers chaining multiple classes together into a multi-class gadget chain, bridging single-class exploits to real-world attacks.