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Cross Service Relay Attack - Misconfigured audience claim
rest-jwt-basics | Level: Easy | Total Lab Runs: 0 | Premium Lab |
A REST API is running on the target machine and uses JWT based authentication. The implementation of JWT is very crucial for the safety of an API. The JWT tokens issued by one service must not be processed by another service.
The developers provide 3 APIs, a Finance API, a Products API and a Services API. This time the developers have used a custom audience claim to restrict the token usage across other services. But the issue is that the implementation of the audience claim is not correct. Interact with the API and explore how this implementation might be disastrous.
Objective: Your task is to get the Golden Ticket!
- This lab is dedicated to you! No other users are on this network :)
- Once you start the lab, you will have access to a Kali GUI instance.
- Your Kali instance has an interface with IP address 192.X.Y.2. Run "ifconfig" to know the values of X and Y.
- The Finance, Services and Products API are running on port 8000, 8080 and 8888 respectively on the target machine having IP address 192.X.Y.3.
- The JWT Token Library version used by all the APIs is 3.0.0.
- The JWT Token Library documentation is available on port 80 of the target machine having IP address 192.X.Y.3.
- Do not attack the gateway located at IP address 192.X.Y.1
The following activities are strictly prohibited on this website unless otherwise explicitly stated as allowed in the mission statement:
- Using automated scanners
- Using brute force attacks
- Denial of Service attacks
- Attacking other student machines in challenges where you might achieve a shell on the vulnerable system
- Attacking the lab infrastructure
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