Summary

A remote code execution vulnerability in python-socketio versions prior to 5.14.0 allows attackers to execute arbitrary Python code through malicious pickle deserialization in multi-server deployments on which the attacker previously gained access to the message queue that the servers use for internal communications. You can find a detailed analysis of this vulnerability in the GitHub Advisory.

Run

There are three docker containers involved in this demo:

1. Redis Server: Acts as the message broker.
2. Vulnerable Socket.IO Server: A Flask-based server that uses python-socketio to handle WebSocket connections and communicates via Redis.
3. Attacker Client: A client that connects to the Socket.IO server and sends a malicious payload to exploit the vulnerability.

There is a docker-compose.yml file that orchestrates these containers. To run the demo, execute the following command in the directory containing the docker-compose.yml file:

docker-compose up --build

This command will build and start all three containers. The Socket.IO server will be accessible at http://localhost:5000, and the attacker client will automatically attempt to exploit the vulnerability upon startup. You can check the directory for any files created by the exploit in the socketio_server container.