Discovering vulnerabilities in the software we used on a day to day basis is important as it forms the foundation for proactive defense against these vulnerabilities. Identifying these vulnerabilities in software, hardware, or network systems and then reporting them responsibly fosters continuous improvement in security and development practices. Finding vulnerabilities is a massive time investment with not many knowing how to approach the subject or topic.
Felipe and Alain wrote an interesting blog post on Neodyme about their approach to finding a remote code execution (RCE) zero-day in Counter-Strike: Global Offensive:
We identified three independent remote code execution (RCE) vulnerabilities in the popular Counter-Strike: Global Offensive game. Each vulnerability can be triggered when the game client connects to our malicious python CS:GO server. This post details our journey through the CS:GO binary and conducts a technical deep dive into various identified bugs. We conclude by presenting a proof of concept (POC) exploit that leverages four different logic bugs into remote code execution in the game’s client, triggered when a client connects to the server.
They had to use 4 bugs chained together to remote code execution on their side.
