This tweet highlights a critical security issue related to Remote Code Execution (RCE) on load balancers. When attackers achieve RCE on the load balancer, they effectively gain control over the edge of the network. This access allows them to bypass numerous security measures normally enforced downstream, such as Web Application Firewall (WAF) rules, origin protection mechanisms, and rate limiting controls. In other words, once the attacker owns the edge device (the load balancer), all these downstream protections become irrelevant, as the attacker can execute malicious code directly there. This type of vulnerability is extremely dangerous because it undermines the entire security posture of a web application's infrastructure. It emphasizes the importance of securing load balancers and ensuring they are free from exploitable vulnerabilities that could allow RCE.
Original tweet: https://twitter.com/EdgeDetectOps/status/2037635942496788880