Too Long; Didn't Read
Researchers found vulnerabilities in the implementation of the Game Networking Sockets library, which enable a variety of possible attacks. For example, an attacker can remotely crash the opponent’s game client to force a win. Under some conditions, they can even perform a “nuclear rage quit” and crash the Valve game server, making sure that no one gets to play. When playing a game developed by 3rd-party developers, one can do even better and remotely take over the game server to execute arbitrary code.