CVE-2021-33879

EIP tracks 1 public exploit for CVE-2021-33879. PoCs published by mmiszczyk.

AI-analyzed exploit summary This repository provides a detailed technical analysis of CVE-2021-33879, a vulnerability in Tencent GameLoop's update mechanism that allows MITM attackers to execute arbitrary code via spoofed update packages. The writeup includes a step-by-step reproduction process and XML payload example.

Tencent GameLoop before 4.1.21.90 downloaded updates over an insecure HTTP connection. A malicious attacker in an MITM position could spoof the contents of an XML document describing an update package, replacing a download URL with one pointing to an arbitrary Windows executable. Because the only integrity check would be a comparison of the downloaded file's MD5 checksum to the one contained within the XML document, the downloaded executable would then be executed on the victim's machine.