Vulnerability · Published Jun 6, 2021 · Assigned by mitre
CVE-2021-33879
High 8.1
In plain English
A high-severity security flaw in the affected software. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
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.
Affected products (as reported)
References
- https://www.gameloop.com x_refsource_MISC
- https://github.com/mmiszczyk/cve-2021-33879 x_refsource_MISC