CVE-2021-33879: High severity tencent gameloop vulnerability
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 Software
Event History
Frequently Asked Questions
What is CVE-2021-33879?
CVE-2021-33879 is a vulnerability in Tencent GameLoop before version 4.1.21.90 that allows a malicious attacker in an MITM position to spoof the contents of an XML document describing an update package.
How does CVE-2021-33879 work?
CVE-2021-33879 works by downloading updates over an insecure HTTP connection, allowing an attacker to replace a download URL with one pointing to an arbitrary Windows executable.
What is the severity of CVE-2021-33879?
The severity of CVE-2021-33879 is high, with a CVSS score of 8.1.
How can I fix CVE-2021-33879?
To fix CVE-2021-33879, update Tencent GameLoop to version 4.1.21.90 or higher, which addresses the vulnerability and uses secure HTTPS connections for downloading updates.
Where can I find more information about CVE-2021-33879?
You can find more information about CVE-2021-33879 on the GitHub repository https://github.com/mmiszczyk/cve-2021-33879 and the official GameLoop website https://www.gameloop.com.