CVE-2021-33879
Last modified
CVE-2021-33879 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 1.02% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Tencent | Gameloop | < 4.1.21.90 |
References
- https://github.com/mmiszczyk/cve-2021-33879Exploit, Third Party Advisory
- https://www.gameloop.comVendor Advisory
- https://github.com/mmiszczyk/cve-2021-33879Exploit, Third Party Advisory
- https://www.gameloop.comVendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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