CVE-2021-33879

Public Exploit

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.

Category

8.1
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.85% Top 30%
Vendor Advisory gameloop.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://www.gameloop.com vendor advisory
https://github.com/mmiszczyk/cve-2021-33879 third party advisory exploit

Frequently Asked Questions

What is the severity of CVE-2021-33879?
CVE-2021-33879 has been scored as a high severity vulnerability.
How to fix CVE-2021-33879?
To fix CVE-2021-33879, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-33879 being actively exploited in the wild?
It is possible that CVE-2021-33879 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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