CVE-2021-33879
Tencent GameLoop before 4.1.21.90 downloaded updates over an insecure HTTP connection.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.02%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a 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.
- CVSS 3.1
- 8.1 HIGHCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 1.02% probability · 62th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-494
- Affected
- tencent/gameloop
- Source
- cve@mitre.org
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.