Vulnerability Report

CVE-2021-33879

Title: Tencent Gameloop

Other

Proof Of Concept

PoC Available for CVE-2021-33879

CWE Category CWE-494
Published Date Jun 06, 2021
Modified Date Nov 21, 2024
Exploit Status Available
Score 8.1 CVSS v3.1
Exploit Probability (EPSS)
0.85%

Vulnerability Summary

CVE-2021-33879: 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.

Impacted Vendors

T
tencent 1

Reference Links

https://github.com/mmiszczyk/cve-2021-33879 https://www.gameloop.com https://github.com/mmiszczyk/cve-2021-33879 https://www.gameloop.com
CVSS v3.1
Source Entity [email protected]
Severity HIGH
8.1
Attack Vector
NETWORK
Complexity
HIGH
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v2.0
Source Entity [email protected]
Severity MEDIUM
6.8
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:M/Au:N/C:P/I:P/A:P

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2021-33879 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/mmiszczyk/cve-2021-33879
View Code
MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity HIGH
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.