// For flags

CVE-2021-33879

 

Severity Score

8.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Tencent GameLoop versiones anteriores a 4.1.21.90, descargaba actualizaciones mediante una conexión HTTP no segura. Un atacante malicioso en posición de MITM podría falsificar el contenido de un documento XML describiendo un paquete de actualización, reemplazando una URL de descarga por otra apuntando a un ejecutable arbitrario de Windows. Como la única comprobación de integridad sería la comparación del checksum MD5 del archivo descargado con la contenida en el documento XML, el ejecutable descargado se ejecutaría entonces en la máquina de la víctima

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-06-06 CVE Reserved
  • 2021-06-06 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2024-10-09 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-494: Download of Code Without Integrity Check
CAPEC
References (2)
URL Tag Source
URL Date SRC
https://github.com/mmiszczyk/cve-2021-33879 2024-08-04
URL Date SRC
URL Date SRC
https://www.gameloop.com 2021-06-15
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Tencent
Search vendor "Tencent"
 Gameloop
Search vendor "Tencent" for product "Gameloop"
 < 4.1.21.90
Search vendor "Tencent" for product "Gameloop" and version " < 4.1.21.90"
-
Affected