// For flags

CVE-2021-43807

HTTP Method Spoofing in Opencast

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

1
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

Opencast is an Open Source Lecture Capture & Video Management for Education. Opencast versions prior to 9.10 allow HTTP method spoofing, allowing to change the assumed HTTP method via URL parameter. This allows attackers to turn HTTP GET requests into PUT requests or an HTTP form to send DELETE requests. This bypasses restrictions otherwise put on these types of requests and aids in cross-site request forgery (CSRF) attacks, which would otherwise not be possible. The vulnerability allows attackers to craft links or forms which may change the server state. This issue is fixed in Opencast 9.10 and 10.0. You can mitigate the problem by setting the `SameSite=Strict` attribute for your cookies. If this is a viable option for you depends on your integrations. We strongly recommend updating in any case.

Opencast es un software de código abierto para la captura de conferencias y administración de vídeo para la educación. Opencast versiones anteriores a la 9.10 permiten una suplantación del método HTTP, permitiendo cambiar el método HTTP asumido por medio del parámetro de la URL. Esto permite a atacantes convertir las peticiones HTTP GET en peticiones PUT o un formulario HTTP para enviar peticiones DELETE. Esto evita las restricciones impuestas a este tipo de peticiones y ayuda a realizar ataques de tipo cross-site request forgery (CSRF), que de otro modo no serían posibles. La vulnerabilidad permite a atacantes crear enlaces o formularios que pueden cambiar el estado del servidor. Este problema se ha corregido en Opencast versiones 9.10 y 10.0. Puede mitigar el problema al establecer el atributo "SameSite=Strict" para sus cookies. Si esta es una opción viable para usted depende de sus integraciones. Recomendamos encarecidamente la actualización en cualquier caso

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-11-16 CVE Reserved
  • 2021-12-14 CVE Published
  • 2024-08-04 CVE Updated
  • 2024-08-04 First Exploit
  • 2024-08-29 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
  • CWE-290: Authentication Bypass by Spoofing
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Apereo
Search vendor "Apereo"
Opencast
Search vendor "Apereo" for product "Opencast"
< 9.10
Search vendor "Apereo" for product "Opencast" and version " < 9.10"
-
Affected