Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apereo | Opencast | < 9.10 |
Related Weaknesses (CWE)
References
- https://github.com/opencast/opencast/commit/59cb6731067283e54f15462be38b6117d8b9PatchThird Party Advisory
- https://github.com/opencast/opencast/commit/8f8271e1085f6f8e306c689d6a56b0bb8d07PatchThird Party Advisory
- https://github.com/opencast/opencast/security/advisories/GHSA-j4mm-7pj3-jf7vExploitPatchThird Party Advisory
- https://github.com/opencast/opencast/commit/59cb6731067283e54f15462be38b6117d8b9PatchThird Party Advisory
- https://github.com/opencast/opencast/commit/8f8271e1085f6f8e306c689d6a56b0bb8d07PatchThird Party Advisory
- https://github.com/opencast/opencast/security/advisories/GHSA-j4mm-7pj3-jf7vExploitPatchThird Party Advisory
FAQ
What is CVE-2021-43807?
CVE-2021-43807 is a vulnerability with a CVSS score of 7.5 (HIGH). 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. T...
How severe is CVE-2021-43807?
CVE-2021-43807 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-43807?
Check the references section above for vendor advisories and patch information. Affected products include: Apereo Opencast.