Vulnerability Description
Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix. MMR before version 1.3.5 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeserver to the local media repository. Such content then also becomes available for download from the local homeserver in an unauthenticated way. The implication is that unauthenticated remote adversaries can use this functionality to plant problematic content into the media repository. MMR 1.3.5 introduces a partial mitigation in the form of new endpoints which require authentication for media downloads. The unauthenticated endpoints will be frozen in a future release, closing the attack vector. Though extremely limited, server operators can use more strict rate limits based on IP address as a partial workaround.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| T2Bot | Matrix-Media-Repo | < 1.3.5 |
Related Weaknesses (CWE)
References
- https://github.com/matrix-org/matrix-spec-proposals/pull/3916Issue Tracking
- https://github.com/t2bot/matrix-media-repo/security/advisories/GHSA-8vmr-h7h5-cqVendor Advisory
FAQ
What is CVE-2024-36402?
CVE-2024-36402 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix. MMR before version 1.3.5 allows, by design, unauthenticated remote participants to trigger a download and...
How severe is CVE-2024-36402?
CVE-2024-36402 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2024-36402?
Check the references section above for vendor advisories and patch information. Affected products include: T2Bot Matrix-Media-Repo.