Vulnerability Description
Synapse is an open-source Matrix homeserver. Synapse before version 1.106 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. Synapse 1.106 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Matrix | Synapse | < 1.106.0 |
Related Weaknesses (CWE)
References
- https://github.com/element-hq/synapse/security/advisories/GHSA-gjgr-7834-rhxrVendor Advisory
- https://github.com/matrix-org/matrix-spec-proposals/pull/3916Issue TrackingPatch
FAQ
What is CVE-2024-37303?
CVE-2024-37303 is a vulnerability with a CVSS score of 5.3 (MEDIUM). Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and caching of remote media from a remote homeser...
How severe is CVE-2024-37303?
CVE-2024-37303 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-2024-37303?
Check the references section above for vendor advisories and patch information. Affected products include: Matrix Synapse.