CVE-2024-36402
Vulnerability from cvelistv5
Published
2025-01-16 19:19
Modified
2025-02-12 20:31
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
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.
References
security-advisories@github.comhttps://github.com/matrix-org/matrix-spec-proposals/pull/3916
security-advisories@github.comhttps://github.com/t2bot/matrix-media-repo/security/advisories/GHSA-8vmr-h7h5-cqhg
Impacted products
Vendor Product Version
t2bot matrix-media-repo Version: < 1.3.5
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