CVE-2024-36402: medium-severity vulnerability in t2bot matrix-media-repo
Unauthenticated writes to the media repository allow planting of problematic content in Matrix Media Repo
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.3epss 0.6%
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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected products
t2bot · matrix-media-repoRelated CVEs — t2bot matrix-media-repo
In the same product, most dangerous first.
CVE-2024-52791MEDIUMDenial of service through memory exhaustion in Matrix Media RepoEPSS 0.8%CVE-2024-36403MEDIUMDenial of service/high operating costs through unauthenticated downloads in Matrix Media RepoEPSS 0.7%CVE-2024-56515MEDIUMUntrusted file formats can be thumbnailed, invoking potentially further untrusted decoders in Matrix Media RepoEPSS 0.7%CVE-2024-52602MEDIUMServer-Side Request Forgery (SSRF) on redirects and federation in Matrix Media RepoEPSS 0.6%