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Security Advisories: GSA_kwCzR0hTQS04dm1yLWg3aDUtY3FoZ84ABDcQ
matrix-media-repo (MMR) allows unauthenticated writes to the media repository, which may allow planting of problematic content
Impact
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.
Patches
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.
Workarounds
Though extremely limited, server operators can use more strict rate limits based on IP address.
References
https://github.com/matrix-org/matrix-spec-proposals/pull/3916
Permalink: https://github.com/advisories/GHSA-8vmr-h7h5-cqhgJSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS04dm1yLWg3aDUtY3FoZ84ABDcQ
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 1 day ago
Updated: about 1 hour ago
CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS Percentage: 0.00043
EPSS Percentile: 0.1136
Identifiers: GHSA-8vmr-h7h5-cqhg, CVE-2024-36402
References:
- https://github.com/t2bot/matrix-media-repo/security/advisories/GHSA-8vmr-h7h5-cqhg
- https://github.com/matrix-org/matrix-spec-proposals/pull/3916
- https://nvd.nist.gov/vuln/detail/CVE-2024-36402
- https://pkg.go.dev/vuln/GO-2025-3397
- https://github.com/advisories/GHSA-8vmr-h7h5-cqhg
Blast Radius: 1.0
Affected Packages
go:github.com/t2bot/matrix-media-repo
Dependent packages: 0Dependent repositories: 0
Downloads:
Affected Version Ranges: < 1.3.5
Fixed in: 1.3.5
All affected versions: 1.0.0, 1.0.1, 1.0.2, 1.1.0, 1.1.1, 1.1.2, 1.1.3, 1.2.0, 1.2.1, 1.2.2, 1.2.3, 1.2.4, 1.2.5, 1.2.6, 1.2.7, 1.2.8, 1.2.9, 1.2.10, 1.2.11, 1.2.12, 1.2.13, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.3.4
All unaffected versions: 1.3.5, 1.3.6, 1.3.7