CVE-2024-37303
published 2024-12-03CVE-2024-37303: Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows, by design, unauthenticated remote participants to trigger a download and…
PriorityP431medium5.3CVSS 3.1
AVNACLPRNUINSUCNILAN
EPSS
0.42%
34.1th percentile
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.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | matrix-synapse | < matrix-synapse 1.116.0-1 (forky) | matrix-synapse 1.116.0-1 (forky) |
| element-hq | synapse | < 1.106 | 1.106 |
| matrix | synapse | < 1.106.0 | 1.106.0 |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
osv5.3MEDIUM
vendor_debian5.3MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
OSV
Synapse's unauthenticated writes to the media repository allow planting of problematic content
osv·2024-12-03
CVE-2024-37303 [MEDIUM] Synapse's unauthenticated writes to the media repository allow planting of problematic content
Synapse's unauthenticated writes to the media repository allow planting of problematic content
### Impact
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.
### Patches
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.
### Workarounds
Tho
GHSA
Synapse's unauthenticated writes to the media repository allow planting of problematic content
ghsa·2024-12-03
CVE-2024-37303 [MEDIUM] CWE-306 Synapse's unauthenticated writes to the media repository allow planting of problematic content
Synapse's unauthenticated writes to the media repository allow planting of problematic content
### Impact
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.
### Patches
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.
### Workarounds
Tho
OSV
CVE-2024-37303: Synapse is an open-source Matrix homeserver
osv·2024-12-03·CVSS 5.3
CVE-2024-37303 [MEDIUM] CVE-2024-37303: Synapse is an open-source Matrix homeserver
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.
Debian
CVE-2024-37303: matrix-synapse - Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows...
vendor_debian·2024·CVSS 5.3
CVE-2024-37303 [MEDIUM] CVE-2024-37303: matrix-synapse - Synapse is an open-source Matrix homeserver. Synapse before version 1.106 allows...
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.
Scope: local
forky: resolved (fixed in 1.116.0-1)
sid: resolved (fixed in 1.116.0-1)
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2024-12-03
Published