CVE-2023-43796
unknown
CVSS v3
—
CVSS v2
—
VIR risk
—
Description
Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.
Predictions
Exploit likelihood
30%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2023-43796
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | forky | fixed | 1.95.1-1 |
| debian | sid | fixed | 1.95.1-1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | matrix-synapse | <1.95.1 | 1.95.1 |
| PyPI | matrix-synapse | <daec55e1fe120c564240c5386e77941372bf458f||<1.95.1 | daec55e1fe120c564240c5386e77941372bf458f |
References
- https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575
- https://nvd.nist.gov/vuln/detail/CVE-2023-43796
- https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f
- https://github.com/matrix-org/synapse
- https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-230.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY
- https://security.gentoo.org/glsa/202401-12
- https://security-tracker.debian.org/tracker/CVE-2023-43796
Verify integrity in audit chain (admin only). AS-IS.