CVE-2023-43796 Affecting matrix-synapse package, versions <1.95.1-1
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-MATRIXSYNAPSE-6042780
- published 2 Nov 2023
- disclosed 31 Oct 2023
Introduced: 31 Oct 2023
CVE-2023-43796 Open this link in a new tabHow to fix?
Upgrade Debian:unstable matrix-synapse to version 1.95.1-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream matrix-synapse package and not the matrix-synapse package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2023-43796
- https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f
- https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575
- 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