Source: matrix-synapse Version: 1.95.0-1 Severity: grave Tags: security upstream X-Debbugs-Cc: car...@debian.org, Debian Security Team <t...@security.debian.org>
Hi, The following vulnerability was published for matrix-synapse. CVE-2023-43796[0]: | 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. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2023-43796 https://www.cve.org/CVERecord?id=CVE-2023-43796 [1] https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 [2] https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f Regards, Salvatore
