Debian Bug report logs -
#1055255
matrix-synapse: CVE-2023-43796
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Bug#1055255
; Package src:matrix-synapse
.
(Thu, 02 Nov 2023 21:27:04 GMT) (full text, mbox, link).
Acknowledgement sent
to Salvatore Bonaccorso <carnil@debian.org>
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New Bug report received and forwarded. Copy sent to carnil@debian.org, team@security.debian.org, Matrix Packaging Team <pkg-matrix-maintainers@lists.alioth.debian.org>
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(Thu, 02 Nov 2023 21:27:04 GMT) (full text, mbox, link).
Message #5 received at submit@bugs.debian.org (full text, mbox, reply):
Source: matrix-synapse
Version: 1.95.0-1
Severity: grave
Tags: security upstream
X-Debbugs-Cc: carnil@debian.org, Debian Security Team <team@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
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