CVE-2023-43796
Synapse Remote User Information Disclosure
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.
INFO
Published Date :
Oct. 31, 2023, 5:15 p.m.
Last Modified :
Nov. 21, 2024, 8:24 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2023-43796.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2023-43796 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2023-43796 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f Added Reference https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ Added Reference https://lists.fedoraproject.org/archives/list/[email protected]/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ Added Reference https://security.gentoo.org/glsa/202401-12 -
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Jan. 07, 2024
Action Type Old Value New Value Added Reference GitHub, Inc. https://security.gentoo.org/glsa/202401-12 [No types assigned] -
Modified Analysis by [email protected]
Dec. 28, 2023
Action Type Old Value New Value Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ Mailing List Changed Reference Type https://lists.fedoraproject.org/archives/list/[email protected]/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ No Types Assigned https://lists.fedoraproject.org/archives/list/[email protected]/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ Mailing List Added CPE Configuration OR *cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:* *cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 10, 2023
Action Type Old Value New Value Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ [No types assigned] Added Reference GitHub, Inc. https://lists.fedoraproject.org/archives/list/[email protected]/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ [No types assigned] -
Initial Analysis by [email protected]
Nov. 08, 2023
Action Type Old Value New Value Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N Changed Reference Type https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f No Types Assigned https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f Patch Changed Reference Type https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 No Types Assigned https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 Vendor Advisory Added CWE NIST NVD-CWE-noinfo Added CPE Configuration OR *cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:* versions up to (excluding) 1.95.1
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2023-43796 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2023-43796
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.20 }} -0.00%
score
0.57462
percentile