CVE-2022-39374
MEDIUMSynapse 1.62.0-1.67.9 - Denial of Service via Malicious Homeserver State Manipulation
Title source: llmDescription
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0
References (3)
Core 3
Core References
Mitigation, Vendor Advisory x_refsource_confirm
https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7
Issue Tracking, Patch x_refsource_misc
https://github.com/matrix-org/synapse/pull/13723
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD/
Scores
CVSS v3
6.5
EPSS
0.0094
EPSS Percentile
56.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-400
Status
published
Products (2)
matrix/synapse
1.62.0 - 1.68.0
pypi/matrix-synapse
1.62.0 - 1.68.0rc1PyPI
Published
May 26, 2023
Tracked Since
Feb 18, 2026