Vulnerability Details CVE-2022-39374
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
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 37.3%
CVSS Severity
CVSS v3 Score 6.5
References
- https://github.com/matrix-org/synapse/pull/13723
- https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD/
- https://github.com/matrix-org/synapse/pull/13723
- https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD/
Products affected by CVE-2022-39374
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cpe:2.3:a:matrix:synapse:1.62.0
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cpe:2.3:a:matrix:synapse:1.63.0
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cpe:2.3:a:matrix:synapse:1.63.1
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cpe:2.3:a:matrix:synapse:1.64.0
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cpe:2.3:a:matrix:synapse:1.65.0
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cpe:2.3:a:matrix:synapse:1.66.0
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cpe:2.3:a:matrix:synapse:1.67.0