CVE-2022-39374
First published: Wed May 24 2023(Updated: )
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
Credit: security-advisories@github.com security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Matrix Synapse | >=1.62.0<1.68.0 |
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Reference Links
- https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7
- https://github.com/matrix-org/synapse/pull/13723
- https://nvd.nist.gov/vuln/detail/CVE-2022-39374
- https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-66.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD/
- https://github.com/advisories/GHSA-p9qp-c452-f9r7
Frequently Asked Questions
What is CVE-2022-39374?
CVE-2022-39374 is a vulnerability in Synapse, an open-source Matrix homeserver, that allows a malicious homeserver to trick Synapse into accepting previously rejected events into its view of the current state of a room.
How does CVE-2022-39374 impact Synapse?
CVE-2022-39374 allows a malicious homeserver to cause all further messages and state changes to be accepted by Synapse.
What is the severity of CVE-2022-39374?
The severity of CVE-2022-39374 is medium, with a CVSS score of 6.5.
What software versions are affected by CVE-2022-39374?
Versions of matrix-synapse between 1.62.0 and 1.68.0 are affected by CVE-2022-39374.
How can I fix CVE-2022-39374?
To fix CVE-2022-39374, you should update matrix-synapse to version 1.68.0 or higher.
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- version/matrix synapse/1.62.0