CVE-2022-39335: Infoleak
First published: Wed May 24 2023(Updated: )
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. The Matrix Federation API allows remote homeservers to request the authorization events in a room. This is necessary so that a homeserver receiving some events can validate that those events are legitimate and permitted in their room. However, in versions of Synapse up to and including 1.68.0, a Synapse homeserver answering a query for authorization events does not sufficiently check that the requesting server should be able to access them. The issue was patched in Synapse 1.69.0. Homeserver administrators are advised to upgrade.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Matrix Synapse | <1.69.0 |
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Reference Links
- https://github.com/matrix-org/synapse/issues/13288
- https://github.com/matrix-org/synapse/pull/13823
- https://github.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwv
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS/
Frequently Asked Questions
What is CVE-2022-39335?
CVE-2022-39335 is a vulnerability in the Matrix Synapse server that allows remote homeservers to request unauthorized events in a room.
What is the impact of CVE-2022-39335?
The impact of CVE-2022-39335 is that it allows attackers to obtain unauthorized information by requesting the authorization events of events in a room.
How severe is CVE-2022-39335?
CVE-2022-39335 has a severity rating of medium.
Which software versions are affected by CVE-2022-39335?
Versions up to and excluding 1.69.0 of the Matrix Synapse server are affected by CVE-2022-39335.
How can I fix CVE-2022-39335?
To fix CVE-2022-39335, upgrade to version 1.69.0 or later of the Matrix Synapse server.
- collector/github-advisory
- alias/GHSA-45cj-f97f-ggwv
- alias/CVE-2022-39335
- collector/github-advisory-latest
- collector/nvd-latest
- vendor/matrix
- vendor/synapse
- collector/nvd-cve
- collector/nvd-index
- agent/author
- agent/description
- agent/event
- agent/first-publish-date
- agent/last-modified-date
- agent/references
- agent/remedy
- agent/severity
- agent/softwarecombine
- agent/tags
- agent/type
- agent/weakness
- package-manager/pip
- canonical/matrix synapse