CVE-2019-18835
First published: Thu Nov 07 2019(Updated: )
Matrix Synapse before 1.5.0 mishandles signature checking on some federation APIs. Events sent over /send_join, /send_leave, and /invite may not be correctly signed, or may not come from the expected servers.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/matrix-synapse | <1.5.0 | 1.5.0 |
| Matrix Synapse | <1.5.0 |
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2019-18835
- https://github.com/matrix-org/synapse/pull/6262
- https://github.com/matrix-org/synapse/releases/tag/v1.5.0
- https://github.com/matrix-org/synapse/commit/172f264ed38e8bef857552f93114b4ee113a880b
- https://github.com/advisories/GHSA-cppw-2mf8-qpm5 (Advisory)
- https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2019-186.yaml
Frequently Asked Questions
What is CVE-2019-18835?
CVE-2019-18835 is a vulnerability in Matrix Synapse before version 1.5.0 that mishandles signature checking on some federation APIs.
What is the severity of CVE-2019-18835?
CVE-2019-18835 has a severity rating of 9.8 out of 10, which is considered critical.
How does CVE-2019-18835 affect Matrix Synapse?
CVE-2019-18835 affects Matrix Synapse versions before 1.5.0 by causing mishandling of signature checking on certain federation APIs.
How can CVE-2019-18835 be fixed?
CVE-2019-18835 can be fixed by updating Matrix Synapse to version 1.5.0 or later.
Are there any references for CVE-2019-18835?
Yes, you can find references for CVE-2019-18835 at the following links: [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-18835), [GitHub Pull Request](https://github.com/matrix-org/synapse/pull/6262), [GitHub Release](https://github.com/matrix-org/synapse/releases/tag/v1.5.0).
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