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CVE-2022-39200

7.3 · HIGH

Dendrite is a Matrix homeserver written in Go.

Published Sep 12, 2022CWE-347EPSS 0.36%

Overview

CVE-2022-39200 is a high-severity vulnerability. It was published on September 12, 2022 and has a CVSS 3.1 base score of 7.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Dendrite is a Matrix homeserver written in Go. In affected versions events retrieved from a remote homeserver using the `/get_missing_events` path did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint. Note that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified. Homeservers that have federation disabled are not vulnerable. The problem has been fixed in Dendrite 0.9.8. Users are advised to upgrade. There are no known workarounds for this issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3GitHubgithub.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267cGitHubgithub.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3GitHubgithub.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c

How CyberStrike helps

Frequently asked questions

What is CVE-2022-39200?

CVE-2022-39200 is a high-severity vulnerability. It was published on September 12, 2022 and has a CVSS 3.1 base score of 7.3 (HIGH).

How severe is CVE-2022-39200?

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2022-39200?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-39200?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-39200 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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