CVE-2022-39200

 

Published at: - 12-09-2022 10:15

Last modified: - 15-09-2022 08:53

Total changes: - 2

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

 

Verification logic

 

Reference

• https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c
• https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3

 

Keywords

NVD

 

CVE-2022-39200

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures