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CVE-2022-39200

Signature checks not applied to some retrieved missing events

Published: Sep 12, 2022Updated: Nov 21, 2024 Sources: CVE List NVD GHSACWE-347
NVD MITRE
7.3CVSSHIGH
EPSS Score
0.3%
Top 79.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-347

Affected Products

dendritematrix
Mixed
Communications / messaging-chat
dendritematrix-org
Mixed
Communications / messaging-chat
github.com/matrix-org/dendriteGoOSS Libraries
matrixoss-projectGBCommunicationsaka synapse, matrix irc bridge, javascript sdk
matrix-orgoss-projectDECommunicationsaka synapse, matrix-js-sdk, matrix appservice irc
gopackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3
github.com
https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c
github.com
https://nvd.nist.gov/vuln/detail/CVE-2022-39200
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Sep 12, 2022
Last Updated
Nov 21, 2024

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