CVE-2022-39374

Synapse Denial of service due to incorrect application of event authorization rules during state resolution

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. If Synapse and a malicious homeserver are both joined to the same room, the malicious homeserver can trick Synapse into accepting previously rejected events into its view of the current state of that room. This can be exploited in a way that causes all further messages and state changes sent in that room from the vulnerable homeserver to be rejected. This issue has been patched in version 1.68.0

Synapse es un servidor doméstico Matrix de código abierto escrito y mantenido por la Fundación Matrix.org. Si Synapse y un servidor doméstico malicioso están unidos a la misma habitación, el servidor doméstico malicioso puede engañar a Synapse para que acepte eventos previamente rechazados en su vista del estado actual de esa sala. Esto se puede explotar de una manera que haga que todos los mensajes adicionales y los cambios de estado enviados en esa habitación desde el servidor doméstico vulnerable sean rechazados. Este problema se ha corregido en la versión 1.68.0

*Credits: N/A

CVSS Scores

NISTv3.1 6.5

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2022-09-02 CVE Reserved
2023-05-26 CVE Published
2024-06-01 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-400: Uncontrolled Resource Consumption

CAPEC

References (3)

URL	Tag	Source
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UJIJRP5ZH6B3KGFLHCAKR2IX2Y4Z25QD

URL	Date	SRC

URL	Date	SRC
https://github.com/matrix-org/synapse/pull/13723	2023-09-18

URL	Date	SRC
https://github.com/matrix-org/synapse/security/advisories/GHSA-p9qp-c452-f9r7	2023-09-18

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Matrix Search vendor "Matrix"		Synapse Search vendor "Matrix" for product "Synapse"				>= 1.62.0 < 1.68.0 Search vendor "Matrix" for product "Synapse" and version " >= 1.62.0 < 1.68.0"		-		Affected