CVE-2023-43796

Synapse vulnerable to leak of remote user device information

Severity Score

5.3

*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 Prior to versions 1.95.1 and 1.96.0rc1, cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver. System administrators are encouraged to upgrade to Synapse 1.95.1 or 1.96.0rc1 to receive a patch. As a workaround, the `federation_domain_whitelist` can be used to limit federation traffic with a homeserver.

Synapse es un servidor doméstico Matrix de código abierto. Antes de las versiones 1.95.1 y 1.96.0rc1, la información del dispositivo almacenado en caché de usuarios remotos se puede consultar desde Synapse. Esto se puede utilizar para enumerar los usuarios remotos conocidos por un servidor doméstico. Se recomienda a los administradores del sistema que actualicen a Synapse 1.95.1 o 1.96.0rc1 para recibir un parche. Como workaround, se puede utilizar `federation_domain_whitelist` para limitar el tráfico de federación con un servidor doméstico.

*Credits: N/A

CVSS Scores

NISTv3.1 5.3

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2023-09-22 CVE Reserved
2023-10-31 CVE Published
2024-08-02 CVE Updated
2024-11-06 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-200: Exposure of Sensitive Information to an Unauthorized Actor

CAPEC

References (5)

URL	Tag	Source
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS	Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY	Mailing List
https://security.gentoo.org/glsa/202401-12

URL	Date	SRC

URL	Date	SRC
https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f	2024-01-07

URL	Date	SRC
https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575	2024-01-07

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"				< 1.95.1 Search vendor "Matrix" for product "Synapse" and version " < 1.95.1"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				38 Search vendor "Fedoraproject" for product "Fedora" and version "38"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				39 Search vendor "Fedoraproject" for product "Fedora" and version "39"		-		Affected