CVE-2023-43796

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f	Patch
https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575	Vendor Advisory
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
https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f	Patch
https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575	Vendor Advisory
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

Configurations

Configuration 1 (hide)

cpe:2.3:a:matrix:synapse:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:38:::::::*
	cpe:2.3:o:fedoraproject:fedora:39:::::::*

History

21 Nov 2024, 08:24

Type	Values Removed	Values Added
References	~~() https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f - Patch~~	() https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f - Patch
References	~~() https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 - Vendor Advisory~~	() https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 - Vendor Advisory
References	~~() 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/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ - Mailing List
References	~~() https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ - Mailing List~~	() https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ - Mailing List
References	~~() https://security.gentoo.org/glsa/202401-12 -~~	() https://security.gentoo.org/glsa/202401-12 -

07 Jan 2024, 11:15

Type	Values Removed	Values Added
References		() https://security.gentoo.org/glsa/202401-12 -

28 Dec 2023, 16:13

Type	Values Removed	Values Added
References	~~() https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ -~~	() https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ - Mailing List
References	~~() https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ -~~	() https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ - Mailing List
First Time		Fedoraproject fedora Fedoraproject
CPE		cpe:2.3:o:fedoraproject:fedora:38:::::::* cpe:2.3:o:fedoraproject:fedora:39:::::::*

10 Nov 2023, 03:15

Type	Values Removed	Values Added
References		() https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VH3RNC5ZPQZ4OKPSL4E6BBJSZOQLGDEY/ - () https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2IDEEZMFJBDLTFHQUTZRJJNCOZGQ2ZVS/ -

08 Nov 2023, 17:59

Type	Values Removed	Values Added
CWE	~~CWE-200~~	NVD-CWE-noinfo
CPE		cpe:2.3:a:matrix:synapse::::::::
References	~~(MISC) https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 -~~	(MISC) https://github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575 - Vendor Advisory
References	~~(MISC) https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f -~~	(MISC) https://github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f - Patch
First Time		Matrix Matrix synapse
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3

31 Oct 2023, 17:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2023-10-31 17:15

Updated : 2024-11-21 08:24

NVD link : CVE-2023-43796

Mitre link : CVE-2023-43796

CVE.ORG link : CVE-2023-43796

JSON object : View

Products Affected

fedoraproject

fedora

matrix

synapse

CWE

CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

NVD-CWE-noinfo

5.3 /10