Information disclosure in Synapse Matrix



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2022-39335
CWE-ID CWE-200
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Synapse
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor Matrix.org

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Information disclosure

EUVDB-ID: #VU79748

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-39335

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

Exploit availability: No

Description

The vulnerability allows a remote user to gain access to potentially sensitive information.

The vulnerability exists due to excessive data output by the Matrix Federation API. A remote homeservers can request the authorization events in a room

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Synapse: All versions

CPE2.3 External links

https://github.com/matrix-org/synapse/issues/13288
https://github.com/matrix-org/synapse/security/advisories/GHSA-45cj-f97f-ggwv
https://github.com/matrix-org/synapse/pull/13823
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/T2MBNMZAFY4RCZL2VGBGAPKGB4JUPZVS/


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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