Vulnerability identifier: #VU24173

Vulnerability risk: Low

CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-285

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Synapse
Server applications / Conferencing, Collaboration and VoIP solutions

Vendor: Matrix.org

Description

The vulnerability allows a remote attacker to gain unauthorized access to certain functionality.

The vulnerability exists due to software does not check if the even belongs to a certain room before returning it. A remote authenticated user can gain access to events that belong to another room.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Synapse: 0.0.1 - 1.7.0

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External links
http://github.com/matrix-org/synapse/releases/tag/v1.7.1
http://github.com/matrix-org/synapse/pull/6530/files/02137bef51779880d1b16194e2d2de9a693dc512

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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.