CWE
754
EPSS
0.044%
Advisory Published
Advisory Published
Updated

CVE-2023-5967: Denial of Service via crashing the Calls Plugin

First published: Mon Nov 06 2023(Updated: )

Mattermost fails to properly validate requests to the Calls plugin, allowing an attacker sending a request without a User Agent header to cause a panic and crash the Calls plugin

Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com

Affected SoftwareAffected VersionHow to fix
go/github.com/mattermost/mattermost/server/v8=9.0.0
9.0.1
go/github.com/mattermost/mattermost/server/v8>=8.1.0<8.1.3
8.1.3
go/github.com/mattermost/mattermost/server/v8>=8.0.0<8.0.4
8.0.4
go/github.com/mattermost/mattermost-server/v6<7.8.12
7.8.12
Mattermost Mattermost<=7.8.11
Mattermost Mattermost>=8.0.0<=8.0.3
Mattermost Mattermost>=8.1.0<=8.1.2
<=7.8.11
>=8.0.0<=8.0.3
>=8.1.0<=8.1.2

Remedy

 Update Mattermost Server to versions 7.8.12, 8.0.4, 8.1.3 or higher. Alternatively, upgrade the Calls plugin to 0.17.1 or higher. 

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Frequently Asked Questions

  • What is the severity of CVE-2023-5967?

    The severity of CVE-2023-5967 is medium, with a severity value of 4.3.

  • How does CVE-2023-5967 affect Mattermost?

    CVE-2023-5967 affects Mattermost by allowing an attacker to crash the Calls plugin through a denial of service attack.

  • How can I exploit CVE-2023-5967?

    To exploit CVE-2023-5967, an attacker can send a request to the Calls plugin without a User Agent header, causing a panic and crashing the plugin.

  • How do I fix CVE-2023-5967?

    To fix CVE-2023-5967, upgrade Mattermost to version 7.8.12, 8.0.4, 8.1.3, or 9.0.1 depending on your current version.

  • Where can I find more information about CVE-2023-5967?

    More information about CVE-2023-5967 can be found at the following references: [Mattermost Security Updates](https://mattermost.com/security-updates), [NVD](https://nvd.nist.gov/vuln/detail/CVE-2023-5967), and [GitHub Advisories](https://github.com/advisories/GHSA-xvq6-h898-wcj8).

Contact

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