Check Point Advisories

Jellyfin Directory Traversal (CVE-2021-21402)

Check Point Reference: CPAI-2021-2092
Date Published: 1 Feb 2024
Severity: Medium
Last Updated: Thursday 01 February, 2024
Industry Reference:CVE-2021-21402
Protection Provided by:

Security Gateway
R81, R80, R77, R75

Who is Vulnerable? Jellyfin 10.7.1 and prior
Vulnerability Description A directory traversal vulnerability exists in Jellyfin. Successful exploitation of this vulnerability could allow an attacker to access arbitrary files on the affected system.

Protection Overview

This protection detects attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, click on Protection tab and select the version of your choice.

Security Gateway R81 / R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Jellyfin Directory Traversal (CVE-2021-21402) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Web Server Enforcement Violation.
Attack Information:  Jellyfin Directory Traversal (CVE-2021-21402)

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