Check Point Advisories

Yealink Device Management Command Injection (CVE-2021-27561)

Check Point Reference: CPAI-2021-0914
Date Published: 2 Dec 2021
Severity: Critical
Last Updated: Thursday 02 December, 2021
Source:
Industry Reference:CVE-2021-27561
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable? Yealink Device Management (DM) 3.6.0.20
Vulnerability Description A command injection vulnerability exists in Yealink Device Management. The vulnerability is due to improper handling of a crafted HTTP request.

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 Yealink Device Management Command Injection (CVE-2021-27561) 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:  Yealink Device Management Command Injection (CVE-2021-27561)

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