Check Point Advisories

Cisco IP Phone Denial of Service (CVE-2020-3161)

Check Point Reference: CPAI-2020-0369
Date Published: 21 May 2020
Severity: Medium
Last Updated: 21 May 2020
Industry Reference:CVE-2020-3161
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable? IP Phone 7811, 7821, 7841, 7861 Desktop Phones - Before version 11.7.
IP Phone 8811, 8841, 8845, 8851, 8861, 8865 Desktop Phones - Before version 11.7.
Unified IP Conference Phone 8831 - Before version 10.3.
Wireless IP Phone 8821, 8821-EX - Before version 11.0.
Vulnerability Description A denial of service vulnerability exists in Cisco IP Phone. A remote unauthenticated attacker can exploit this vulnerability to cause a denial of service condition on an 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 R80 / R77 / R75

  1. In the IPS tab, click Protections and find the Cisco IP Phone Denial of Service (CVE-2020-3161) 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:  Cisco Protection Violation.
Attack Information:  Cisco IP Phone Denial of Service (CVE-2020-3161)

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