Check Point Advisories

Cisco WebEx Meetings Server and Center Remote Code Execution (CVE-2017-3823)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0067
Date Published:	26 Jan 2017
Severity:	Critical
Last Updated:	Sunday 23 December, 2018
Source:
Industry Reference:	CVE-2017-3823
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Cisco Systems WebEx Extension for Chrome prior to 1.0.7 Cisco Systems WebEx Extension for Firefox Cisco Systems WebEx Extension for Internet Explorer
Vulnerability Description	A remote code execution vulnerability exists in Cisco WebEx Meetings Server and WebEx Meetings Center browser extensions. The vulnerability is due to a design weakness in the API response parser within the extensions. A remote unauthenticated attacker could exploit this vulnerability by enticing a user open a maliciously crafted web page or link.

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

In the IPS tab, click Protections and find the Cisco WebEx Meetings Server and Center Remote Code Execution protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Client Enforcement Violation.
Attack Information: Cisco WebEx Meetings Server and Center Remote Code Execution