Check Point Advisories

Google Chrome XSSAuditor Policy ByPass

Vulnerability
Protection

Check Point Reference:	CPAI-2015-0800
Date Published:	12 Jul 2015
Severity:	High
Last Updated:	Monday 20 July, 2015
Source:	Google
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Google Chrome 43.0.2357.130 and prior
Vulnerability Description	A policy bypass vulnerability exists in Google Chrome. The vulnerability is due to improper handling of script tags within svg tags. A remote attacker can exploit this vulnerability by enticing a user to follow a crafted URL. Successful exploitation will result in bypassing the XSSAuditor feature.

Protection Overview

This protection will detect and block 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 Google Chrome XSSAuditor Policy ByPass 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: Google Chrome XSSAuditor Policy ByPass