Check Point Advisories

Adobe Flash Player Security Bypass (APSB16-18: CVE-2016-4139)

Vulnerability
Protection

Check Point Reference:	CPAI-2016-0789
Date Published:	9 Aug 2016
Severity:	Critical
Last Updated:	Tuesday 13 September, 2016
Source:	Adobe APSB16-18
Industry Reference:	CVE-2016-4139
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Adobe Flash Player Desktop Runtime 21.0.0.242 and earlier Adobe Flash Player Extended Support Release 18.0.0.352 and earlier Adobe Flash Player for Google Chrome 21.0.0.242 and earlier Adobe Flash Player for Microsoft Edge and Internet Explorer 11 21.0.0.242 and earlier Adobe Flash Player for Linux 11.2.202.621 and earlier
Vulnerability Description	When calling window location toString() or comparing window location toString is called an attacker can return arbitrary values. An attacker can make the applet believe that it is embedded inside the hosting page, by overriding window location toString. Hence, an attacker can call any method that is exposed on the SWF script to same domain JavaScript.
Update/Patch Avaliable	Apply patches from: APSB16-18

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 Adobe Flash Player Security Bypass (APSB16-18: CVE-2016-4139) 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: Adobe Flash Protection Violation.
Attack Information: Adobe Flash Player Security Bypass (APSB16-18: CVE-2016-4139)