Check Point Advisories

Apple WebKit Use After Free Code Execution (CVE-2017-13796)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-1078
Date Published:	19 Dec 2017
Severity:	Medium
Last Updated:	Wednesday 03 January, 2018
Source:	Google Project Zero
Industry Reference:	CVE-2017-13796
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	iOS 11.1 and earlier Safari 11.0.1 and earlier iCloud 7.1 and earlier for Window iTunes 12.7.1 and earlier for Window tvOS 11.1 and earlier
Vulnerability Description	A remote code execution vulnerability exists in Apple's WebKit. The vulnerability is due to the way the scripting engine handles objects in memory. A remote unauthenticated attacker could exploit this vulnerability by enticing the target user to open a specially crafted web page.

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 Apple WebKit Use After Free Code Execution (CVE-2017-13796) 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: Apple WebKit Use After Free Code Execution (CVE-2017-13796)