Check Point Advisories

Apple WebKit Out-of-bounds Read (CVE-2017-13785)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-1071
Date Published:	17 Dec 2017
Severity:	Medium
Last Updated:	Tuesday 19 December, 2017
Source:	Project Zero
Industry Reference:	CVE-2017-13785
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	iOS before 11.1. Safari before 11.0.1. iCloud before 7.1 on Windows. iTunes before 12.7.1 on Windows. tvOS before 11.1.
Vulnerability Description	An arbitrary code execution vulnerability has been discovered in Apple WebKit. The vulnerability is due to an error in Apple Webkit while handling certain display properties within the style blocks. A remote attacker could exploit this issue by enticing the target user to open a maliciously 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 Out-of-bounds Read (CVE-2017-13785) 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 Out-of-bounds Read (CVE-2017-13785)