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Check Point Advisories

Apple WebKit Memory Corruption (CVE-2018-4233)

Check Point Reference: CPAI-2019-0017
Date Published: 31 Dec 2018
Severity: High
Last Updated: 12 Jun 2019
Industry Reference:CVE-2018-4233
Protection Provided by:

Security Gateway
R80, R77, R75

Who is Vulnerable? iOS before 11.4
Safari before 11.1.1
iCloud before 7.5 on Windows
iTunes before 12.7.5 on Windows
tvOS before 11.4
watchOS before 4.3.1
Vulnerability Description A remote code execution vulnerability exists in Apple WebKit. The vulnerability is due to a memory corruption when handling of objects in javascript JIT. A remote attacker could exploit the vulnerability by enticing the target user to open a specially crafted js webpage. Successful exploitation could cause memory corruption in a way that would allow attackers to execute code on the target system.

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

  1. In the IPS tab, click Protections and find the Apple WebKit Memory Corruption (CVE-2018-4233) protection using the Search tool and Edit the protection's settings.
  2. 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 Memory Corruption (CVE-2018-4233)

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