Check Point Advisories

Mozilla Firefox createImageBitmap Integer Overflow (CVE-2017-5428)

Vulnerability
Protection

Check Point Reference:	CPAI-2017-0467
Date Published:	5 Jun 2017
Severity:	Medium
Last Updated:	Wednesday 14 June, 2017
Source:	Mozilla
Industry Reference:	CVE-2017-5428
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?	Mozilla Foundation Firefox prior to 52.0.1 Mozilla Foundation Firefox ESR prior to 52.0.1
Vulnerability Description	An integer overflow exists in Mozilla Firefox. The vulnerability is due to an overly large value of image offset, length and layout arguments of createImageBitmap method. A remote 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 Mozilla Firefox createImageBitmap Integer Overflow 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: Mozilla Firefox createImageBitmap Integer Overflow