Check Point Advisories

Apple Safari WebKit SVG Markers Use-After-Free Memory Corruption (CVE-2011-1453)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-487
Date Published:	1 Nov 2011
Severity:	High
Last Updated:	Tuesday 22 November, 2011
Source:
Industry Reference:	CVE-2011-1453
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	A use-after-free vulnerability has been reported in Apple Safari. The vulnerability is due to an error while handling Scalable Vector Graphics (SVG) objects. A remote attacker may trigger this vulnerability by enticing a target user to open a specially crafted SVG document, possibly embedded in a web-page. Successful exploitation would allow an attacker to execute arbitrary code in the security context of the logged on user.

Protection Overview

This protection will detect and block the transferring of malicious SVG documents.

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 Safari WebKit SVG Markers Use-After-Free Memory Corruption 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 Safari WebKit SVG markers use-after-free memory corruption