Check Point Advisories

PNG Image Invalid sPLT Chunk (CVE-2009-2984)

Vulnerability
Protection

Check Point Reference:	CPAI-2009-256
Date Published:	14 Oct 2009
Severity:	High
Last Updated:	Wednesday 14 October, 2009
Source:
Industry Reference:	CVE-2009-2984
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70
Who is Vulnerable?
Vulnerability Description	The Portable Network Graphics (PNG) specification is an image format used as an alternative to other image formats such as the GIF and TIFF formats. A denial of service vulnerability has been discovered in Adobe Acrobat. The vulnerability is due to the way that Adobe Acrobat handle malformed PNG files. A remote attacker may trigger this issue by convincing a user to open a specially crafted PNG image file. Successful exploitation will create a denial of service condition, causing the application to become non-responsive.

Protection Overview

This protection will detect and block attempts to transfer malformed TIFF files over HTTP.

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 / R71 / R70

In the IPS tab, click Protections and find the PNG Image Invalid sPLT Chunk 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: Content Protection Violation.
Attack Information: PNG image invalid sPLT chunk