Check Point Advisories

libpng Transparency Chunk Length Buffer Overflow - Ver2 (CVE-2004-0597)

Vulnerability
Protection

Check Point Reference:	CPAI-2014-0980
Date Published:	3 Mar 2014
Severity:	High
Last Updated:	Monday 03 March, 2014
Source:	CVE-2004-0597
Industry Reference:	CVE-2004-0597
Protection Provided by:	Security Gateway R77, R76, R75
Who is Vulnerable?
Vulnerability Description	The Portable Network Graphics (PNG) specification defines a datastream and an associated file format that provides a lossless, portable, image compression. libpng is a open source implementation of the PNG specification. A vulnerability exists in the way libpng handles the transparency chunk of a PNG image. A logic error in the process makes it possible to bypass a length check in the validation process. This error can cause a memory buffer on the stack to be overflowed. It is possible to exploit this vulnerability is such a way as to gain control of the process and execute injected code. In a simple attack case, when a vulnerable product opens the specially crafted PNG file, it will terminate from a memory access violation, creating a denial of service condition. In the case of a successful code execution, the actual behavior will depend on the injected code.

Protection Overview

This protection will detect and block 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,
Protection tab and select the version of your choice.

Security Gateway R77 / R76 / R75 / R71 / R70

In the IPS tab, click Protections and find the libpng Transparency Chunk Length Buffer Overflow - Ver2 protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name: SMTP Protection Violation.
Attack Information: libpng Transparency Chunk Length Buffer Overflow - Ver2