Check Point Advisories

ClamAV AntiVirus cli_check_jpeg_exploit Function Denial of Service (CVE-2008-5314)

Vulnerability
Protection

Check Point Reference:	CPAI-2008-382
Date Published:	1 Oct 2009
Severity:	High
Last Updated:	Thursday 01 October, 2009
Source:
Industry Reference:	CVE-2008-5314
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	ClamAV AntiVirus is an open source product that provides anti-virus scanning utilities and an anti-virus library. The product is capable of decoding and scanning several file formats including image formats like JPEG. A buffer overflow vulnerability exists in the ClamAV AntiVirus product. The vulnerability can be triggered when the application processes crafted JPEG files. An unauthenticated attacker can exploit this vulnerability by delivering a crafted file to the scanning service resulting in an unchecked recursion which consumes the stack and causes a Denial of Service condition. In an attack case, the affected ClamAV daemon will terminate. This might allow for further exploitation of the target system, exposing the system to other threats in absence of the AntiVirus daemon.

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, 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 ClamAV AntiVirus cli_check_jpeg_exploit Function Denial of Service 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: Security Products Enforcement Violation.
Attack Information: ClamAV AntiVirus cli_check_jpeg_exploit function denial of service