Check Point Advisories

ClamAV UPX File Handling Heap Overflow (CVE-2006-4018)

Vulnerability
Protection

Check Point Reference:	CPAI-2006-235
Date Published:	27 Jul 2010
Severity:	High
Last Updated:	Monday 26 March, 2012
Source:
Industry Reference:	CVE-2006-4018
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 several archive formats in order to scan their internal items for viruses. One of such archive formats is the UPX (Ultimate Packer for eXecutables) file format. A heap buffer overflow vulnerability exists in the ClamAV AntiVirus product. The vulnerability can be triggered when the application processes crafted UPX files. An unauthenticated attacker can exploit this vulnerability by delivering a crafted file to the scanning service resulting in injection and execution of arbitrary code. In case of an attack aimed at creating a denial of service condition, the affected ClamAV daemon will terminate. In case of an attack where code injection and execution is successful, the behavior of the system is dependent on the intended purpose of the injected code. Any code injected into the vulnerable component would execute in the security context of the affected ClamAV 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 UPX File Handling Heap 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: Security Products Enforcement Violation.
Attack Information: ClamAV UPX file handling heap overflow