Check Point Advisories

UPX Compressed PE Executable Files (CVE-2005-2920)

Vulnerability
Protection

Check Point Reference:	CPAI-2005-295
Date Published:	14 Mar 2010
Severity:	N/A
Last Updated:	Sunday 14 March, 2010
Source:
Industry Reference:	CVE-2005-2920
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 buffer overflow vulnerability exists in the ClamAV anti-virus product. The flaw is caused by an improper handling of UPX compressed executable files. This vulnerability may be exploited by malicious users to inject and execute arbitrary code on the target system. There are cases in which certain traffic, although not intended for malicious use, is very unsafe, since it may transfer shellcode which is undetectable by IPS.

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 UPX Compressed PE Executable Files 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: UPX compressed PE executable files