Check Point Advisories

Sophos Anti-Virus RAR VMSF_RGB Filter Parsing Integer Underflow

Vulnerability
Protection

Check Point Reference:	CPAI-2012-1307
Date Published:	13 Dec 2012
Severity:	High
Last Updated:	Sunday 16 November, 2014
Source:
Protection Provided by:	Security Gateway R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description	An integer underflow vulnerability has been reported in Sophos Anti-Virus. The vulnerability is due to insufficient parameters validation while parsing RAR files. A remote attacker could exploit this vulnerability by causing the affected software to process a specially crafted RAR file. Successful exploitation could result in arbitrary code execution in the context of the affected service.

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 Sophos Anti-Virus RAR VMSF_RGB Filter Parsing Integer Underflow 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: Sophos Anti-Virus RAR VMSF_RGB Filter Parsing Integer Underflow