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Sophos Anti-Virus RAR VMSF_RGB Filter Parsing Integer Underflow


Check Point Reference: CPAI-2012-1307
Date Published:
Source: Sophos Advisory 118424
Protection Provided by: Security Gateway
  • R75
Who is Vulnerable?
Sophos Threat Detection Engine Prior to 3.37.2
Vulnerability Description
An integer underflow vulnerability has been reported in Sophos Anti-Virus.
Vulnerability Details
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 product to the latest update. For information on how to update , go to SBP-2006-05, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R75 / R71 / R70

How Can I Protect My Network?

  1. 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.
  2. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: Security Products Enforcement Violation
Attack Information: Sophos Anti-Virus RAR VMSF_RGB Filter Parsing Integer Underflow