Check Point Advisories

Microsoft Visual Basic 6.0 VBP Project File Handling Buffer Overflow (CVE-2007-4776)

Check Point Reference: CPAI-2007-317
Date Published: 26 Nov 2009
Severity: High
Last Updated: Thursday 26 November, 2009
Source:
Industry Reference:CVE-2007-4776
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Microsoft Visual Basic is a tool for productively building type-safe and object-oriented applications. It allows developers to create a wide range of Windows, Web, mobile and Office applications. Visual Basic (VB) is an event driven programming language and associated development environment from Microsoft for its COM programming model. There exists a buffer overflow vulnerability in Microsoft Visual Basic product. The flaw is due to improper boundary protection when processing .VBP files. An attacker can leverage this vulnerability by enticing the target user to open a crafted .VBP file, potentially causing arbitrary code to be injected and executed in the security context of the current logged in user. In an attack case where code injection is not successful, all instances of the vulnerable Microsoft Visual Basic application will terminate. In a more sophisticated attack scenario where code injection is successful, the behaviour of the target host is entirely dependent on the intended function of the injected code. The code in such a case would execute within the security context of the current user. The affected application would also most likely stop functioning as a result of such an attack.

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

  1. In the IPS tab, click Protections and find the Microsoft Visual Basic 6.0 VBP Project File Handling Buffer Overflow protection using the Search tool and Edit the protection's settings.
  2. Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name:  Content Protection Violation.
Attack Information:  Microsoft Visual Basic 6.0 VBP project file handling buffer overflow

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