Check Point Advisories

Microsoft Excel Sheet Name Memory Corruption - Ver2 (CVE-2007-3490)

Check Point Reference: CPAI-2007-290
Date Published: 26 Mar 2015
Severity: High
Last Updated: Thursday 26 March, 2015
Source:
Industry Reference:CVE-2007-3490
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Microsoft Excel is a popular spreadsheet application that is usually released as part of the Microsoft Office suite. The application can create complex spreadsheets with multiple workbooks, formulae, and various data sources. The proprietary file format used for storing Microsoft Excel documents is known as the Binary Interchange File Format (BIFF), with different versions of the application supporting different versions of the format. The common extension used for Microsoft Excel documents is .xls. A memory corruption vulnerability has been reported in Microsoft Excel. The vulnerability is due to the way Microsoft Excel parses malicious XLS files containing a specially crafted sheet name. A remote attacker could exploit this vulnerability by persuading a user to open a specially crafted XLS file, potentially causing arbitrary code to be injected and executed in the security context of the logged in user. In an attack case where code injection is not successful, the Microsoft Excel application will terminate. This can potentially lead to a loss of data. In a more sophisticated attack where code injection is successful, the behaviour of the target 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.

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 Excel Sheet Name Memory Corruption - Ver2 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 Excel Sheet Name Memory Corruption - Ver2

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