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Microsoft Office Excel Label Record Buffer Overflow

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Check Point Reference: CPAI-2012-032
Date Published:
Severity:
Source: MS
Industry Reference(s): CVE-2011-0098
Protection Provided by: Security Gateway
  • R75
Who is Vulnerable?
Microsoft Excel 2002
Microsoft Excel 2003
Microsoft Excel 2004 for Mac
Microsoft Excel 2007
Microsoft Excel 2008 for Mac
Microsoft Excel 2010
Vulnerability Description
A code execution vulnerability has been reported in Microsoft Office Excel.
Vulnerability Details
The vulnerability is due to a flaw in the parsing of Label record in Excel documents, causing a buffer overflow. Remote attackers can exploit this vulnerability by enticing target users to open a malicious Excel file. In an attack scenario, where arbitrary code is injected and executed on the target machine, the behaviour of the target is dependent on the intention of the malicious code. If such an attack is not executed successfully, the vulnerable application may terminate abnormally.

Protection Overview
This protection will detect and block the transferring of malformed Excel files over HTTP.

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 Microsoft Office Excel Label Record Buffer Overflow (MS11-021) 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: Content Protection Violation
Attack Information: Microsoft Office Excel label record buffer overflow (MS11-021)