Check Point Advisories

Microsoft Excel Substream Parsing Integer Overflow (MS11-021) - Ver2 (CVE-2011-0097)

Vulnerability
Protection

Check Point Reference:	CPAI-2014-1427
Date Published:	16 Apr 2014
Severity:	High
Last Updated:	Wednesday 16 April, 2014
Source:	CVE-2011-0097
Industry Reference:	CVE-2011-0097
Protection Provided by:	Security Gateway R77, R76, R75
Who is Vulnerable?
Vulnerability Description	A use-after-free vulnerability has been reported in Microsoft Excel. The vulnerability is due to a failure while processing certain records in 0x400-type substreams of BIFF files. A remote attacker may exploit this issue by enticing a target user to open a specially crafted Excel file. Successful exploitation would allow an attacker to execute arbitrary code on the target system with the security privileges of the target 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,
Protection tab and select the version of your choice.

Security Gateway R77 / R76 / R75 / R71 / R70

In the IPS tab, click Protections and find the Microsoft Excel Substream Parsing Integer Overflow (MS11-021) - Ver2 protection using the Search tool and Edit the protection's settings.
Install policy on all modules.

SmartView Tracker will log the following entries:

Attack Name: Content Protection Violation.
Attack Information: Microsoft Excel Substream Parsing Integer Overflow (MS11-021) - Ver2