Check Point Advisories

Internet Explorer Multiple COM Objects Memory Corruption (MS07-027; CVE-2007-0942; CVE-2007-0944; CVE-2007-0945; CVE-2007-2221)

Check Point Reference: CPAI-2007-066
Date Published: 9 May 2007
Severity: Critical
Last Updated: 28 Sep 2016
Industry Reference:CVE-2007-0942
Protection Provided by:

Security Gateway
R80, R77, R75, R71, R70, R65

Who is Vulnerable?
Vulnerability Description Microsoft Internet Explorer is the most widely used Internet browser. Multiple remote code execution vulnerabilities have been reported in Microsoft Internet Explorer. The vulnerabilities are due to several memory corruption errors in Microsoft Internet Explorer when instantiating the vulnerable COM objects as ActiveX Controls, when accessing a object that was already deleted, when handling a property method and when the 'mdsauth.dll' COM object within Microsoft Internet Explorer allows the overwrite of arbitrary files. Successful exploitation of these issues allows execution of arbitrary code on the vulnerable system.

Protection Overview

This protection will detect and block Various MS IE remote code execution vulnerabilities.Since the protections offered in this advisory may degrade performance and block access to legitimate files, Check Point users are advised to use these protections as a workaround till all systems are patched.

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 / R71 / R70 / R65

  1. In the IPS tab, click Protections and find the Internet Explorer Multiple COM Objects Memory Corruption (MS07-027) 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:  Web Client Enforcement Violation.
Attack Information:  Internet Explorer COM object memory corruption (MS07-027)

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