Check Point Advisories

Microsoft Internet Explorer MHTML Content Blocks Information Disclosure (CVE-2011-0096; CVE-2011-1894)

Vulnerability
Protection

Check Point Reference:	CPAI-2011-006
Date Published:	30 Jan 2011
Severity:	High
Last Updated:	Monday 09 November, 2015
Source:
Industry Reference:	CVE-2011-0096 CVE-2011-1894
Protection Provided by:	Security Gateway R81, R80, R77, R75, R71, R70, R65
Who is Vulnerable?
Vulnerability Description	MHTML (MIME Encapsulation of Aggregate HTML) is an Internet standard that defines the MIME structure that is used to wrap HTML content. An information disclosure vulnerability has been reported in Microsoft Windows MHTML protocol. The vulnerability is due to the way MHTML interprets MIME-formatted requests for content blocks within a document. To trigger this flaw, an attacker can specially craft a malicious web page and entice a target user to access it. Successful exploitation of this vulnerability may allow a remote attacker to access sensitive information on behalf 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, click on Protection tab and select the version of your choice.

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

In the IPS tab, click Protections and find the Microsoft Internet Explorer MHTML Content Blocks Information Disclosure protection using the Search tool and Edit the protection's settings.
Install policy on all Security Gateways.

This protection's log will contain the following information:

Attack Name: Web Client Enforcement Violation.
Attack Information: Microsoft Internet Explorer MHTML Content Blocks Information Disclosure