Check Point Advisories

Internet Explorer OnBeforeUnload JavaScript Address Bar Spoofing (MS07-057; CVE-2007-3826)

Check Point Reference: CPAI-2007-296
Date Published: 24 Feb 2010
Severity: High
Last Updated: Wednesday 24 February, 2010
Source:
Industry Reference:CVE-2007-3826
Protection Provided by:

Security Gateway
R81, R80, R77, R75
Who is Vulnerable?
Vulnerability Description Microsoft Internet Explorer (IE) is a web browser application that is capable of rendering both static and dynamic web content. The application is primarily used for tasks related to web browsing, such as displaying HTML encoded pages, downloading files, etc. An address bar spoofing vulnerability exists in Microsoft Internet Explorer. The vulnerability is due to an improper resource handling when the user navigates via address bar to a trusted site. An attacker can exploit the vulnerability by constructing a specially crafted web page to spoof the legitimate site. In a successful exploit, the victim believes he had left a web page (after entering an address in the address bar) and the address bar implies that too, but in reality, Internet Explorer is prevented from doing so, and it continues to display assorted content originating from the attacker.

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 Internet Explorer OnBeforeUnload JavaScript Address Bar Spoofing (MS07-057) 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 OnBeforeUnload javascript address bar spoofing (MS07-057)

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