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CERT Coordination Center

Microsoft Internet Explorer 7 may allow address bar spoofing

Vulnerability Note VU#347188

Original Release Date: 2006-10-26 | Last Revised: 2006-10-26


Internet Explorer 7 may allow address bar spoofing in pop-up windows. This could let an attacker spoof the address of a web site.


Internet Explorer 7 includes a new feature called "Address bar protection." This makes sure that every window, including pop-ups, will present an address bar to the user. By using a specially crafted URI, an attacker can spoof this address bar in a pop-up window.


This vulnerability could be used to convince a user that the intruder's web site was actually a web site that the user trusts and might provide sensitive information to.


We are currently unaware of a practical solution to this problem.

Disable Active scripting

Disabling Active scripting in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this vulnerability. Instructions for disabling Active scripting in the Internet Zone can be found in the "Securing Your Web Browser" document.

Verify web site certificates

Before providing sensitive information to a web site, verify the site's certificate as specified in US-CERT Cyber Security Tip ST05-010.

Vendor Information


Microsoft Corporation Affected

Updated:  October 26, 2006



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


Please disable Active scripting, as specified in the "Securing Your Web Browser" document.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector



This vulnerability was publicly disclosed by Secunia.

This document was written by Will Dormann.

Other Information

CVE IDs: None
Severity Metric: 2.84
Date Public: 2006-10-25
Date First Published: 2006-10-26
Date Last Updated: 2006-10-26 17:55 UTC
Document Revision: 7

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