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Internet Explorer 7 Popup Address Bar Spoofing Weakness
Secunia Advisory: SA22542
Release Date: 2006-10-25
Last Update: 2006-10-31
Popularity: 85,922 views

Critical:
Less critical
Impact: Spoofing
Where: From remote
Solution Status: Unpatched

Software:Microsoft Internet Explorer 7.x

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CVE reference:CVE-2006-5544


Description:
A weakness has been discovered in Internet Explorer, which can be exploited by malicious people to conduct phishing attacks.

The problem is that it's possible to display a popup with a somewhat spoofed address bar where a number of special characters have been appended to the URL. This makes it possible to only display a part of the address bar, which may trick users into performing certain unintended actions.

Secunia has constructed a demonstration, which is available at:
http://secunia.com/internet_explorer_7_popup_address_bar_spoofing_test/

The weakness is confirmed in Internet Explorer 7 on a fully patched Windows XP SP2 system.

Solution:
Do not follow links from untrusted sources.

Provided and/or discovered by:
Discovered by an anonymous person.

Changelog:
2006-10-27: Added link to US-CERT.
2006-10-31: Added CVE reference.

Other References:
US-CERT VU#347188:
http://www.kb.cert.org/vuls/id/347188

Reason for Rating:
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