Posted on 10/30/2004 1:05:40 PM PDT by FreedomCalls
The flaw, which was posted to the Bugtraq mailing list by Benjamin Franz, is exploited by placing two URLs and a table within a single HTML href tag, producing a link that looks like this:
http://www.microsoft.com |
The technique, which can be executed by anyone with basic knowledge of HTML, can be used to construct convicing fake URLs for use in phishing scams. The flaw is possible because Internet Explorer has difficulty processing improperly formed HTML. The attack opens one href tag, and then leaves that tag open while enclosing a second URL within a table. The browser displays the first URL in the status bar, but sends users to the second URL.
The flaw affects versions of IE up to 6.0.2800.1106 - which includes systems that haven't yet installed Windows XP SP2, but are current on all other critical updates from Windows Update - as well as the Safari browser for Macs. Users running Windows XP SP2 (IE version 6.0.2900) and the open source Firefox and Mozilla browsers are not affected.
Phishing attacks seek to trick account holders into divulging sensitive account information through the use of e-mails which appear to come from trusted financial institutions and retailers. Several previous URL spoofing weaknesses in Internet Explorer have been widely used by phishing attacks. The ability to display a fraudulent URL in the status bar is especially useful, as security-conscious users would check the status bar before clicking through. The technique does not disguise the URL displayed in the address bar upon arrival at the destination page, meaning alert users will recognize the spoof at that point. But the tactic could be used to send e-mail recipients and web surfers to pages that attempt to download malware upon loading, a common tactic used by phishers to install trojans and keyloggers.
Netcraft has developed a service to help banks and other financial organizations identify sites which may be trying to construct frauds, identity theft and phishing attacks by pretending to be the bank, or are implying that the site has a relationship with the bank when in fact there is none.
strange, when you right click on the link and hit properties, you get the real URL (johnkerry.com)
bump....
Firefox 1.0pr goes to President Bush's site, but IE goes to the Kerry site.
But in Firefox, right clicking and checking the properties opens the President's site anyway when you close the box. weird....
Browser Wars Ping!!
BTTT
Nice.
Thats why I have the status bar open.
.............
Thanks for the heads up.
Weird problem "solved".
In Firefox, your link acts as if it stretches all the way to the right, though I highlighted everything and nothing is there. Apparently I clicked on that empty space when closing the Properties box, and went to the President's site.
Does any other FF user see that? I don't see it in IE6.
Using Firefox 1.0PR, clicking the link takes you to georgewbush.com, opening it in a new tab goes to johnkerry.com.
mark for later
Interesting. I never would have thought of that, even with the coding errors I make due to incompetent typing and caffein withdrawl...or both.
I always thought I was the only person that actually used Mozilla Firefox until I found FR. Seems others here use it too. Firefox is a great browser.
'Nuff said.
I'm using Mozilla Firefox and that spoof works in my browser too! So it's not just Internet Exploder.
Opera shows Google/Google under both W98SE and Mandrake 9.2 (as expected), as does Konqueror under Mandrake. The mouseover popup in Opera isn't even fooled; it says Google too. Don't have any versions of ignorance exploiter to try it out on :-) Poor ie users. Poor microsoft victims.
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