bugtraq - Internet Explorer URL parsing vulnerability

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Message-ID: <20031209144416.31613.qmail@sf-www2-symnsj.securityfocus.com>
Date: 9 Dec 2003 14:44:16 -0000
From: <bugtraq@...thedingbat.com>
To: bugtraq@...urityfocus.com
Subject: Internet Explorer URL parsing vulnerability

Internet Explorer URL parsing vulnerability
Vendor Notified 09 December, 2003

# Vulnerability ##########
There is a flaw in the way that Internet Explorer displays URLs in the address bar.

By opening a specially crafted URL an attacker can open a page that appears to be from a different domain from the current location. 

# Exploit ##########
By opening a window using the http://user@...ain nomenclature an attacker can hide the real location of the page by including a 0x01 character after the "@" character.
Internet Explorer doesn't display the rest of the URL making the page appear to be at a different domain. 

# POC ##########
http://www.zapthedingbat.com/security/ex01/vun1.htm

# Tested ##########
Internet Explorer
Version 6.0.2800.1106C0
Updates: SP1, Q810847, Q810351, Q822925, Q330994, Q828750, Q824145

# Credit ##########
Zap The Dingbat
http://www.zapthedingbat.com/