bitlance winter has discovered a weakness in Internet Explorer, which can be exploited by malicious people to conduct phishing attacks.
Windows XP SP2 has a security feature, which forces the URL of a popup to the present in the title bar when a popup has been opened without the address bar.
The problem is that the title bar can be spoofed via an overly long hostname. This can e.g. be exploited by a malicious web site to trick a user into entering sensitive information in a popup placed over a trusted site.
The weakness has been confirmed on a fully patched system with Internet Explorer 6.0 and Microsoft Windows XP SP2.
Solution: Do not enter sensitive information in popups after following links from untrusted sources.
Do you have additional information related to this advisory?
Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this
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Subject: Microsoft Internet Explorer Popup Title Bar Spoofing Weakness
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