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Internet Explorer "onunload" Event Spoofing Vulnerability

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Release Date:  2007-02-23    Last Update:  2007-10-09    Views:  34,698

Secunia Advisory SA23014

Where:

From remote

Impact:

Spoofing

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Secunia Research has discovered a vulnerability in Internet Explorer, which can be exploited by a malicious website to spoof the address bar.

The vulnerability is caused due to an error in Internet Explorer's handling of "onunload" events, enabling a malicious website to abort the loading of a new website. This can be exploited to spoof the address bar if e.g. the user enters a new website manually in the address bar, which is commonly exercised as best practice.

The vulnerability is confirmed on a fully patched Windows XP SP2 system running Internet Explorer 7 or Internet Explorer 6. Other versions may also be affected.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Originally discovered by:
* Jakob Balle, Secunia Research

Independently discovered and publicly disclosed by:
* Michal Zalewski

Original Advisory:
MS07-057 (KB939653):
http://www.microsoft.com/technet/security/Bulletin/MS07-057.mspx

Secunia Research:
http://secunia.com/secunia_research/2007-1/

Deep Links:
Links available to Secunia VIM customers

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 information to vuln@secunia.com

Subject: Internet Explorer "onunload" Event Spoofing Vulnerability

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