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Insecure Library Loading
Moderately critical

Opera Browser File Download Extension Spoofing

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Release Date:  2004-02-11    Last Update:  2005-08-11    Views:  56,177

Secunia Advisory SA10760

Where:

From remote

Impact:

Security Bypass

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


A vulnerability has been discovered in Opera, which can be exploited by malicious web sites to spoof the file extension of downloadable files.

The problem is that Opera can be tricked into opening a file with a different application than indicated by embedding a CLSID in the file name. This can be exploited to trick users into opening "trusted" file types, which are in fact malicious files.

A demonstration of the vulnerability can be found here:
http://secunia.com/Internet_Explorer_File_Download_Extension_Spoofing_Test/


Solution:
Update to version 7.50 or later.

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: Opera Browser File Download Extension Spoofing

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