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Opera BitTorrent Header Parsing Vulnerability Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA26138  
Release Date: 2007-07-19
Last Update: 2007-07-27

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Opera 9.x

CVE reference:CVE-2007-3929 (Secunia mirror)

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Description:
A vulnerability has been reported in Opera, which can be exploited by malicious people to compromise a user's system

The vulnerability is caused due to Opera using already freed memory when parsing BitTorrent headers and can lead to an invalid object pointer being dereferenced. This can be exploited to execute arbitrary code, when the user is tricked into clicking on a specially crafted BitTorrent file and then removes it via a right-click from the download pane.

The vulnerability is reported in version 9.21 on Windows. Other versions may also be affected.

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, using the Network Software Inspector.

Solution:
Update to version 9.22.

Provided and/or discovered by:
Discovered by enhalos and reported via iDefense Labs.

Changelog:
2007-07-27: Added CVE reference.

Original Advisory:
Opera:
http://www.opera.com/docs/changelogs/windows/922/

iDefense:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=564



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

15 Related Secunia Security Advisories, displaying 10

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10. Opera Torrent File Handling Buffer Overflow Vulnerability

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