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TITLE:
Opera BitTorrent Header Parsing Vulnerability

SECUNIA ADVISORY ID:
SA26138

VERIFY ADVISORY:
http://secunia.com/advisories/26138/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Opera 9.x
http://secunia.com/product/10615/

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.

SOLUTION:
Update to version 9.22.

PROVIDED AND/OR DISCOVERED BY:
Discovered by enhalos and reported via iDefense Labs.

ORIGINAL ADVISORY:
Opera:
http://www.opera.com/docs/changelogs/windows/922/

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

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