Public Vulnerability Reports

Opera Software Opera Web Browser createSVGTransformFromMatrix Object Typecasting Vulnerability



Opera is a cross-platform web browser. More information is available at


Remote exploitation of a typecasting bug in Opera Software ASA's Opera Web browser could allow an attacker to execute arbitrary code on the affected host.

A flaw exists within Opera's Javascript SVG implementation. When processing a createSVGTransformFromMatrix request Opera does not properly validate the type of object passed to the function. Passing an incorrect object to this function can result in it using a pointer that is user controlled when it attempts to make the virtual function call.


Exploitation of this vulnerability would allow an attacker to execute arbitrary code on the affected host. The attacker would first need to construct a website containing the malicious JavaScript and trick the vulnerable user into visiting the site. This would trigger the vulnerability and allow the code to execute with the privileges of the local user.


iDefense has confirmed the existence of this vulnerability in Opera version 9.02 on both Windows and Linux. Previous versions may also be affected.


Disabling JavaScript will prevent the vulnerability from being triggered.


Opera Software has addressed this vulnerability in version 9.10. More information is available at the following link.


A Mitre Corp. Common Vulnerabilities and Exposures (CVE) number has not been assigned yet.


11/16/2006 Initial vendor notification
11/17/2006 Initial vendor response
01/05/2007 Coordinated public disclosure


The discoverer of this vulnerability wishes to remain anonymous.

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Copyright © 2006 Verisign, Inc.

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