CVE-2011-2363

Vulnerabilidad de uso después de la liberación en la función nsSVGPointList::AppendElement en la implementación de listas de elementos SVG en Mozilla Firefox antes de v3.6.18, Thunderbird antes de v3.1.11 y Seamonkey hasta v2.0.14, permite a atacantes remotos producir una denegación de servicio (caída de aplicación) o posiblemente ejecutar código arbitrario mediante vectores que incluyen la llamada a user-supplied

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.
The specific flaw exists within the code responsible for parsing SVG polygon objects. The code within nsSVGPointList::AppendElement() does not account for user defined getter methods modifying or destroying the parent object during a repaint. An attacker can abuse this flaw to create a dangling pointer which is referenced during the traversal of the SVG container hierarchy. This can be leveraged to execute arbitrary code within the context of the browser.