CVE-2010-1785

WebKit de Apple Safari en versiones anteriores a la v5.0.1 en Mac OS X v10.5 hasta v10.6 y Windows, y anteriores a la v4.1.1 en Mac OS X v10.4, accede a memoria sin inicializar durante el procesamiento de los pseudo-elementos (1) :first-letter y (2) :first-line en un elemento de texto SVG, lo que permite a atacantes remotos ejecutar código de su elección o provocar una denegación de servicio (caída de la aplicación) a través de documento modificado.

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple Safari's Webkit. 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 library's implementation of the first-letter style in the context of an SVG text element. Upon applying the style to this element, the library will calculate the height for determining the overflow for an inline box. While traversing the elements for the height, the library will utilize data from a non-existent linebox. Successful exploitation will lead to code execution under the context of the application.