CVE-2013-1690

Mozilla Firefox anterior a 22.0, Firefox ESR 17.x anterior a 17.0.7, Thunderbird anterior a 17.0.7, y Thunderbird ESR 17.x anterior a 17.0.7 no manejan adecuadamente los eventos "onreadystatechange" en conjunción con las recargas de página, lo que permite a atacantes remotos provocar una denegación de servicio (caída de aplicación) o posiblemente la ejecución arbitraria de código a través de un sitio web manipulado que provoca un intento de ejecución de datos y una asignación de memoria sin mapear.

Mozilla developers identified and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code. Security researcher Abhishek Arya of the Google Chrome Security Team used the Address Sanitizer tool to discover a series of use-after-free problems rated critical as security issues in shipped software. Some of these issues are potentially exploitable, allowing for remote code execution. We would also like to thank Abhishek for reporting additional use-after-free and buffer overflow flaws in code introduced during Firefox development. These were fixed before general release. Various other security issues were also addressed. The mozilla firefox packages have been upgraded to the latest ESR version which is unaffected by these security flaws.

Mozilla Firefox and Thunderbird do not properly handle onreadystatechange events in conjunction with page reloading, which allows remote attackers to cause a denial-of-service (DoS) or possibly execute malicious code via a crafted web site.