CVE-2014-1581

Vulnerabilidad de uso después de liberación en DirectionalityUtils.cpp en Mozilla Firefox anterior a 33.0, Firefox ESR 31.x anterior a 31.2, y Thunderbird 31.x anterior a 31.2 permite a atacantes remotos ejecutar código arbitrario a través de texto que se maneja indebidamente durante la interacción entre la resolución de direccionalidad y diseño.

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 handling of bi-directional unicode text. The issue lies in the failure to properly handle text that has its bi-directional character type changed. An attacker can leverage this vulnerability to execute code under the context of the current process.

Bobby Holley, Christian Holler, David Bolter, Byron Campen, Jon Coppeard, Carsten Book, Martijn Wargers, Shih-Chiang Chien, Terrence Cole and Jeff Walden discovered multiple memory safety issues in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service via application crash, or execute arbitrary code with the privileges of the user invoking Firefox. Atte Kettunen discovered a buffer overflow during CSS manipulation. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to cause a denial of service via application crash or execute arbitrary code with the privileges of the user invoking Firefox. Various other issues were also addressed.