CVE-2015-4492

Vulnerabilidad de uso después de liberación en la memoria en la implementación de XMLHttpRequest::Open en Mozilla Firefox en versiones anteriores a 40.0 y Firefox ESR 38.x en versiones anteriores a 38.2, podría permitir a atacantes remotos ejecutar código arbitrario a través de un objeto SharedWorker que realiza llamadas recursivas al método open de un objeto XMLHttpRequest.

USN-2702-1 fixed vulnerabilities in Firefox. This update provides the corresponding updates for Ubufox. Gary Kwong, Christian Holler, Byron Campen, Tyson Smith, Bobby Holley, Chris Coulson, and Eric Rahm 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. Aki Helin discovered an out-of-bounds read when playing malformed MP3 content in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to obtain sensitive information, 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.