Mozilla Firefox before 48.0 does not properly restrict drag-and-drop (aka dataTransfer) actions for file: URIs, which allows user-assisted remote attackers to access local files via a crafted web site.
Mozilla Firefox en versiones anteriores a 48.0 no restringe adecuadamente acciones arrastrar y soltar (también conocido como dataTransfer) para file: URIs, lo que permite a atacantes remotos asistidos por usuario acceder a archivos locales a través de un sitio web manipulado.
Gustavo Grieco discovered an out-of-bounds read during XML parsing in some circumstances. 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 obtain sensitive information. Toni Huttunen discovered that once a favicon is requested from a site, the remote server can keep the network connection open even after the page is closed. A remote attacker could potentially exploit this to track users, resulting in information disclosure. Various other issues were also addressed.
