Mozilla Firefox before 48.0 does not properly set the LINKABLE and URI_SAFE_FOR_UNTRUSTED_CONTENT flags of about: URLs that are used for error pages, which makes it easier for remote attackers to conduct spoofing attacks via a crafted URL, as demonstrated by misleading text after an about:neterror?d= substring.
Mozilla Firefox en versiones anteriores a 48.0 no fija adecuadamente los indicadores LINKABLE y URI_SAFE_FOR_UNTRUSTED_CONTENT de about: URLs que se usan para páginas de error, lo que facilita a atacantes remotos llevar a cabo ataques de suplantación a través de una URL manipuladas, según lo demostrado induciendo a error texto después de un about:neterror?d= substring.
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.
