Mixed content blocking of insecure (HTTP) sub-resources in a secure (HTTPS) document was not correctly applied for resources that redirect from HTTPS to HTTP, allowing content that should be blocked, such as scripts, to be loaded on a page. This vulnerability affects Firefox < 57.
Bloqueo de contenido mixto de subrecursos no seguros (HTTP) en un documento seguro (HTTPS) no se ha aplicado correctamente para los recursos que se redirigen de HTTPS a HTTP, permitiendo que el contenido que se debería bloquear, como los scripts, se carguen en una página. Esta vulnerabilidad afecta a las versiones anteriores a la 57 de Firefox.
USN-3477-1 fixed vulnerabilities in Firefox. The update caused search suggestions to not be displayed when performing Google searches from the search bar. This update fixes the problem. Multiple security issues were discovered 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, read uninitialized memory, obtain sensitive information, bypass same-origin restrictions, bypass CSP protections, bypass mixed content blocking, spoof the addressbar, or execute arbitrary code. It was discovered that javascript: URLs pasted in to the addressbar would be executed instead of being blocked in some circumstances. If a user were tricked in to copying a specially crafted URL in to the addressbar, an attacker could potentially exploit this to conduct cross-site scripting attacks. It was discovered that exported bookmarks do not strip script elements from user-supplied tags. If a user were tricked in to adding specially crafted tags to bookmarks, exporting them and then opening the resulting HTML file, an attacker could potentially exploit this to conduct cross-site scripting attacks. Various other issues were also addressed.
