Firefox could be made to crash or run programs as your login if it opened a malicious website.
It was discovered that data: URLs can inherit the wrong origin after a HTTP redirect in some circumstances. An attacker could potentially exploit this to bypass same-origin restrictions. (CVE-2016-9078)
30 November 2016
A security issue affects these releases of Ubuntu and its derivatives:
Firefox could be made to crash or run programs as your login if it opened a malicious website.
It was discovered that data: URLs can inherit the wrong origin after a HTTP redirect in some circumstances. An attacker could potentially exploit this to bypass same-origin restrictions. (CVE-2016-9078)
A use-after-free was discovered in SVG animations. If a user were tricked in to opening a specially crafted website, an attacker could exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2016-9079)
The problem can be corrected by updating your system to the following package versions:
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart Firefox to make all the necessary changes.
Vulmon