USN-3140-1: Firefox vulnerabilities

30 November 2016

firefox vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 16.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS
  • Ubuntu 12.04 LTS


Firefox could be made to crash or run programs as your login if it opened a malicious website.

Software Description

  • firefox - Mozilla Open Source web browser


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)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.10
firefox - 50.0.2+build1-0ubuntu0.16.10.1
Ubuntu 16.04 LTS
firefox - 50.0.2+build1-0ubuntu0.16.04.1
Ubuntu 14.04 LTS
firefox - 50.0.2+build1-0ubuntu0.14.04.1
Ubuntu 12.04 LTS
firefox - 50.0.2+build1-0ubuntu0.12.04.1

To update your system, please follow these instructions:

After a standard system update you need to restart Firefox to make all the necessary changes.