USN-3238-1: Firefox vulnerability

20 March 2017

firefox vulnerability

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


An integer overflow was discovered in Firefox.

Software Description

  • firefox - Mozilla Open Source web browser


An integer overflow was discovered in Firefox. 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-2017-5428)

Update instructions

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

Ubuntu 16.10
firefox - 52.0.1+build2-0ubuntu0.16.10.1
Ubuntu 16.04 LTS
firefox - 52.0.1+build2-0ubuntu0.16.04.1
Ubuntu 14.04 LTS
firefox - 52.0.1+build2-0ubuntu0.14.04.1
Ubuntu 12.04 LTS
firefox - 52.0.1+build2-0ubuntu0.12.04.1

To update your system, please follow these instructions:

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