USN-3552-1: Firefox vulnerability

Ubuntu Security Notice USN-3552-1

31st January, 2018

firefox vulnerability

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

  • Ubuntu 17.10
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS


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

Software description

  • firefox - Mozilla Open Source web browser


Johann Hofmann discovered that HTML fragments created for
chrome-privileged documents were not properly sanitized. An attacker
could exploit this to execute arbitrary code. (CVE-2018-5124)

Update instructions

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

Ubuntu 17.10:
firefox 58.0.1+build1-0ubuntu0.17.10.1
Ubuntu 16.04 LTS:
firefox 58.0.1+build1-0ubuntu0.16.04.1
Ubuntu 14.04 LTS:
firefox 58.0.1+build1-0ubuntu0.14.04.1

To update your system, please follow these instructions:

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