USN-3516-1: Firefox vulnerabilities

5 January 2018

firefox vulnerabilities

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

  • Ubuntu 17.10
  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Firefox could be made to expose sensitive information.

Software Description

  • firefox - Mozilla Open Source web browser

Details

It was discovered that speculative execution performed by modern CPUs could leak information through a timing side-channel attack, and that this could be exploited in web browser JavaScript engines. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to obtain sensitive information from other domains, bypassing same-origin restrictions. (CVE-2017-5715, CVE-2017-5753, CVE-2017-5754).

Update instructions

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

Ubuntu 17.10
firefox - 57.0.4+build1-0ubuntu0.17.10.1
Ubuntu 17.04
firefox - 57.0.4+build1-0ubuntu0.17.04.1
Ubuntu 16.04 LTS
firefox - 57.0.4+build1-0ubuntu0.16.04.1
Ubuntu 14.04 LTS
firefox - 57.0.4+build1-0ubuntu0.14.04.1

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.

References