USN-3801-2: Firefox regressions

23 November 2018

firefox regressions

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

  • Ubuntu 18.10
  • Ubuntu 18.04 LTS
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

USN-3801-1 caused some minor regressions in Firefox.

Software Description

  • firefox - Mozilla Open Source web browser

Details

USN-3801-1 fixed vulnerabilities in Firefox. The update introduced various minor regressions. This update fixes the problems.

We apologize for the inconvenience.

Original advisory details:

Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, bypass CSP restrictions, spoof the protocol registration notification bar, leak SameSite cookies, bypass mixed content warnings, or execute arbitrary code. (CVE-2018-12388, CVE-2018-12390, CVE-2018-12392, CVE-2018-12393, CVE-2018-12398, CVE-2018-12399, CVE-2018-12401, CVE-2018-12402, CVE-2018-12403)

Multiple security issues were discovered with WebExtensions in Firefox. If a user were tricked in to installing a specially crafted extension, an attacker could potentially exploit these to bypass domain restrictions, gain additional privileges, or run content scripts in local pages without permission. (CVE-2018-12395, CVE-2018-12396, CVE-2018-12397)

Update instructions

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

Ubuntu 18.10
firefox - 63.0.3+build1-0ubuntu0.18.10.1
Ubuntu 18.04 LTS
firefox - 63.0.3+build1-0ubuntu0.18.04.1
Ubuntu 16.04 LTS
firefox - 63.0.3+build1-0ubuntu0.16.04.1
Ubuntu 14.04 LTS
firefox - 63.0.3+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