Ubuntu 20.10 USN-4717-2 Critical: Firefox Regression Fix

ubuntu

February 8, 2021

USN-4717-1 introduced a regression in Firefox.

Summary

USN-4717-1 introduced a regression in Firefox.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

USN-4717-1 fixed vulnerabilities in Firefox. The update caused a

startup hang in some circumstances. This update fixes the problem.

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, obtain sensitive

information, conduct clickjacking attacks, or execute arbitrary code.

Topics Covered

security advisory denial of service security update security issue critical software update Ubuntu firefox regression fix

Update Instructions

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

Ubuntu 20.10:
  firefox                         85.0.1+build1-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  firefox                         85.0.1+build1-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         85.0.1+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  firefox                         85.0.1+build1-0ubuntu0.16.04.1

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