Ubuntu 18.04 LTS USN-3918-4 Critical: Firefox Performance Issue

ubuntu

April 16, 2019

USN-3918-1 caused a regression in Firefox.

Summary

USN-3918-1 caused a regression in Firefox.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

USN-3918-1 fixed vulnerabilities in Firefox. The update caused web

compatibility and performance issues with some websites. 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 via application

crash, denial of service via successive FTP authorization prompts or modal

alerts, trick the user with confusing permission request prompts, obtain

sensitive information, conduct social engineering attacks, or execute

arbitrary code. (CVE-2019-9788, CVE-2019-9789, CVE-2019-9790,

CVE-2019-9791, CVE-2019-9792, CVE-2019-9795, CVE-2019-9796, CVE-2019-9797,

CVE-2019-9799, CVE-2019-9802, CVE-2019-9805, CVE-2...

Read the Full Advisory

Topics Covered

security advisory critical issue firefox update instructions ubuntu performance issue regression fix

Update Instructions

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

Ubuntu 18.10:
  firefox                         66.0.3+build1-0ubuntu0.18.10.1

Ubuntu 18.04 LTS:
  firefox                         66.0.3+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  firefox                         66.0.3+build1-0ubuntu0.16.04.1

Ubuntu 14.04 LTS:
  firefox                         66.0.3+build1-0ubuntu0.14.04.1

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