Ubuntu: 4625-1 Moderate: Firefox Crash And Code Execution Threat

ubuntu

November 10, 2020

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

Summary

Firefox could be made to crash or run programs as your login if it

opened a malicious website.

Software Description:

- firefox: Mozilla Open Source web browser

Details:

A use-after-free was discovered in Firefox. If a user were tricked in

to opening a specially crafted website, an attacker could exploit this

to execute arbitrary code.

Topics Covered

security advisory firefox arbitrary code web browser ubuntu use-after-free user exploit

Update Instructions

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

Ubuntu 20.10:
  firefox                         82.0.3+build1-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  firefox                         82.0.3+build1-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         82.0.3+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  firefox                         82.0.3+build1-0ubuntu0.16.04.1

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