Ubuntu 21.04: USN-5037-1 High: Firefox Crash and Code Execution Risk

ubuntu

August 11, 2021

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:

Multiple security issues were discovered in Firefox. If a user were

tricked into opening a specially crafted website, an attacker could

potentially exploit these to cause a denial of service, obtain sensitive

information, trick a user into accepting unwanted permissions, or execute

arbitrary code.

Topics Covered

security advisory denial of service high severity code execution Ubuntu firefox web browser

Update Instructions

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

Ubuntu 21.04:
  firefox                         91.0+build2-0ubuntu0.21.04.1

Ubuntu 20.04 LTS:
  firefox                         91.0+build2-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         91.0+build2-0ubuntu0.18.04.1

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