Ubuntu 21.04 USN-4942-1 Critical: Firefox Crash Exploit Risk

ubuntu

May 10, 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:

A race condition was discovered in Web Render Components. If a user were

tricked into opening a specially crafted website, an attacker could

potentially exploit this to execute arbitrary code.

Topics Covered

security advisory critical remote code execution threat Ubuntu race condition firefox ubuntu exploit risk web browser issue

Update Instructions

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

Ubuntu 21.04:
  firefox                         88.0.1+build1-0ubuntu0.21.04.2

Ubuntu 20.10:
  firefox                         88.0.1+build1-0ubuntu0.20.10.2

Ubuntu 20.04 LTS:
  firefox                         88.0.1+build1-0ubuntu0.20.04.2

Ubuntu 18.04 LTS:
  firefox                         88.0.1+build1-0ubuntu0.18.04.2

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