Ubuntu 20.10 USN-4687-1 Critical: Firefox Denial Of Service Threat

ubuntu

January 7, 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 use-after-free was discovered in Firefox when handling SCTP packets.

An attacker could potentially exploit this to cause a denial of service,

or execute arbitrary code.

Topics Covered

security advisory denial of service critical issue critical firefox update instructions ubuntu website exploit

Update Instructions

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

Ubuntu 20.10:
  firefox                         84.0.2+build1-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  firefox                         84.0.2+build1-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         84.0.2+build1-0ubuntu0.18.04.1

Ubuntu 16.04 LTS:
  firefox                         84.0.2+build1-0ubuntu0.16.04.1

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