1. Ubuntu Security Notices
  2. USN-4687-1

USN-4687-1: Firefox vulnerability

Publication date

8 January 2021

Overview

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

Releases

Packages

  • 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.

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.

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
20.10 groovy firefox –  84.0.2+build1-0ubuntu0.20.10.1
20.04 focal firefox –  84.0.2+build1-0ubuntu0.20.04.1
18.04 bionic firefox –  84.0.2+build1-0ubuntu0.18.04.1
16.04 xenial firefox –  84.0.2+build1-0ubuntu0.16.04.1

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References

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