Ubuntu Security Notice USN-5434-1
May 23, 2022

firefox vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS


Firefox could be made to execute JavaScript in a privileged context if it
opened a malicious website.

Software Description:
- firefox: Mozilla Open Source web browser


It was discovered that the methods of an Array object could be corrupted
as a result of prototype pollution by sending a message to the parent
process. If a user were tricked into opening a specially crafted website,
an attacker could exploit this to execute JavaScript in a privileged

Update instructions:

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

Ubuntu 21.10:
  firefox                         100.0.2+build1-0ubuntu0.21.10.1

Ubuntu 20.04 LTS:
  firefox                         100.0.2+build1-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  firefox                         100.0.2+build1-0ubuntu0.18.04.1

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

  CVE-2022-1529, CVE-2022-1802

Package Information: