========================================================================== Ubuntu Security Notice USN-4423-1 July 14, 2020 firefox vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 19.10 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: A X-Frame-Options bypass was discovered in Firefox. Software Description: - firefox: Mozilla Open Source web browser Details: It was discovered that X-Frame-Options could be bypassed in some circumstances. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit this to conduct clickjacking attacks. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: firefox 78.0.2+build2-0ubuntu0.20.04.1 Ubuntu 19.10: firefox 78.0.2+build2-0ubuntu0.19.10.1 Ubuntu 18.04 LTS: firefox 78.0.2+build2-0ubuntu0.18.04.1 Ubuntu 16.04 LTS: firefox 78.0.2+build2-0ubuntu0.16.04.1 After a standard system update you need to restart Firefox to make all the necessary changes. References: https://usn.ubuntu.com/4423-1 https://launchpad.net/bugs/1887576 Package Information: https://launchpad.net/ubuntu/+source/firefox/78.0.2+build2-0ubuntu0.20.04.1 https://launchpad.net/ubuntu/+source/firefox/78.0.2+build2-0ubuntu0.19.10.1 https://launchpad.net/ubuntu/+source/firefox/78.0.2+build2-0ubuntu0.18.04.1 https://launchpad.net/ubuntu/+source/firefox/78.0.2+build2-0ubuntu0.16.04.1