========================================================================== Ubuntu Security Notice USN-4978-1 June 02, 2021 firefox vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 21.04 - Ubuntu 20.10 - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS 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: Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, re-enable camera devices without an additional permission prompt, spoof the browser UI, or execute arbitrary code. (CVE-2021-29959, CVE-2021-29961, CVE-2021-29966, CVE-2021-29967) It was discovered that filenames printed from private browsing mode were incorrectly retained in preferences. A local attacker could potentially exploit this to obtain sensitive information. (CVE-2021-29960) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: firefox 89.0+build2-0ubuntu0.21.04.1 Ubuntu 20.10: firefox 89.0+build2-0ubuntu0.20.10.1 Ubuntu 20.04 LTS: firefox 89.0+build2-0ubuntu0.20.04.2 Ubuntu 18.04 LTS: firefox 89.0+build2-0ubuntu0.18.04.2 After a standard system update you need to restart Firefox to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-4978-1 CVE-2021-29959, CVE-2021-29960, CVE-2021-29961, CVE-2021-29966, CVE-2021-29967 Package Information: https://launchpad.net/ubuntu/+source/firefox/89.0+build2-0ubuntu0.21.04.1 https://launchpad.net/ubuntu/+source/firefox/89.0+build2-0ubuntu0.20.10.1 https://launchpad.net/ubuntu/+source/firefox/89.0+build2-0ubuntu0.20.04.2 https://launchpad.net/ubuntu/+source/firefox/89.0+build2-0ubuntu0.18.04.2