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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.1920 USN-4978-1: Firefox vulnerabilities 3 June 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Firefox Publisher: Ubuntu Operating System: Ubuntu Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Denial of Service -- Remote with User Interaction Provide Misleading Information -- Remote with User Interaction Access Confidential Data -- Remote with User Interaction Unauthorised Access -- Remote with User Interaction Reduced Security -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2021-29967 CVE-2021-29966 CVE-2021-29961 CVE-2021-29960 CVE-2021-29959 Reference: ESB-2021.1897 ESB-2021.1896 Original Bulletin: https://ubuntu.com/security/notices/USN-4978-1 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-4978-1: Firefox vulnerabilities 02 June 2021 Firefox could be made to crash or run programs as your login if it opened a malicious website. Releases o Ubuntu 21.04 o Ubuntu 20.10 o Ubuntu 20.04 LTS o Ubuntu 18.04 LTS Packages o 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 o firefox - 89.0+build2-0ubuntu0.21.04.1 Ubuntu 20.10 o firefox - 89.0+build2-0ubuntu0.20.10.1 Ubuntu 20.04 o firefox - 89.0+build2-0ubuntu0.20.04.2 Ubuntu 18.04 o 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 o CVE-2021-29960 o CVE-2021-29959 o CVE-2021-29961 o CVE-2021-29966 o CVE-2021-29967 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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