=========================================================================== Ubuntu Security Notice USN-3477-4 January 03, 2018 firefox regression =========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 17.10 - Ubuntu 17.04 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: USN-3477-1 caused a regression in Firefox. Software Description: - firefox: Mozilla Open Source web browser Details: USN-3477-1 fixed vulnerabilities in Firefox. The update introduced a crash reporting issue where background tab crash reports were sent to Mozilla without user opt-in. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Multiple security issues were discovered in Firefox. If a user were tricked in to opening a specially crafted website, an attacker could potentially exploit these to cause a denial of service, read uninitialized memory, obtain sensitive information, bypass same-origin restrictions, bypass CSP protections, bypass mixed content blocking, spoof the addressbar, or execute arbitrary code. (CVE-2017-7826, CVE-2017-7827, CVE-2017-7828, CVE-2017-7830, CVE-2017-7831, CVE-2017-7832, CVE-2017-7833, CVE-2017-7834, CVE-2017-7835, CVE-2017-7837, CVE-2017-7838, CVE-2017-7842) It was discovered that javascript: URLs pasted in to the addressbar would be executed instead of being blocked in some circumstances. If a user were tricked in to copying a specially crafted URL in to the addressbar, an attacker could potentially exploit this to conduct cross-site scripting (XSS) attacks. (CVE-2017-7839) It was discovered that exported bookmarks do not strip script elements from user-supplied tags. If a user were tricked in to adding specially crafted tags to bookmarks, exporting them and then opening the resulting HTML file, an attacker could potentially exploit this to conduct cross-site scripting (XSS) attacks. (CVE-2017-7840) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.10: firefox 57.0.3+build1-0ubuntu0.17.10.1 Ubuntu 17.04: firefox 57.0.3+build1-0ubuntu0.17.04.1 Ubuntu 16.04 LTS: firefox 57.0.3+build1-0ubuntu0.16.04.1 Ubuntu 14.04 LTS: firefox 57.0.3+build1-0ubuntu0.14.04.1 After a standard system update you need to restart Firefox to make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3477-4 https://www.ubuntu.com/usn/usn-3477-1 https://launchpad.net/bugs/1741048 Package Information: https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.17.10.1 https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.17.04.1 https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.16.04.1 https://launchpad.net/ubuntu/+source/firefox/57.0.3+build1-0ubuntu0.14.04.1 --CipaFDVl03bSXHd3wjb1HM8A1BQIVfQJh--