========================================================================== Ubuntu Security Notice USN-3435-1 October 02, 2017
firefox vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 17.04 - Ubuntu 16.04 LTS - Ubuntu 14.04 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 in to opening a specially crafted website, an attacker could potentially exploit these to read uninitialized memory, obtain sensitive information, bypass phishing and malware protection, spoof the origin in modal dialogs, conduct cross-site scripting (XSS) attacks, cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7793, CVE-2017-7810, CVE-2017-7811, CVE-2017-7812, CVE-2017-7813, CVE-2017-7814, CVE-2017-7815, CVE-2017-7818, CVE-2017-7819, CVE-2017-7820, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824) Martin Thomson discovered that NSS incorrectly generated handshake hashes. A remote attacker could potentially exploit this to cause a denial of service via application crash, or execute arbitrary code. (CVE-2017-7805) Multiple security issues were discovered in WebExtensions. If a user were tricked in to installing a specially crafted extension, an attacker could potentially exploit these to download and open non-executable files without interaction, or obtain elevated privileges. (CVE-2017-7816, CVE-2017-7821) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: firefox 56.0+build6-0ubuntu0.17.04.1 Ubuntu 16.04 LTS: firefox 56.0+build6-0ubuntu0.16.04.1 Ubuntu 14.04 LTS: firefox 56.0+build6-0ubuntu0.14.04.1 After a standard system update you need to restart Firefox to make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3435-1 CVE-2017-7793, CVE-2017-7805, CVE-2017-7810, CVE-2017-7811, CVE-2017-7812, CVE-2017-7813, CVE-2017-7814, CVE-2017-7815, CVE-2017-7816, CVE-2017-7818, CVE-2017-7819, CVE-2017-7820, CVE-2017-7821, CVE-2017-7822, CVE-2017-7823, CVE-2017-7824 Package Information: https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.17.04.1 https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.16.04.1 https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.14.04.1
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