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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --n1En47FDppoNB4Vugek1vp5acvPV9sr86 Content-Type: multipart/mixed; boundary="GLAfVK41lSTG3BvL7MU9QDBhNbrMSabUI"; protected-headers="v1" From: Chris Coulson <chris.coulson@canonical.com> Reply-To: Ubuntu Security <security@ubuntu.com> To: ubuntu-security-announce@lists.ubuntu.com Message-ID: <6d6f033f-1aa2-7dca-8ff5-e6f5d13734c0@canonical.com> Subject: [USN-3435-2] Firefox regression
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========================================================================== Ubuntu Security Notice USN-3435-2 October 04, 2017
firefox regression ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 17.04 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS
Summary:
USN-3435-1 caused a regression in Firefox.
Software Description: - firefox: Mozilla Open Source web browser
Details:
USN-3435-1 fixed vulnerabilities in Firefox. The update caused the Flash plugin to crash in some circumstances. 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 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+build6-0ubuntu0.17.04.2
Ubuntu 16.04 LTS: firefox 56.0+build6-0ubuntu0.16.04.2
Ubuntu 14.04 LTS: firefox 56.0+build6-0ubuntu0.14.04.2
After a standard system update you need to restart Firefox to make all the necessary changes.
References: https://www.ubuntu.com/usn/usn-3435-2 https://www.ubuntu.com/usn/usn-3435-1 https://launchpad.net/bugs/1720908
Package Information: https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.17.04.2 https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.16.04.2 https://launchpad.net/ubuntu/+source/firefox/56.0+build6-0ubuntu0.14.04.2
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