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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --gSRrjRdadlnv2JCvuvbjP5bPgXUS8t42M Content-Type: multipart/mixed; boundary="CipaFDVl03bSXHd3wjb1HM8A1BQIVfQJh"; 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: <3868e7f4-a904-2c33-d023-22797775e327@canonical.com> Subject: [USN-3477-4] Firefox regression
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========================================================================== 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
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