{"id":"UBUNTU-CVE-2016-5284","details":"Mozilla Firefox before 49.0, Firefox ESR 45.x before 45.4, and Thunderbird \u003c 45.4 rely on unintended expiration dates for Preloaded Public Key Pinning, which allows man-in-the-middle attackers to spoof add-on updates by leveraging possession of an X.509 server certificate for addons.mozilla.org signed by an arbitrary built-in Certification Authority.","modified":"2026-02-04T03:45:56.084534Z","published":"2016-09-22T00:00:00Z","related":["USN-3076-1","USN-3112-1"],"upstream":["CVE-2016-5284"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-5284"},{"type":"REPORT","url":"https://www.mozilla.org/en-US/security/advisories/mfsa2016-85/"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3076-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3112-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-5284"}],"affected":[{"package":{"name":"firefox","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/firefox@49.0+build4-0ubuntu0.14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"49.0+build4-0ubuntu0.14.04.1"}]}],"versions":["24.0+build1-0ubuntu1","25.0+build3-0ubuntu0.13.10.1","28.0~b2+build1-0ubuntu2","28.0+build1-0ubuntu1","28.0+build2-0ubuntu1","28.0+build2-0ubuntu2","29.0+build1-0ubuntu0.14.04.2","30.0+build1-0ubuntu0.14.04.3","31.0+build1-0ubuntu0.14.04.1","32.0+build1-0ubuntu0.14.04.1","32.0.3+build1-0ubuntu0.14.04.1","33.0+build2-0ubuntu0.14.04.1","34.0+build2-0ubuntu0.14.04.1","35.0+build3-0ubuntu0.14.04.2","35.0.1+build1-0ubuntu0.14.04.1","36.0+build2-0ubuntu0.14.04.4","36.0.1+build2-0ubuntu0.14.04.1","36.0.4+build1-0ubuntu0.14.04.1","37.0+build2-0ubuntu0.14.04.1","37.0.1+build1-0ubuntu0.14.04.1","37.0.2+build1-0ubuntu0.14.04.1","38.0+build3-0ubuntu0.14.04.1","39.0+build5-0ubuntu0.14.04.1","39.0.3+build2-0ubuntu0.14.04.1","40.0+build4-0ubuntu0.14.04.1","40.0+build4-0ubuntu0.14.04.4","40.0.3+build1-0ubuntu0.14.04.1","41.0+build3-0ubuntu0.14.04.1","41.0.1+build2-0ubuntu0.14.04.1","41.0.2+build2-0ubuntu0.14.04.1","42.0+build2-0ubuntu0.14.04.1","43.0+build1-0ubuntu0.14.04.1","43.0.4+build3-0ubuntu0.14.04.1","44.0+build3-0ubuntu0.14.04.1","44.0.1+build2-0ubuntu0.14.04.1","44.0.2+build1-0ubuntu0.14.04.1","45.0+build2-0ubuntu0.14.04.1","45.0.1+build1-0ubuntu0.14.04.2","45.0.2+build1-0ubuntu0.14.04.1","46.0+build5-0ubuntu0.14.04.2","46.0.1+build1-0ubuntu0.14.04.3","47.0+build3-0ubuntu0.14.04.1","48.0+build2-0ubuntu0.14.04.1"],"ecosystem_specific":{"availability":"No 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