This bug was fixed in the package libav - 6:9.20-0ubuntu0.14.04.1 --------------- libav (6:9.20-0ubuntu0.14.04.1) trusty-security; urgency=medium
* SECURITY UPDATE: Updated to 9.20 to fix various crashes with invalid-free, corrupted double-linked list or out-of-bounds read (LP: #1643467) - No CVE number -- Marc Deslauriers <marc.deslauri...@ubuntu.com> Wed, 07 Dec 2016 15:36:50 -0500 ** Changed in: libav (Ubuntu Trusty) Status: Confirmed => Fix Released -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to libav in Ubuntu. https://bugs.launchpad.net/bugs/1643467 Title: Firefox 50 blocks Ubuntu 12.04 and 14.04 LTS's version of libavcodec Status in libav: Unknown Status in firefox package in Ubuntu: Confirmed Status in libav package in Ubuntu: Invalid Status in firefox source package in Precise: New Status in libav source package in Precise: Confirmed Status in firefox source package in Trusty: New Status in libav source package in Trusty: Fix Released Bug description: Whenever it tries to play a video, Firefox 50 displays this message at the top of every page: "libavcodec may be vulnerable or is not supported, and should be updated to play video" https://dxr.mozilla.org/mozilla-central/source/browser/locales/en- US/chrome/browser/browser.properties?q=%22libavcodec+may+be+vulnerable%22&redirect_type=single#742 Firefox refuses any libavcodec version prior to 54.35.1 (unless media.libavcodec.allow-obsolete==true). https://dxr.mozilla.org/mozilla- central/source/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp#60 Users should not be subjected to this warning, as it is vague (does not instruct them how to fix it). Ubuntu 14.04 LTS should ship with an updated version of libavcodec. DistroRelease: Ubuntu 14.04 Package: firefox 50.0+build2-0ubuntu0.14.04.2 To manage notifications about this bug go to: https://bugs.launchpad.net/libav/+bug/1643467/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp