Security researcher Gustavo Grieco reported that on Linux Gnome systems the dialog for choosing local files uses the operating system's gdk-pixbuf library to render thumbnails for image file types. This library supports various image decoders, and Grieco reported that the Jasper and TGA decoders were unmaintained and have several known vulnerabilities. Firefox has disabled the use of those decoders in gdk-pixbuf. This issue only affects Linux systems running Gnome. Windows, OS X, and Android operating systems are unaffected. External Reference: https://www.mozilla.org/security/announce/2015/mfsa2015-143.html Acknowledgements: Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Gustavo Grieco as the original reporter. Statement: This issue does not affect the version of firefox and thunderbird as shipped with Red Hat Enterprise Linux 5, 6 and 7.
CVE-2015-7216 is for Jasper issues, with Jasper being used by gdk-pixbuf, and CVE-2015-7217 is for TGA issues in gdk-pixbuf. Issues were fixed in Firefox by disabling support for all image formats expect of few selected. https://hg.mozilla.org/mozilla-central/rev/83969f2fc719