Mozilla Firefox before 26.0 and SeaMonkey before 2.23 do not properly consider the sandbox attribute of an IFRAME element during processing of a contained OBJECT element, which allows remote attackers to bypass intended sandbox restrictions via a crafted web site.
https://security.gentoo.org/glsa/201504-01
https://bugzilla.mozilla.org/show_bug.cgi?id=886262
http://www.ubuntu.com/usn/USN-2052-1
http://www.securitytracker.com/id/1029476
http://www.securitytracker.com/id/1029470
http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
http://www.mozilla.org/security/announce/2013/mfsa2013-107.html
http://rhn.redhat.com/errata/RHSA-2013-1812.html
http://lists.opensuse.org/opensuse-updates/2014-01/msg00002.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00087.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00086.html
http://lists.opensuse.org/opensuse-updates/2013-12/msg00085.html
http://lists.opensuse.org/opensuse-security-announce/2013-12/msg00010.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124257.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/123437.html