Race condition in the Mozilla Maintenance Service in Mozilla Firefox before 40.0 and Firefox ESR 38.x before 38.2 on Windows allows local users to write to arbitrary files and consequently gain privileges via vectors involving a hard link to a log file during an update.
lists.opensuse.org/opensuse-security-announce/2015-08/msg00014.html
lists.opensuse.org/opensuse-security-announce/2015-08/msg00015.html
lists.opensuse.org/opensuse-updates/2015-08/msg00030.html
lists.opensuse.org/opensuse-updates/2015-08/msg00031.html
www.mozilla.org/security/announce/2015/mfsa2015-84.html
www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
www.securitytracker.com/id/1033247
www.securitytracker.com/id/1033372
bugzilla.mozilla.org/show_bug.cgi?id=1171518
security.gentoo.org/glsa/201605-06
www.exploit-db.com/exploits/37925/