The nsCSPContext::SendReports function in dom/security/nsCSPContext.cpp in Mozilla Firefox before 45.0 and Firefox ESR 38.x before 38.7 does not prevent use of a non-HTTP report-uri for a Content Security Policy (CSP) violation report, which allows remote attackers to cause a denial of service (data overwrite) or possibly gain privileges by specifying a URL of a local file.
https://security.gentoo.org/glsa/201605-06
https://bugzilla.mozilla.org/show_bug.cgi?id=1243178
http://www.ubuntu.com/usn/USN-2934-1
http://www.ubuntu.com/usn/USN-2917-3
http://www.ubuntu.com/usn/USN-2917-2
http://www.ubuntu.com/usn/USN-2917-1
http://www.securitytracker.com/id/1035215
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
http://www.mozilla.org/security/announce/2016/mfsa2016-17.html
http://www.debian.org/security/2016/dsa-3520
http://www.debian.org/security/2016/dsa-3510
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00008.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00093.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00091.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00089.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00068.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00050.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00031.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00029.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00027.html
http://hg.mozilla.org/releases/mozilla-release/rev/5154bb929236