Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.2 and 4.x before 4.1.14.2 allows remote attackers to read arbitrary files by leveraging an application's unrestricted use of the render method and providing a .. (dot dot) in a pathname. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-0752.
https://groups.google.com/forum/message/raw?msg=rubyonrails-security/ddY6HgqB2z4/we0RasMZIAAJ
http://www.securitytracker.com/id/1035122
http://www.securityfocus.com/bid/83726
http://www.debian.org/security/2016/dsa-3509
http://weblog.rubyonrails.org/2016/2/29/Rails-4-2-5-2-4-1-14-2-3-2-22-2-have-been-released/
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00006.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00083.html
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00080.html