Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 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.
https://www.exploit-db.com/exploits/40561/
https://groups.google.com/forum/message/raw?msg=ruby-security-ann/335P1DcLG00/JXcBnTtZEgAJ
http://www.securitytracker.com/id/1034816
http://www.securityfocus.com/bid/81801
http://www.openwall.com/lists/oss-security/2016/01/25/13
http://www.debian.org/security/2016/dsa-3464
http://rhn.redhat.com/errata/RHSA-2016-0296.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00043.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00034.html
http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178069.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178044.html