Active Model in Ruby on Rails 4.1.x before 4.1.14.1, 4.2.x...

Vulnerability Description

Active Model in Ruby on Rails 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 supports the use of instance-level writers for class accessors, which allows remote attackers to bypass intended validation steps via crafted parameters.

References

• http://www.openwall.com/lists/oss-security/2016/01/25/14
• https://groups.google.com/forum/message/raw?msg=ruby-security-ann/6jQVC1geukQ/3Iy0GU1ZEgAJ
• http://lists.opensuse.org/opensuse-updates/2016-02/msg00043.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178043.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178041.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178065.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html
• http://www.securitytracker.com/id/1034816
• http://www.debian.org/security/2016/dsa-3464
• http://rhn.redhat.com/errata/RHSA-2016-0296.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178066.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178047.html
• http://www.securityfocus.com/bid/82247