Red Hat Security Advisory 2013-1794-01 - Ruby on Rails is a model-view-controller framework for web application development. Action Pack implements the controller and the view components. A flaw was found in the way Ruby on Rails performed JSON parameter parsing. An application using a third party library, which uses the Rack::Request interface, or custom Rack middleware could bypass the protection implemented to fix the CVE-2013-0155 vulnerability, causing the application to receive unsafe parameters and become vulnerable to CVE-2013-0155.
135a48c1e3f99b850c2d60c2cd13ef3f61d6a033ac26df2f0c0908db190de34a