Red Hat Security Advisory 2016-1996-01 – Red Hat CloudForms Management Engine delivers the insight, control, and automation needed to address the challenges of managing virtual environments. CloudForms Management Engine is built on Ruby on Rails, a model-view-controller framework for web application development. Action Pack implements the controller and the view components. An input validation flaw was found in the way CloudForms regular expressions were passed to the expression engine via the JSON API and the web-based UI. A user with the ability to view collections and filter them could use this flaw to execute arbitrary shell commands on the host with the privileges of the CloudForms process.