The deployment script in the unsupported "OpenShift Extras" set of add-on scripts, in Red Hat Openshift 1, installs a default public key in the root user's authorized_keys file.
https://www.openwall.com/lists/oss-security/2014/06/05/19
https://github.com/openshift/openshift-extras/blob/enterprise-2.0/README.md#security-notice