tools/sample_data.sh in OpenStack Keystone 2012.1.3, when access to Amazon Elastic Compute Cloud (Amazon EC2) is configured, uses world-readable permissions for /etc/keystone/ec2rc, which allows local users to obtain access to EC2 services by reading administrative access and secret values from this file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/80612
https://bugzilla.redhat.com/show_bug.cgi?id=873447
http://www.securityfocus.com/bid/56888
http://rhn.redhat.com/errata/RHSA-2012-1556.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-December/094286.html