manifests/base.pp in the puppetlabs-cinder module, as used in PackStack, uses world-readable permissions for the (1) cinder.conf and (2) api-paste.ini configuration files, which allows local users to read OpenStack administrative passwords by reading the files.
https://github.com/puppetlabs/puppetlabs-cinder/commit/7da792fbd40c0e6eae1ee093aa00e0b177bd2ebc