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.
The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.