VMware ESXi 4.0 through 5.5 and ESX 4.0 and 4.1 allow local users to read or modify arbitrary files by leveraging the Virtual Machine Power User or Resource Pool Administrator role for a vCenter Server Add Existing Disk action with a (1) -flat, (2) -rdm, or (3) -rdmp filename.
https://exchange.xforce.ibmcloud.com/vulnerabilities/89938
http://www.vmware.com/security/advisories/VMSA-2013-0016.html
http://www.securitytracker.com/id/1029529
http://www.securityfocus.com/bid/64491
http://www.securityfocus.com/archive/1/530482/100/0/threaded