VMware vCenter Server 4.1 before Update 3 and 5.0 before Update 2, and vCSA 5.0 before Update 2, allows remote attackers to cause a denial of service (disk consumption) via vectors that trigger large log entries.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2012-6181
http://www.vmware.com/security/advisories/VMSA-2012-0018.html