hostd-vmdb in VMware ESXi 4.0 through 5.0 and ESX 4.0 through 4.1 allows remote attackers to cause a denial of service (hostd-vmdb service outage) by modifying management traffic.
https://exchange.xforce.ibmcloud.com/vulnerabilities/88135
http://www.vmware.com/security/advisories/VMSA-2013-0012.html
http://www.securitytracker.com/id/1029206