Please be aware that VMware has issued several security advisories and patches to address vulnerabilities in VMware vCSA and ESXi.
JMX RMI Vulnerability:
We strongly encourage you to apply the latest patches to the VMware vCSA and ESXi hosts on your NETLAB+ system.
Please see VMware Security Advisory VMSA-2015-0007 for additional details on this vulnerability and which patches are required:
Provided below are two VMware KB articles on how to successfully patch an ESXi host and vCSA respectively:
SSH Vulnerability in ESXi:
SSH is disabled on ESXi hosts by default. If you have enabled SSH on ESXi hosts, please consider disabling it — it is not required by NETLAB+. This will help mitigate security vulnerabilities that may arise from older OpenSSH versions. For example, a new vulnerability has been found (CVE-2015-5600) that impacts OpenSSH through version 6.9. More info on this can be found in the link below: