http://www.itbusinessedge.com/blogs/top/?p=244

Virtualization is a broad term that refers to the use of fewer pieces of hardware to run more operating systems and applications. In practical terms, it is the hosting of more than one OS on a single physical machine. That description alone suggests the different, albeit related, reasons that CIOs and CFOs like virtualization.

There is a fly in the ointment of money savings and increased productivity, however. These environments are extremely vulnerable because security approaches haven’t caught up. This NewsFactor story looks at four of the top security concerns surrounding server virtualization. The first is the possibility that the system which oversees all the virtual machines — the hypervisor — could be hacked in such a way that it infects everything under its control.

Check out this article talking about virtualization in the enterprise, it’s an interesting read. Many companies have already started looking at virtualization or have implemented it as a way of consolidating or improving the way they provide there infrastructure. Does this leave the infrastructure at risk? As with anything your infrastructure is only as secure as you configure and maintain it. Applying the security hotfixes and service packs to the virtual machines as well as the applications running on them, is just as important as securing and patching the hypervisor, the ESX server, a good article, do check it out.