Possible Duplicates:
Can virtual machines infect their host?
Virtual Machine and Virus
Is the host OS isolated in terms of security? If I don't secure my VM could my Host OS be at risk? If it is secure then running windows in a VM on Linux may be the safest way to run Windows!
Asked by Shogun on October 22, 2010.
In theory it is possible if there is a vulnerability in the virtual machine. In practice, there's no need to worry as long as you keep the networking locked down -- don't let the guest have access to your internal network except the specific route needed to get to the internet.
Answered by Daenyth on October 22, 2010.
Yes, it has been demonstrated. See also this answer. Although I'd agree that it is not very common yet.
Answered by knitti on October 22, 2010.
Content from Superuser of Stack Exchange. Original article at Superuser.
Vitalization is very much like sandboxing, it keeps the guest file system completely separate from the host, however, if you set it up as if they are peers on a network with any sharing privileges, then one can be infected by the other as if they were both normal machines on a network. - MaQleod on October 22, 2010
so if I have a shared folder setup between the guest and host, that could be a potential target? - Shogun on October 22, 2010
@Shogun: Unlikely but possible - Daenyth on October 22, 2010