The virtual machine isn't guaranteed to work: http://www.zdnet.co.uk/news/security-threats/2009/06/09/virt...
Unless you know exactly what it can do, you should probably run it on an old machine without [direct] internet access.
Unless you know exactly what it can do, you should probably run it on an old machine without [direct] internet access.
Cloudburst uses a vulnerability in the virtual-machine display functions of VMware Workstation that can be exploited by a specially crafted video file.
and...
However, the Cloudburst exploit currently has certain limitations: it will only succeed on Workstation 6.5.0 or 6.5.1 or the associated Player versions. In addition, the guest and host must be Windows-based, among other requirements, Immunity said in its release notes.
Assume that if that's been publicly released, more advanced stuff has already been seen in the wild.