Cloudburst virtual machine escape is an exploit method that enables a guest-level virtual machine (VM) to attack its host. The method takes advantage of a flaw in VMware Workstation working in conjunction with Cloudburst, IBM's cloud service provisioning software for cloud providers.
In a virtual machine escape, an attacker runs code on a VM that allows an operating system running within it to break out and interact directly with the hypervisor. A VM escape gives the attacker access to the host operating system and all other virtual machines running on that host.
Research firm Kostya Kortchinsky Immunity Inc. developed the Cloudburst VM escape method.