The company has published a white paper discussing the VMware vulnerabilities, as well as working exploits that can compromise Windows or Ubuntu hosts; the paper and exploits, however, are available only to Canvas Early Updates customers.

VMware issued a last Friday acknowledging the bug, and provided links to new versions of its products that patched the problem. Fusion 2.0.4, a 186MB file, can be from VMware's site by current users of the company's Mac virtualization software.

Fusion, and its primary commercial competitor, Parallels Desktop, are used on a large number of Macs by users, most of whom want a virtual environment to run Windows and select applications available only for Microsoft's OS. Sales of Fusion and Parallels were over the same month the year before, market research company NPD Group said then.