Format string vulnerability in VMware Workstation 4.5.2 build-8848, if running with elevated privileges, might allow local users to execute arbitrary code via format string specifiers in command line arguments. NOTE: it is not clear if there are any default or typical circumstances under which VMware would be running with privileges beyond those already available to the attackers, so this might not be a vulnerability.
VMware GSX Server 2.5.1 build 4968 and earlier, and Workstation 4.0 and earlier, allows local users to gain root privileges via certain enivronment variables that are used when launching a virtual machine session.