Oracle VirtualBox crServerDispatchMessage Out-Of-Bounds Write Privilege Escalation Vulnerability

ID ZDI-18-685
Type zdi
Reporter Niklas Baumstark
Modified 2018-06-22T00:00:00


This vulnerability allows local attackers to execute arbitrary code on vulnerable installations of Oracle VirtualBox. An attacker must first obtain the ability to execute low-privileged code on the target guest system in order to exploit this vulnerability. The specific flaw exists within the crServerDispatchMessage method. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to escalate privileges and execute code under the context of the hypervisor.