Oracle VirtualBox crServerDispatchReadPixels Integer Overflow Privilege Escalation Vulnerability

2019-01-17T00:00:00
ID ZDI-19-049
Type zdi
Reporter Jason Matthyser (pleasew8t) of MWR Labs
Modified 2019-06-22T00:00:00

Description

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 crServerDispatchReadPixels method. The issue results from the lack of proper validation of user-supplied data, which can result in an integer overflow before allocating a buffer. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the hypervisor.