Oracle VirtualBox crUnpackTexGendv Stack-based Buffer Overflow Privilege Escalation Vulnerability

2018-01-18T00:00:00
ID ZDI-18-120
Type zdi
Reporter Vasily Vasiliev
Modified 2018-01-18T00:00:00

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 crUnpackTexGendv method. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute code under the context of the hypervisor.