(Pwn2Own) Microsoft Windows TdxCreateTransportAddress Buffer Overflow Privilege Escalation Vulnerability

2017-06-13T00:00:00
ID ZDI-17-400
Type zdi
Reporter pgboy and zhong_sf of Qihoo 360Vulcan Team
Modified 2017-06-14T00:00:00

Description

This vulnerability allows local attackers to escalate privileges on vulnerable installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the tdx.sys networking driver. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a buffer. An attacker can leverage this vulnerability to escalate privilege to the level of SYSTEM.