Tag: driver

Bring Your Own Vulnerable Driver (BYOVD) is a well-known post-exploitation technique used by adversaries. This blog post is part of a series. In part one we saw how to abuse a vulnerable driver to gain access to Ring-0 capabilities. In this second and final part, we provide a technical explanation on how to perform reflective driver loading.

Bring Your Own Vulnerable Driver (BYOVD) is a well-known post-exploitation technique used by adversaries. This blog post is part of a series. We will see how to abuse a vulnerable driver to gain access to Ring-0 capabilities. In this first post we describe in detail the exploitation of vulnerabilities found in a signed Lenovo driver on Windows.

Broadcom is one of the major vendors of wireless devices worldwide. Since these chips are so widespread they constitute a high value target to attackers and any vulnerability found in them should be considered to pose high risk. In this blog post I provide an account of my internship at Quarkslab which included obtaining, reversing and fuzzing the firmware, and finding a few new vulnerabilities.