Ouroboros - Tearing Xen Hypervisor With the Snake

Explore a critical vulnerability in the Xen hypervisor through this Black Hat conference talk. Delve into the Xen Project's virtualization platform, which powers major cloud infrastructures. Learn about the hypervisor's role in managing CPU/MMU and guest operating systems, including the differences between PV and HVM modes. Discover how the speaker's team uncovered a verification bypass bug inspired by the Ouroboros symbol. Understand the potential impact of this vulnerability, which could allow a malicious PV guest OS to gain control over the hypervisor and other guest operating systems. Gain insights into specific exploitation vectors and payloads used to exploit this security flaw in one of the most widely used virtualization platforms.