Breaking Theoretical Limits: The Gap Between Virtual NICs and Physical Network Cards

...In this presentation, we will first focus on the netvsp.ko module from Hyper-V guest environment, detail its architecture and the mechanism of IP packet transmission. Then we will demonstrate how to send legal IP packets that break length limitations to Hyper-V from the guest environment. Furtherly, we will dive into the network modules of Hyper-V, and provide a comprehensive comparison of the IP packet process routines between virtual NICs and real network cards. Then we will share some vulnerabilities existing …

architecture breaking environment focus gap hyper-v legal length limitations mechanism network packet packets physical presentation send the mechanism transmission virtual