Previous work has shown that a USB port left unattended may be subject to pwnage via insertion of a device that types into your command shell (e.g. here). Impressive attack payloads have been delivered over USB to jailbreak PS3 and a “smart TV“. Not surprisingly, USB stacks started incorporating defenses such as device registration, USB firewalls, and other protective kits. But do these protective measures go far enough to let you safely plug in a strange thumb drive into your laptop’s USB port? We demonstrate that the scope of the OS code manipulation feasible through a USB port is much broader than could be expected. USB stack abuse is not limited to emulating HID keyboards or a few exotic devices — it is a clear and present danger throughout the USB software stack and can reach into any part of the operating system kernel and driver code. We show a simple development environment that is capable of emulating any USB device to engage whatever software on the host computer is meant to interact with such devices — and break any and all of the assumptions made by such software, leading to pwnage. In a nutshell, sharing a USB port belongs in the past — just as the era of downloading arbitrary executables and other Internet “free love”.