UEFI shell vulnerabilities allow attackers to bypass Secure Boot One of our fears, as individuals who have spent years examining firmware security, is stumbling upon a vulnerability that reveals the fundamental flaws in our trust models. Recently, that fear became a reality when we conducted deeper research into signed UEFI shells and discovered what can only be described as signed backdoors on 200k laptops and desktops. UEFI vulnerabilities like this can raise the specter of BlackLotus and Boot...