We have reported these vulnerabilities to the vendor (see our full disclosure timeline at the end of this post).įirmware backdoors are difficult to detect because they execute in the early stages of the boot process and they can persist across operating system (OS) re-installations:įigure 1: Attack Flow Chart to Install a UEFI Backdoor These vulnerabilities allow an attacker to elevate privileges, execute arbitrary code in System Management Mode (SMM), and install a backdoor at the firmware level. Today at BlackHat Asia 2017, we are disclosing two vulnerabilities in two different models of the GIGABYTE BRIX platform: Physical access requirements are a thing of the past these low-level implants can be installed remotely by exploiting vulnerabilities in the underlying UEFI system. The HackingTeam, Snowden, Shadow Brokers, and Vault7 leaks have revealed that UEFI/BIOS implants aren't just a theoretical concept, but have actually been weaponized by nation states to conduct cyber-espionage. Earlier this month, we teased a proof of concept for UEFI ransomware, which was presented at RSA Conference 2017.
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