Introduction Last week, I came across a piece of firmware that I was particularly curious about. As with typical analysis on such an image, I extracted the squashfs root using binwalk and found the web service, httpd, that I was targeting. A smile spread across my face as I typed a command into the terminal to run httpd in QEMU user mode, but after pressing the “Enter” key, I saw it:...
Introduction Firmware is a critical component of electronic devices. It is the program that is installed on embedded systems that defines their functionality. Firmware is responsible for initializing the hardware components as the computer boots up, enabling the device to function properly. Attacks against firmware have been of increasing interest to hackers due to their relative ease to exploit in a world of increasingly more secure application- and network-layer security practices....