A Search-based Firmware Code Analysis Method for IoT Devices

The firmware vulnerability is one of the most serious threats for Internet-of-Things (IoT) security. However, it is hard to investigate firmware, due to the lack of source code and the complicated structure. In this paper, a searchbased firmware code analysis method is proposed to associate the program functionalities with the assembly code. In the experiment, the firmware of Siemens PAC4200 power meter is selected to demonstrate how to search the assembly code of device information interface. Moreover, one vulnerability of this interface is shown, which would be exploited to manipulate the data of device.