Designing and Implementing Malicious Hardware

Hidden malicious circuits provide an attacker with a stealthy attack vector. As they occupy a layer below the entire software stack, malicious circuits can bypass traditional defensive techniques. Yet current work on trojan circuits considers only simple attacks against the hardware itself, and straightforward defenses. More complex designs that attack the software are unexplored, as are the countermeasures an attacker may take to bypass proposed defenses. We present the design and implementation of Illinois Malicious Processors (IMPs). There is a substantial design space in malicious circuitry; we show that an attacker, rather than designing one specific attack, can instead design hardware to support attacks. Such flexible hardware allows powerful, general purpose attacks, while remaining surprisingly low in the amount of additional hardware. We show two such hardware designs, and implement them in a real system. Further, we show three powerful attacks using this hardware, including ...

• Type: Conference
• Year: 2008
• Where: NSDI
• Authors: Samuel T. King, Joseph Tucek, Anthony Cozzie, Chris Grier, Weihang Jiang, Yuanyuan Zhou
• Keywords: Computer Networks, Illinois Malicious Processors, Malicious Circuits, Malicious Processors, NSDI 2008