Fuzzing Framework for IEC 60870-5-104 Protocol

The importance of SCADA systems within the power grid is currently increasing due to the increased complexity of the grid. Thus, these systems may contain various security vulnerabilities, the exploitation of which may lead to large-scale blackouts. Therefore, the emphasis is nowadays on cyber security. One tool for automated testing and detection of hard-to-detect vulnerabilities such as buffer overflow and others is fuzzing. This paper discusses the fuzzing testing capabilities of IEC 60870-5-104 protocol which is used by power grid. We present a framework that can be used for automated testing. By using load balancing, high performance of the fuzzing process is achieved. The framework also provides a graphical environment to facilitate continuous testing. The functionality of the framework is demonstrated on a demonstration server into which a buffer overflow vulnerability was inserted, which was detected by the fuzzing framework.