ENIP Fuzz: a Scapy-based EtherNet/IP fuzzer for security testing
Nguyen, Thuy D.
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EtherNet/IP is an industrial protocol that is built on top of the TCP/IP protocol suite. Though extending TCP/IP connectivity to industrial control systems (ICS) has enabled operators to implement more agile practices, it also has made ICSs more readily accessible to the outside world. Embedded control systems on Navy afloat and ashore platforms utilize EtherNet/IP, making those platforms prime targets for cyber attack. Fuzzing technology can analyze the message structure of ICS protocols like EtherNet/IP to help inform users on the robustness of the implementation. This thesis explores a proprietary EtherNet/IP implementation to determine its susceptibility to malformed packets. ENIP Fuzz, a Scapy-based fuzzer, was built to test for potential security vulnerabilities in EtherNet/IP implementations. This custom fuzz testing tool verifies the robustness of target applications or devices in handling abnormal input data. Results of this effort revealed a previously unreported vulnerability in an industrial controller commonly used in Navy control systems that causes a Denial of Service (DoS) by a single malformed packet.
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