Adversaries with privileged network access may seek to modify network traffic in real time using adversary-in-the-middle (AiTM) attacks.^[1] This type of attack allows the adversary to intercept traffic to and/or from a particular device on the network. If a AiTM attack is established, then the adversary has the ability to block, log, modify, or inject traffic into the communication stream. There are several ways to accomplish this attack, but some of the most-common are Address Resolution Protocol (ARP) poisoning and the use of a proxy.^[2]

An AiTM attack may allow an adversary to perform the following attacks:
Block Reporting Message, Spoof Reporting Message, Modify Parameter, Unauthorized Command Message

References

1. Gabriel Sanchez 2017, October Man-In-The-Middle Attack Against Modbus TCP Illustrated with Wireshark Retrieved. 2020/01/05
2. Bonnie Zhu, Anthony Joseph, Shankar Sastry 2011 A Taxonomy of Cyber Attacks on SCADA Systems Retrieved. 2018/01/12

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