ARP spoofing is an attack against an Ethernet or Wi-Fi network to get between the router and the target user. In an ARP-spoofing attack, messages meant for the target are sent to the attacker instead, allowing the attacker to spy on, deny service to, or man-in-the-middle a target. One of the most popular tools for performing this attack is Ettercap, which comes preinstalled on Kali Linux.
On a regular network, messages are routed over Ethernet or Wi-Fi by associating the MAC address of a connected device with the IP address used to identify it by the router. Usually, this happens via an address resolution protocol (ARP) message indicating which device's MAC address goes with which IP address. It lets the rest of the network know where to send traffic — but it can be easily spoofed to change the way traffic is routed.
In an ARP-spoofing attack, a program like Ettercap will send spoofed messages attempting to get nearby devices to associate the hacker's MAC address with the IP address of the target. When successful, they're stored temporarily in a configuration setting on other network devices. If the rest of the network starts delivering packets intended for the target to the attacker instead, the attacker effectively controls the target's data connection.
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Types of ARP Spoofing Attacks
There can be three primary outcomes after an attacker gains initial success in poisoning the ARP cache of other hosts on the network:
The attacker can spy on traffic. They can lurk in the shadows, seeing everything that the target user does on the network. It's pretty self-explanatory.
The attacker can intercept and modify the packets in a man-in-the-middle attack. They ca ..
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