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A vulnerability in the ARP protocol allows any host on a local network to send forged ARP replies, thereby poisoning the ARP cache of other hosts. This enables an attacker to associate their MAC address with the IP address of another host, facilitating IP address spoofing or denial of service attacks. The vulnerability is inherent to the ARP protocol design, which lacks authentication for ARP messages.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository contains a single Metasploit auxiliary module for ARP spoofing (modules/auxiliary/spoof/arp/arp_poisoning.rb). The module enables an attacker to poison the ARP cache of target machines on a local network by sending forged ARP reply packets. The attacker can specify which IP addresses to impersonate (SHOSTS), which IP addresses to target (DHOSTS), and optionally the MAC address to use (SMAC) and the network interface. The module supports bidirectional poisoning, automatic host discovery, and can operate in broadcast mode. It is designed for use in man-in-the-middle attacks, denial of service, or general ARP cache manipulation. The exploit is operational and requires the attacker to be on the same network segment as the targets. No hardcoded endpoints are present; all targets are user-supplied at runtime. The code is written in Ruby and is intended to be run within the Metasploit Framework.
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