Chapter 5. Leveraging DHCP Weaknesses
DHCP is a common and useful LAN protocol. It is rare to come across a networked device today that doesn’t support it. Printers, IP phones, laptops, and routers can all acquire an IP address dynamically using DHCP—and they often do. DHCP has become a de facto building block of many modern LANs. Just like several protocol implementations covered in this book, DHCP wasn’t built with security in mind. Hackers know that and, naturally, some tools have surfaced to take advantage of DHCP’s weaknesses. As one attack tool puts it:
The common term is Dynamic Host Configuration Protocol, but it should be known as the Domain Hijack and Control Protocol as it is seriously flawed.1
Denial of service (DoS), address spoofing, ...
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