full-disclosure - Stealing DHCP Leases

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From: macaddict at ourholm.com (Ian Holm)
Subject: Stealing DHCP Leases

I was noticing that the number of DHCP address in the DHCP cache was running
low so I decided to check which computers were assigned to each address. To
my horror I saw that there were 81 addresses assigned at exactly the same
time and all expired at exactly the same time. I'm assuming that these were
all assigned to the same machine. How is this possible? Where could I learn
about this and how to prevent it?