Debian LTS: DLA-2003-1: isc-dhcp security update
Summary
The number of simultaneous open TCP connections to OMAPI port of the
server has to be limited to 200 in order to avoid a denial of service.
For Debian 8 "Jessie", this problem has been fixed in version
4.3.1-6+deb8u4.
We recommend that you upgrade your isc-dhcp packages.
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS