An isc-dhcp security update has been released for Debian GNU/Linux 8 LTS

Package : isc-dhcp
Version : 4.3.1-6+deb8u4
CVE ID : CVE-2016-2774

An issue has been found in isc-dhcp, a server for automatic IP address
assignment.

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