An FR-GV-304 issue in FreeRADIUS 3.x before 3.0.15 allows "DHCP - Buffer over-read in fr_dhcp_decode_suboptions()" and a denial of service.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2017-2625
https://access.redhat.com/errata/RHSA-2017:2389
http://www.securityfocus.com/bid/99970