ISC DHCP 4.x before 4.1-ESV-R12-P1, 4.2.x, and 4.3.x before 4.3.3-P1 allows remote attackers to cause a denial of service (application crash) via an invalid length field in a UDP IPv4 packet.
https://kb.isc.org/article/AA-01334
https://blogs.sophos.com/2016/02/29/utm-up2date-9-319-released/
https://blogs.sophos.com/2016/02/17/utm-up2date-9-354-released/
http://www.ubuntu.com/usn/USN-2868-1
http://www.securitytracker.com/id/1034657
http://www.securityfocus.com/bid/80703
http://www.oracle.com/technetwork/topics/security/bulletinjan2016-2867206.html
http://www.debian.org/security/2016/dsa-3442
http://lists.opensuse.org/opensuse-updates/2016-02/msg00168.html
http://lists.opensuse.org/opensuse-updates/2016-02/msg00162.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/176031.html
http://lists.fedoraproject.org/pipermail/package-announce/2016-January/175594.html