ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier.
https://kb.isc.org/article/AA-00712
http://www.ubuntu.com/usn/USN-1519-1
http://www.securityfocus.com/bid/54665
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
http://www.mandriva.com/security/advisories?name=MDVSA-2012:116
http://www.mandriva.com/security/advisories?name=MDVSA-2012:115
http://www.debian.org/security/2012/dsa-2519
http://www.debian.org/security/2012/dsa-2516
http://security.gentoo.org/glsa/glsa-201301-06.xml
http://rhn.redhat.com/errata/RHSA-2012-1141.html
http://rhn.redhat.com/errata/RHSA-2012-1140.html
http://lists.opensuse.org/opensuse-updates/2012-08/msg00030.html
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761