Buffer overflow in ISC DHCP 4.2.x before 4.2.4-P1, when DHCPv6 mode is enabled, allows remote attackers to cause a denial of service (segmentation fault and daemon exit) via a crafted client identifier parameter.
https://kb.isc.org/article/AA-00714
http://www.securityfocus.com/bid/54665
http://www.mandriva.com/security/advisories?name=MDVSA-2012:115
http://security.gentoo.org/glsa/glsa-201301-06.xml
http://lists.opensuse.org/opensuse-updates/2012-08/msg00030.html