ISC DHCP DHCPv6 Dynamic DNS Remote Denial of Service Vulnerability

A vulnerability has been identified in ISC DHCP, which can be exploited by malicious people to cause a segmentation fault in ISC DHCP servers using IPv6 and Dynamic DNS, resulting in denial of service to clients.  Due to improper handling of a DHCPv6 lease structure, ISC DHCP servers that are serving IPv6 address pools AND using Dynamic DNS can encounter a segmentation fault error while updating lease status under certain conditions. The potential exists for this condition to be intentionally triggered, resulting in effective denial of service to clients expecting service from the affected server.