An issue with the use of lease times was found and fixed. Making
certain changes to the end time of an IPv6 lease could cause the
server to abort. Thanks to Glen Eustace of Massey University,
New Zealand for finding this issue.
CVE-2012-3570: An Error in the Handling of an Unexpected Client
Identifiers can Cause Server Crash When Serving DHCPv6
CVE-2012-3571: An Error in the Handling of Malformed Client Identifiers
can Cause a Denial-of-Service Condition in Affected Servers
CVE-2012-3954: Memory Leaks Found in ISC DHCP