racoon remote denial of service vulnerability (ISAKMP header length field)

When racoon receives an ISAKMP header, it will attempt to
allocate sufficient memory for the entire ISAKMP message
according to the header’s length field. If an attacker
crafts an ISAKMP header with a ridiculously large value
in the length field, racoon may exceed operating system
resource limits and be terminated, resulting in a denial of
service.