Adresses:
CVE-2014-9293: ntp: automatic generation of weak default key in config_auth()
CVE-2014-9294: ntp: ntp-keygen uses weak random number generator and seed when generating MD5 keys
CVE-2014-9295: ntp: Multiple buffer overflows via specially-crafted packets
CVE-2014-9296: ntp: receive() missing return on error