The log_config_command function in ntp_parser.y in ntpd in NTP before 4.2.7p42 allows remote attackers to cause a denial of service (ntpd crash) via crafted logconfig commands.
- http://www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
- https://github.com/Live-Hack-CVE/CVE-2015-5194