NTP before 4.2.8p10 and 4.3.x before 4.3.94 allows remote attackers to cause a denial of service (ntpd crash) via a malformed mode configuration directive.
http://support.ntp.org/bin/view/Main/NtpBug3389
http://support.ntp.org/bin/view/Main/SecurityNotice#March_2017_ntp_4_2_8p10_NTP_Secu
http://www.securityfocus.com/bid/97050
http://www.securitytracker.com/id/1038123
https://access.redhat.com/errata/RHSA-2017:3071
https://access.redhat.com/errata/RHSA-2018:0855
https://security.FreeBSD.org/advisories/FreeBSD-SA-17:03.ntp.asc
https://support.apple.com/HT208144
https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03962en_us
Source: MITRE
Published: 2017-03-27
Updated: 2018-04-12
Type: CWE-20
Base Score: 4
Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P
Impact Score: 2.9
Exploitability Score: 8
Severity: MEDIUM
Base Score: 6.5
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Impact Score: 3.6
Exploitability Score: 2.8
Severity: MEDIUM