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CVE-2016-4956

Published: 4 July 2016

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (interleaved-mode transition and time change) via a spoofed broadcast packet. NOTE: this vulnerability exists because of an incomplete fix for CVE-2016-1548.

Notes

AuthorNote
mdeslaur
incomplete fix for CVE-2016-1548

Priority

Low

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package Release Status
ntp
Launchpad, Ubuntu, Debian
precise
Released (1:4.2.6.p3+dfsg-1ubuntu3.11)
trusty
Released (1:4.2.6.p5+dfsg-3ubuntu2.14.04.10)
upstream Needs triage

wily Ignored
(end of life)
xenial
Released (1:4.2.8p4+dfsg-3ubuntu5.3)
yakkety Not vulnerable
(1:4.2.8p8+dfsg-1ubuntu2)
zesty Not vulnerable
(1:4.2.8p8+dfsg-1ubuntu2)
Patches:
vendor: http://pkgs.fedoraproject.org/cgit/rpms/ntp.git/tree/ntp-4.2.6p5-cve-2016-4956.patch

Severity score breakdown

Parameter Value
Base score 5.3
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact Low
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L