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CVE-2016-7426

Published: 13 January 2017

NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.

Notes

AuthorNote
tyhicks
"Affects ntp-4.2.5p203, up to but not including ntp-4.2.8p9, and
ntp-4.3.0 up to, but not including ntp-4.3.94."

Priority

Low

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
ntp
Launchpad, Ubuntu, Debian
artful Not vulnerable
(1:4.2.8p9+dfsg-2ubuntu1)
bionic Not vulnerable
(1:4.2.8p9+dfsg-2ubuntu1)
cosmic Not vulnerable
(1:4.2.8p9+dfsg-2ubuntu1)
precise Ignored
(end of life)
trusty
Released (1:4.2.6.p5+dfsg-3ubuntu2.14.04.11)
upstream
Released (1:4.2.8p9+dfsg-1)
xenial
Released (1:4.2.8p4+dfsg-3ubuntu5.5)
yakkety
Released (1:4.2.8p8+dfsg-1ubuntu2.1)
zesty Not vulnerable
(1:4.2.8p9+dfsg-2ubuntu1)
Patches:
vendor: https://git.centos.org/blob/rpms!ntp.git/4eb1db127a6177011bd913bf4f446e8f701179d6/SOURCES!ntp-4.2.6p5-cve-2016-7426.patch

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H