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CVE-2016-4953

Published: 5 July 2016

ntpd in NTP 4.x before 4.2.8p8 allows remote attackers to cause a denial of service (ephemeral-association demobilization) by sending a spoofed crypto-NAK packet with incorrect authentication data at a certain time.

Notes

AuthorNote
mdeslaur
incomplete fix for CVE-2015-7979 and CVE-2016-1547
redhat's fix for CVE-2015-7979 doesn't introduce this CVE
Ubuntu uses redhat's fix

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
ntp
Launchpad, Ubuntu, Debian
precise Not vulnerable

trusty Not vulnerable

upstream Needs triage

wily Ignored
(end of life)
xenial Not vulnerable

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