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CVE-2016-4957

Published: 5 July 2016

ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet. NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.

Notes

AuthorNote
mdeslaur
incorrect fix for CVE-2016-1547
redhat's fix for CVE-2016-1547 doesn't introduce this issue
Ubuntu uses redhat's fix

Priority

Low

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