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CVE-2016-4957

Publication date 5 July 2016

Last updated 24 July 2024

Ubuntu priority

Low

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
ntp 16.04 LTS xenial
Not affected
15.10 wily Ignored end of life
14.04 LTS trusty
Not affected
12.04 LTS precise
Not affected

Notes

mdeslaur

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

Severity score breakdown

Parameter Value
Base score 7.5 · High
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