Network Time Protocol Daemon (ntpd) 3.x / 4.x < 4.2.8p3 Denial Of Service Vulnerability

medium Nessus Plugin ID 121310


The remote NTP server is affected by a denial of service vulnerability.


The version of the remote NTP server is 3.x or 4.x prior to 4.2.8p3.
It is, therefore, affected by the following vulnerability :

- ntpd in ntp before 4.2.8p3 with remote configuration enabled allows remote authenticated users with knowledge of the configuration password and access to a computer entrusted to perform remote configuration to cause a denial of service (service crash) via a NULL byte in a crafted configuration directive packet. (CVE-2015-1798)


Upgrade to NTP version 4.2.8p3 or later.

See Also

Plugin Details

Severity: Medium

ID: 121310

File Name: ntp_4_2_8p3.nasl

Version: 1.2

Type: remote

Family: Misc.

Published: 1/22/2019

Updated: 10/31/2019

Configuration: Enable paranoid mode

Risk Information


Risk Factor: Low

Score: 3.6


Risk Factor: Low

Base Score: 3.5

Temporal Score: 2.6

Vector: AV:N/AC:M/Au:S/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS Score Source: CVE-2015-5146


Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:ntp:ntp

Required KB Items: NTP/Running, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 6/29/2015

Vulnerability Publication Date: 6/16/2015

Reference Information

CVE: CVE-2015-5146