Network Time Protocol Daemon (ntpd) read_mru_list() Remote DoS

High Nessus Plugin ID 95389


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


The remote NTP server is affected by a denial of service vulnerability due to improper validation of mrulist queries. An unauthenticated, remote attacker can exploit this, via a specially crafted NTP mrulist query packet, to terminate the ntpd process.

Note that the NTP server is reportedly affected by additional vulnerabilities as well; however, Nessus has not tested for these.


Upgrade to NTP version 4.2.8p9 or later.

See Also

Plugin Details

Severity: High

ID: 95389

File Name: ntp_cve-2016-7434.nasl

Version: $Revision: 1.7 $

Type: remote

Family: Misc.

Published: 2016/11/29

Modified: 2017/04/17

Dependencies: 10884

Risk Information

Risk Factor: High


Base Score: 7.8

Temporal Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND


Base Score: 7.5

Temporal Score: 6.9

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

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:X

Vulnerability Information

CPE: cpe:/a:ntp:ntp

Required KB Items: NTP/Running

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2016/11/21

Vulnerability Publication Date: 2016/11/21

Reference Information

CVE: CVE-2016-7434

BID: 94448

OSVDB: 147600

CERT: 633847

EDB-ID: 40806