Network Time Protocol (NTP) Mode 6 Scanner

Medium Nessus Plugin ID 97861


The remote NTP server responds to mode 6 queries.


The remote NTP server responds to mode 6 queries. Devices that respond to these queries have the potential to be used in NTP amplification attacks. An unauthenticated, remote attacker could potentially exploit this, via a specially crafted mode 6 query, to cause a reflected denial of service condition.


Restrict NTP mode 6 queries.

See Also

Plugin Details

Severity: Medium

ID: 97861

File Name: ntp_mode6_query.nasl

Version: 1.2

Type: remote

Family: Misc.

Published: 2017/03/21

Updated: 2018/05/07

Dependencies: 10884

Risk Information

Risk Factor: Medium

CVSS v2.0

Base Score: 5

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

CVSS v3.0

Base Score: 5.8

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

Vulnerability Information

Required KB Items: Services/udp/ntp