cis-ubuntu1604-v200-2-1-17

name	cis-ubuntu1604-v200-2-1-17
description	Ensure NIS Server is not installed
category	cis-networking
version	2.0.0
author	cyberstrike-official
tags	["cis","ubuntu","linux","ubuntu-16.04","services"]
cis_id	2.1.17
cis_benchmark	CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

2.1.17 Ensure NIS Server is not installed (Automated)

Description

The Network Information Service (NIS) (formally known as Yellow Pages) is a client-server directory service protocol for distributing system configuration files. The NIS server is a collection of programs that allow for the distribution of configuration files.

Rationale

The NIS service is inherently an insecure system that has been vulnerable to DOS attacks, buffer overflows and has poor authentication for querying NIS maps. NIS generally has been replaced by such protocols as Lightweight Directory Access Protocol (LDAP). It is recommended that the service be removed and other, more secure services be used.

Audit Procedure

Command Line

Run the following command to verify nis is not installed:

dpkg -s nis | grep -E '(Status:|not installed)'

Expected Result

dpkg-query: package 'nis' is not installed and no information is available

Remediation

Command Line

Run the following command to remove nis:

apt purge nis

Default Value

nis is not installed on minimal server installations.

References

1. CIS Controls v7 - 9.2 Ensure Only Approved Ports, Protocols and Services Are Running

Profile

• Level 1 - Server
• Level 1 - Workstation