cis-ubuntu1204-v110-6-8

name	cis-ubuntu1204-v110-6-8
description	Ensure DNS Server is not enabled
category	cis-os-hardening
version	1.1.0
author	cyberstrike-official
tags	["cis","ubuntu",12.04,"linux","dns","bind9","attack-surface"]
cis_id	6.8
cis_benchmark	CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

6.8 Ensure DNS Server is not enabled (Not Scored)

Profile Applicability

• Level 1

Description

The Domain Name System (DNS) is a hierarchical naming system that maps names to IP addresses for computers, services and other resources connected to a network.

Rationale

Unless a server is specifically designated to act as a DNS server, it is recommended that the package be deleted to reduce the potential attack surface.

Audit Procedure

Using Command Line

Run the following to ensure no start links for bind9 exist in /etc/rc*.d:

ls /etc/rc*.d/S*bind9

Expected Result

No results should be returned.

Remediation

Using Command Line

Remove any start links for bind9 from /etc/rc*.d:

rm /etc/rc*.d/S*bind9

Default Value

Not installed by default on Ubuntu 12.04 LTS Server.

References

• CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

Profile

Level 1 - Not Scored