cis-ubuntu1204-v110-7-4-1

name	cis-ubuntu1204-v110-7-4-1
description	Install TCP Wrappers
category	cis-os-hardening
version	1.1.0
author	cyberstrike-official
tags	["cis","ubuntu",12.04,"linux","networking","tcp-wrappers","access-control"]
cis_id	7.4.1
cis_benchmark	CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

7.4.1 Install TCP Wrappers (Scored)

Profile Applicability

• Level 1

Description

TCP Wrappers provides a simple access list and standardized logging method for services capable of supporting it. In the past, services that were called from inetd and xinetd supported the use of tcp wrappers. As inetd and xinetd have been falling in disuse, any service that can support tcp wrappers will have the libwrap.so library attached to it.

Rationale

TCP Wrappers provide a good simple access list mechanism to services that may not have that support built in. It is recommended that all services that can support TCP Wrappers, use it.

Audit Procedure

Using Command Line

Run the following to ensure tcpd is installed:

dpkg -s tcpd

Ensure package status is installed ok installed.

To verify if a service supports TCP Wrappers, run the following command:

ldd <path-to-daemon> | grep libwrap.so

If there is any output, then the service supports TCP Wrappers.

Expected Result

Status: install ok installed

Remediation

Using Command Line

Install tcpd:

apt-get install tcpd

Default Value

TCP Wrappers is not installed by default.

References

• CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

Profile

Level 1 - Scored