cis-ubuntu1204-v110-5-1-3

name	cis-ubuntu1204-v110-5-1-3
description	Ensure rsh client is not installed
category	cis-os-hardening
version	1.1.0
author	cyberstrike-official
tags	["cis","ubuntu",12.04,"linux","rsh","legacy-services","package-management"]
cis_id	5.1.3
cis_benchmark	CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

5.1.3 Ensure rsh client is not installed (Scored)

Profile Applicability

• Level 1

Description

The rsh package contains the client commands for the rsh services.

Rationale

These legacy clients contain numerous security exposures and have been replaced with the more secure SSH package. Even if the server is removed, it is best to ensure the clients are also removed to prevent users from inadvertently attempting to use these commands and therefore exposing their credentials. Note that removing the rsh package removes the clients for rsh, rcp and rlogin.

Audit Procedure

Using Command Line

Run the following commands:

dpkg -s rsh-client
dpkg -s rsh-redone-client

Expected Result

Ensure package status is not-installed or dpkg returns no info is available for both.

Remediation

Using Command Line

Uninstall the rsh-client and rsh-reload-client packages:

apt-get purge rsh-client rsh-reload-client

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 - Scored