cis-ubuntu2004-v300-2-2-6

name	cis-ubuntu2004-v300-2-2-6
description	Ensure ftp client is not installed
category	cis-networking
version	3.0.0
author	cyberstrike-official
tags	["cis","ubuntu","linux","ubuntu-20.04","services","client","ftp"]
cis_id	2.2.6
cis_benchmark	CIS Ubuntu Linux 20.04 LTS Benchmark v3.0.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

Ensure ftp client is not installed

Profile

• Level 1 - Server
• Level 1 - Workstation

Description

The ftp package contains the File Transfer Protocol (FTP) client, which allows users to transfer files to and from remote systems using FTP.

Rationale

The FTP protocol is insecure and uses unencrypted protocols for communication.

Impact

Many insecure service clients are used as troubleshooting tools and in testing environments. Uninstalling them can inhibit capability to test and troubleshoot. If they are required it is advisable to remove the clients after use to prevent accidental or intentional misuse.

Audit

Verify ftp is not installed. The following command may provide the needed information:

Command Line

# dpkg-query -s ftp &>/dev/null && echo "ftp is installed"

Expected Result

Nothing should be returned.

Remediation

Uninstall ftp:

Command Line

# apt purge ftp

References

1. NIST SP 800-53 Rev. 5: CM-7

CIS Controls

Controls Version	Control	IG 1	IG 2	IG 3
v8	4.8 Uninstall or Disable Unnecessary Services on Enterprise Assets and Software Uninstall or disable unnecessary services on enterprise assets and software, such as an unused file sharing service, web application module, or service function.		●	●
v7	9.2 Ensure Only Approved Ports, Protocols and Services Are Running Ensure that only network ports, protocols, and services listening on a system with validated business needs, are running on each system.		●	●

MITRE ATT&CK Mappings

Techniques / Sub-techniques	Tactics	Mitigations
T1203, T1203.000, T1543, T1543.002	TA0006, TA0008	M1041, M1042