cis-ubuntu1604-v200-3-4-1

name	cis-ubuntu1604-v200-3-4-1
description	Ensure DCCP is disabled
category	cis-networking
version	2.0.0
author	cyberstrike-official
tags	["cis","ubuntu","linux","ubuntu-16.04","networking"]
cis_id	3.4.1
cis_benchmark	CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0 - Control 3.4.1

Description

The Datagram Congestion Control Protocol (DCCP) is a transport layer protocol that supports streaming media and telephony. DCCP provides a way to gain access to congestion control, without having to do it at the application layer, but does not provide in-sequence delivery.

Rationale

If the protocol is not required, it is recommended that the drivers not be installed to reduce the potential attack surface.

Impact

None.

Audit Procedure

Command Line

Run the following commands and verify the output is as indicated:

modprobe -n -v dccp

lsmod | grep dccp

Expected Result

install /bin/true

The lsmod command should return no output.

Remediation

Command Line

Edit or create a file in the /etc/modprobe.d/ directory ending in .conf

Example: vi /etc/modprobe.d/dccp.conf

Add the following line:

install dccp /bin/true

Default Value

DCCP module is available but typically not loaded by default.

References

1. CIS Ubuntu Linux 16.04 LTS Benchmark v2.0.0

CIS Controls

Version 7

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.

Profile Applicability

• Level 2 - Server
• Level 2 - Workstation

Assessment Status

Automated