cis-ubuntu-14-04-lts-3-5-1-ensure-dccp-is-disabled

name	CIS Ubuntu 14.04 LTS - 3.5.1 Ensure DCCP is disabled
description	Verify that the DCCP protocol kernel module is disabled to reduce attack surface
category	cis-os-hardening
version	2.1.0
author	cyberstrike-official
tags	["cis","ubuntu","ubuntu-14.04","level-1","not-scored","network"]
cis_id	3.5.1
cis_benchmark	CIS Ubuntu Linux 14.04 LTS Benchmark v2.1.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	low

3.5.1 Ensure DCCP is disabled (Not Scored)

Profile Applicability

• Level 1 - Server
• Level 1 - Workstation

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.

Audit Procedure

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

modprobe -n -v dccp
# Expected: install /bin/true

lsmod | grep dccp
# Expected: <No output>

Expected Result

install /bin/true

And no output from lsmod | grep dccp.

Remediation

Edit or create the file /etc/modprobe.d/CIS.conf and add the following line:

install dccp /bin/true

Default Value

Not disabled by default.

References

• CIS Controls: 9.1 - Limit Open Ports, Protocols, and Services

Profile

• Level 1 - Server
• Level 1 - Workstation