cis-ubuntu1204-v110-7-5-2

name	cis-ubuntu1204-v110-7-5-2
description	Disable SCTP
category	cis-os-hardening
version	1.1.0
author	cyberstrike-official
tags	["cis","ubuntu",12.04,"linux","networking","sctp","kernel-module","attack-surface"]
cis_id	7.5.2
cis_benchmark	CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

7.5.2 Disable SCTP (Not Scored)

Profile Applicability

• Level 1

Description

The Stream Control Transmission Protocol (SCTP) is a transport layer protocol used to support message oriented communication, with several streams of messages in one connection. It serves a similar function as TCP and UDP, incorporating features of both. It is message-oriented like UDP, and ensures reliable in-sequence transport of messages with congestion control like TCP.

Rationale

If the protocol is not being used, it is recommended that kernel module not be loaded, disabling the service to reduce the potential attack surface.

Audit Procedure

Using Command Line

Perform the following to determine if SCTP is disabled.

grep "install sctp /bin/true" /etc/modprobe.d/CIS.conf

Expected Result

install sctp /bin/true

Remediation

Using Command Line

echo "install sctp /bin/true" >> /etc/modprobe.d/CIS.conf

Default Value

SCTP kernel module is available by default.

References

• CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

Profile

Level 1 - Not Scored