cis-ubuntu1204-v110-2-10

name	cis-ubuntu1204-v110-2-10
description	Add nodev Option to /home
category	cis-os-hardening
version	1.1.0
author	cyberstrike-official
tags	["cis","ubuntu",12.04,"linux","filesystem","home","nodev","mount-options"]
cis_id	2.10
cis_benchmark	CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

2.10 Add nodev Option to /home (Scored)

Profile Applicability

• Level 1

Description

When set on a file system, this option prevents character and block special devices from being defined, or if they exist, from being used as character and block special devices.

Rationale

Since the user partitions are not intended to support devices, set this option to ensure that users cannot attempt to create block or character special devices.

Note: The actions in the item refer to the /home partition, which is the default user partition that is defined in many distributions. If you have created other user partitions, it is recommended that the Remediation and Audit steps be applied to these partitions as well.

Audit Procedure

Using Command Line

grep /home /etc/fstab | grep nodev
mount | grep /home | grep nodev

Expected Result

Both commands should return output showing nodev is set. If either command emits no output then the system is not configured as recommended.

Remediation

Using Command Line

Edit the /etc/fstab file and add nodev to the fourth field (mounting options). See the fstab(5) manual page for more information.

mount -o remount,nodev /home

Default Value

By default, the nodev option is not set on the /home partition.

References

• CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

Profile

Level 1 - Scored