cis-ubuntu1204-v110-2-12

name	cis-ubuntu1204-v110-2-12
description	Add noexec Option to Removable Media Partitions
category	cis-os-hardening
version	1.1.0
author	cyberstrike-official
tags	["cis","ubuntu",12.04,"linux","filesystem","removable-media","noexec","mount-options"]
cis_id	2.12
cis_benchmark	CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0
tech_stack	["ubuntu","linux"]
cwe_ids	[]
chains_with	[]
prerequisites	[]
severity_boost	{}

2.12 Add noexec Option to Removable Media Partitions (Not Scored)

Profile Applicability

• Level 1

Description

Set noexec on removable media to prevent programs from executing from the removable media.

Rationale

Setting this option on a file system prevents users from executing programs from the removable media. This deters users from being able to introduce potentially malicious software on the system.

Audit Procedure

Using Command Line

grep <each removable media mountpoint> /etc/fstab

Verify that noexec is an option.

Expected Result

The noexec option should be present in the mount options for each removable media mountpoint.

Remediation

Using Command Line

Edit the /etc/fstab file and add noexec to the fourth field (mounting options). Look for entries that have mount points that contain words such as floppy or cdrom. See the fstab(5) manual page for more information.

Default Value

By default, the noexec option is not set on removable media partitions.

References

• CIS Ubuntu 12.04 LTS Server Benchmark v1.1.0

Profile

Level 1 - Not Scored