RHEL 9 must prevent special devices on non-root local partitions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257881	RHEL-09-231200	SV-257881r991589_rule		Medium

Description

The "nodev" mount option causes the system to not interpret character or block special devices. Executing character or block special devices from untrusted file systems increases the opportunity for nonprivileged users to attain unauthorized administrative access. The only legitimate location for device files is the "/dev" directory located on the root partition, with the exception of chroot jails if implemented.

STIG	Date
Red Hat Enterprise Linux 9 Security Technical Implementation Guide	2024-12-04

Details

Check Text (C-61622r925628_chk)

Verify all non-root local partitions are mounted with the "nodev" option with the following command:

$ sudo mount | grep '^/dev\S* on /\S' | grep --invert-match 'nodev'

If any output is produced, this is a finding.

Fix Text (F-61546r925629_fix)

Configure the "/etc/fstab" to use the "nodev" option on all non-root local partitions.