AlmaLinux OS 9 must prevent special devices on nonroot local partitions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-269290	ALMA-09-023780	SV-269290r1050172_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
CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide	2025-05-22

Details

Check Text (C-73321r1048246_chk)

Verify all nonroot local partitions are mounted with the "nodev" option with the following command:

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

If any output is produced, this is a finding.

Fix Text (F-73222r1048247_fix)

Configure the "/etc/fstab" to use the "nodev" option on all nonroot local partitions.