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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 2024-06-04

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.