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 | CCI-000366 | 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 | 2025-05-14 | |||
Details
Check Text (C-257881r991589_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.