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

Documentable No

Rule ID SV-257881r1155663_rule

CCI References

CCI-000366

Discussion

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.

Check Procedure

Note: This control is not applicable to vfat file systems.

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 Action

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