Title

RHEL 9 must prevent special devices on non-root local partitions. (Cat II impact)

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 Content

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

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

Additional Identifiers

Rule ID: SV-257881r925630_rule

Vulnerability ID: V-257881

Group Title: SRG-OS-000480-GPOS-00227

Expert Comments

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