RHEL 8 must prevent special devices on file systems that are imported via Network File System (NFS).

STIG ID: RHEL-08-010640  |  SRG: SRG-OS-000480-GPOS-00227 |  Severity: medium |  CCI: CCI-000366 |  Vulnerability Id: V-230307 | 

Vulnerability 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 unprivileged users to attain unauthorized administrative access.

Check

Verify file systems that are being NFS-imported are mounted with the "nodev" option with the following command:

$ sudo grep nfs /etc/fstab | grep nodev

UUID=e06097bb-cfcd-437b-9e4d-a691f5662a7d /store nfs rw,nosuid,nodev,noexec 0 0

If a file system found in "/etc/fstab" refers to NFS and it does not have the "nodev" option set, this is a finding.

Fix

Configure the "/etc/fstab" to use the "nodev" option on file systems that are being imported via NFS.
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