AlmaLinux OS 9 must prevent special devices on file systems that are imported via Network File System (NFS).

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-269285	ALMA-09-023120	SV-269285r1050167_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.

STIG	Date
CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide	2025-05-22

Details

Check Text (C-73316r1049441_chk)

Note: If no NFS mounts are configured, this requirement is Not Applicable.

Verify AlmaLinux OS 9 has the "nodev" option configured for all NFS mounts with the following command:

$ grep nfs /etc/fstab

192.168.1.9:/mnt/export /backups nfs4 rw,nosuid,nodev,noexec,sync,soft,sec=krb5p:krb5i:krb5

If the system is mounting file systems via NFS and the "nodev" option is missing, this is a finding.

Fix Text (F-73217r1048232_fix)

Update each NFS mounted file system to use the "nodev" option on file systems that are being imported via NFS.