The Network File System (NFS) server must be configured to restrict file system access to local hosts.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-933	GEN005840	SV-46124r1_rule		Medium

Description
The NFS access option limits user access to the specified level. This assists in protecting exported file systems. If access is not restricted, unauthorized hosts may be able to access the system's NFS exports.

STIG	Date
SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide	2018-09-19

Details

Check Text ( C-43382r1_chk )
Check if the nfs-kernel-server package is installed. It contains the exportfs command as well as the nfsserver process itself. # rpm –q nfs-kernel-server If the package is not installed, this check does not apply. If it is installed, check the permissions on exported NFS file systems. Procedure: # exportfs -v If the exported file systems do not contain the ‘rw’ or ‘ro’ options specifying a list of hosts or networks, this is a finding.

Check Text ( C-43382r1_chk )

Check if the nfs-kernel-server package is installed. It contains the exportfs command as well as the nfsserver process itself.
# rpm –q nfs-kernel-server

If the package is not installed, this check does not apply. If it is installed, check the permissions on exported NFS file systems.

Procedure:
# exportfs -v

If the exported file systems do not contain the ‘rw’ or ‘ro’ options specifying a list of hosts or networks, this is a finding.

Fix Text (F-39466r1_fix)
Edit /etc/exports and add ro and/or rw options (as appropriate) specifying a list of hosts or networks which are permitted access. Re-export the file systems.