Title

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

Discussion

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.

Check Content

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

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.

Additional Identifiers

Rule ID: SV-46124r1_rule

Vulnerability ID: V-933

Group Title: GEN005840

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.