Title

AIX 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 the permissions on exported NFS file systems by running command: # exportfs -v /export/shared -ro,access=10.17.76.74 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: # /usr/sbin/exportfs -a

Additional Identifiers

Rule ID: SV-215330r508663_rule

Vulnerability ID: V-215330

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

Expert Comments

CCIs tied to check.

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