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 shared file systems. If access is not restricted, unauthorized hosts may be able to access the system's NFS shares.

Check Content

Check the permissions on shared NFS file systems. Procedure: # cat /etc/dfs/sharetab If the shared file systems do not contain the "rw" or "ro" options that specify a list of hosts or networks, this is a finding.

Fix Text

Edit /etc/dfs/dfstab and add ro and/or rw options (as appropriate) that specify a list of hosts or networks which are permitted access. Re-share the file systems via the following commands: # unshare <the file system entry that was modified> # share <the file system entry that was modified>

Additional Identifiers

Rule ID: SV-35201r1_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.