SV-35201r1: The Network File System (NFS) server must be configured to restrict file system access to local hosts. | HP-UX 11.31 Security Technical Implementation Guide

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Assessment Title

Rule Text

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

Description

Discussion Text

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.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000366

Additional Details

Responsibility

System Administrator

IA Controls

ECSC-1

References

DPMS Target HP-UX 11.31 DISA DPMS Target HP-UX 11.31 2171

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

#!/bin/bash
# Reconstructed from oval:mil.disa.fso.hpux11:def:347
# The Network File System (NFS) server must be configured to restrict file system access to local hosts.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# all shares have ro= or rw=
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^[ 	]*[^# 	
]+[ 	]*([^#
]*)/\1/p' '/etc/dfs/sharetab') | grep -Pq '(rw=|ro=)'
}

if test_1; then
  echo "PASS"
else
  echo "FAIL"
fi

Assessment Script Powered by AISandbox-executed

A standalone Shell script to assess this control automatically. Review before running it in your environment.

Syntax-checked and actually executed in an isolated sandbox (not the real system this checks) — confirmed to run without errors.

#!/bin/sh
# OVAL Definition: oval:mil.disa.fso.hpux11:def:347
if [ ! -f "/etc/dfs/sharetab" ]; then echo "PASS"; exit 0; fi
grep -q "^[ \t]*[^# \t\r\n]+[ \t]*(ro=|rw=)" /etc/dfs/sharetab || { echo "FAIL"; exit 1; }
echo "PASS"; exit 0

Remediation

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>