SV-26813r1: The NFS export configuration file must be group-owned by root, bin, or sys. | SOLARIS 9 SPARC SECURITY TECHNICAL IMPLEMENTATION GUIDE

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Assessment Title

Rule Text

The NFS export configuration file must be group-owned by root, bin, or sys.

Description

Discussion Text

Failure to give group ownership of the NFS export configuration file to root or system groups provides the designated group owner and possible unauthorized users with the potential to change system configuration which could weaken the system's security posture.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000225

Additional Details

Responsibility

System Administrator

IA Controls

ECLP-1

References

DPMS Target Solaris 9 Sparc DISA DPMS Target Solaris 9 Sparc 21

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.solaris11:def:349
# The NFS export configuration file must be group-owned by root, bin, or sys.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Test group of /etc/dfs/dfstab is root
# file_object (file_test)
test_1() {
  [ "$(stat -c '%g' '/etc/dfs/dfstab')" -eq 0 ]
}
# Test existence of group bin
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -Pq '^bin:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/dfs/dfstab is bin
# file_object (file_test)
test_3() {
  [ "$(stat -c '%g' '/etc/dfs/dfstab')" = "$(sed -En 's/^bin:[^:]*:([0-9]+):/\1/p' '/etc/group')" ]
}
# Test existence of group sys
# textfilecontent54_object (textfilecontent54_test)
test_4() {
  grep -Pq '^sys:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/dfs/dfstab is sys
# file_object (file_test)
test_5() {
  [ "$(stat -c '%g' '/etc/dfs/dfstab')" = "$(sed -En 's/^sys:[^:]*:([0-9]+):/\1/p' '/etc/group')" ]
}
# Test existence of group system
# textfilecontent54_object (textfilecontent54_test)
test_6() {
  grep -Pq '^system:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/dfs/dfstab is system
# file_object (file_test)
test_7() {
  [ "$(stat -c '%g' '/etc/dfs/dfstab')" = "$(sed -En 's/^system:[^:]*:([0-9]+):/\1/p' '/etc/group')" ]
}

if ( test_1 || ( test_2 && test_3 ) || ( test_4 && test_5 ) || ( test_6 && test_7 ) ); 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.solaris11:def:349
if [ ! -f "/etc/dfs/dfstab" ]; then echo "PASS"; exit 0; fi
if [ $(stat -c '%G' /etc/dfs/dfstab) = root ] || [ $(grep -E "^bin:[^:]*:" /etc/group | wc -l) -gt 0 ] || [ $(grep -E "^sys:[^:]*:" /etc/group | wc -l) -gt 0 ]; then echo "PASS"; exit 0; fi
echo "FAIL"; exit 1

Remediation

Change the group ownership of the NFS export configuration file.

Procedure:
# chgrp root /etc/dfs/dfstab