SV-227645r603266: The /etc/group file must be group-owned by root, bin, or sys. | Solaris 10 X86 STIG SCAP Benchmark

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Assessment Title

Rule Text

The /etc/group file must be group-owned by root, bin, or sys.

Description

Discussion Text

The /etc/group file is critical to system security and must be protected from unauthorized modification. The group file contains a list of system groups and associated information.

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

IA Controls

NIST SP 800-53

Not mappedCCI-000366V-22336SV-39899

References

DPMS Target Solaris 10 X86 DISA DPMS Target Solaris 10 X86 4061

Checks

DISA STIG (Manual Reference)

Check the group ownership of the /etc/group file.

Procedure:
# ls -lL /etc/group

If the file is not group-owned by root, bin, or sys, this is a finding.

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:99
# The /etc/group 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/group is root
# file_object (file_test)
test_1() {
  [ "$(stat -c '%g' '/etc/group')" -eq 0 ]
}
# Test existence of group bin
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  grep -Pq '^bin:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/group is bin
# file_object (file_test)
test_3() {
  [ "$(stat -c '%g' '/etc/group')" = "$(sed -En 's/^bin:[^:]*:([0-9]+):/\1/p' '/etc/group')" ]
}
# Test existence of group sys
# textfilecontent54_object (textfilecontent54_test)
test_4() {
  grep -Pq '^sys:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/group is sys
# file_object (file_test)
test_5() {
  [ "$(stat -c '%g' '/etc/group')" = "$(sed -En 's/^sys:[^:]*:([0-9]+):/\1/p' '/etc/group')" ]
}
# Test existence of group system
# textfilecontent54_object (textfilecontent54_test)
test_6() {
  grep -Pq '^system:[^:]*:([0-9]+):' '/etc/group' &>/dev/null
}
# Test group of /etc/group is system
# file_object (file_test)
test_7() {
  [ "$(stat -c '%g' '/etc/group')" = "$(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:99
if [ ! -f "/etc/group" ]; then echo "PASS"; exit 0; fi
if [ "$(stat -c '%G' /etc/group)" = "root" ] || [ "$(stat -c '%G' /etc/group)" = "bin" ] || [ "$(stat -c '%G' /etc/group)" = "sys" ]; then echo "PASS"; exit 0; else echo "FAIL"; exit 1; fi

Remediation

Change the group owner of the /etc/group file.

Procedure:
# chgrp root /etc/group