SV-34952r1: The /etc/shells (or equivalent) file must exist. | HP-UX 11.31 Security Technical Implementation Guide

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Assessment Title

Rule Text

The /etc/shells (or equivalent) file must exist.

Description

Discussion Text

The shells file (or equivalent) lists approved default shells. It helps provide layered defense to the security approach by ensuring users cannot change their default shell to an unauthorized, unsecure shell.

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:126
# The /etc/shells (or equivalent) file must exist.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# /etc/shells file must exist
# file_object (file_test)
test_1() {
  test -e '/etc/shells' &>/dev/null
}

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:126
if [ ! -f "/etc/shells" ]; then echo "FAIL"; exit 1; fi; echo "PASS"; exit 0

Remediation

Create /etc/shells file containing a list of valid system shells. Consult vendor documentation for an appropriate list of system shells.

Procedure:
Typical installed shells include:
/sbin/sh
/usr/bin/sh
/usr/bin/rsh
/usr/bin/ksh
/usr/bin/rksh
/usr/bin/csh
/usr/bin/keysh

# echo "/sbin/sh" >> /etc/shells

(Repeat as necessary for all existing shell programs.)