SV-38552r1: Default system accounts (with the exception of root) must not be listed in the at.allow file or must be included in the at.deny file if the at.allow file does not exist. | HP-UX 11.31 Security Technical Implementation Guide

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Assessment Title

Rule Text

Default system accounts (with the exception of root) must not be listed in the at.allow file or must be included in the at.deny file if the at.allow file does not exist.

Description

Discussion Text

Default accounts, such as bin, sys, adm, uucp, daemon, and others, should never have access to the at facility. This would create a possible vulnerability open to intruders or malicious users.

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

ECPA-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:187
# Default system accounts (with the exception of root) must not be listed in the at.allow file or must be included in the at.deny file if the at.allow file does not exist.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.
#
# MANUAL REVIEW REQUIRED -- the module(s) below could not be reconstructed
# into working code from curated SCC reference data, and are excluded from
# the automated result:
#   - textfilecontent54_object (textfilecontent54_test) -- default system accounts (other than root) are not listed in /var/adm/cron/at.allow: field "subexpression"'s live variable comparison could not be built

# check /var/adm/cron/at.allow existence
# file_object (file_test)
test_1() {
  test -e '/var/adm/cron/at.allow' &>/dev/null
}
# check /var/adm/cron/at.allow is empty
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  ! ( grep -Pq '^([^ 	

]+)[ 	

]*$' '/var/adm/cron/at.allow' &>/dev/null )
}
# check /var/adm/cron/at.allow existence
# file_object (file_test)
test_3() {
  test -e '/var/adm/cron/at.allow' &>/dev/null
}
# check /var/adm/cron/at.allow existence
# file_object (file_test)
test_4() {
  test -e '/var/adm/cron/at.allow' &>/dev/null
}
# check /var/adm/cron/at.allow is not empty
# textfilecontent54_object (textfilecontent54_test)
test_5() {
  ! ( grep -Pq '^([^ 	

]+)[ 	

]*$' '/var/adm/cron/at.allow' &>/dev/null )
}
# check /var/adm/cron/at.allow existence
# file_object (file_test)
test_7() {
  test -e '/var/adm/cron/at.allow' &>/dev/null
}
# check /var/adm/cron/at.deny existence
# file_object (file_test)
test_8() {
  test -e '/var/adm/cron/at.deny' &>/dev/null
}
# default system accounts (other than root) are listed in /var/adm/cron/at.deny
# password_object (password_test)
test_9() {
  ! ( getent passwd .* &>/dev/null )
}

if ( ( test_1 && test_2 ) || ( test_3 && ( test_4 && test_5 ) ) || ( test_7 && ( test_8 && test_9 ) ) ); then
  echo "PASS (automated portion only -- MANUAL REVIEW still required, see notes above)"
else
  echo "FAIL (or see MANUAL REVIEW note above)"
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:187
if [ ! -f "/var/adm/cron/at.allow" ]; then echo "PASS"; exit 0; fi; if [ -s "/var/adm/cron/at.allow" ]; then if ! [ -z "$(grep -v "^$" /var/adm/cron/at.allow | grep -xvE "root|bin|sys|adm")" ]; then echo "FAIL"; exit 1; fi; echo "PASS"; exit 0; fi; echo "PASS"; exit 0

Remediation

Remove the default accounts (such as bin, sys, adm, and others) from the at.allow file.