SV-204397r982216: The Red Hat Enterprise Linux operating system must uniquely identify and must authenticate users using multifactor authentication via a graphical user logon. | Red Hat Enterprise Linux 7 STIG SCAP Benchmark

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Assessment Title

Rule Text

The Red Hat Enterprise Linux operating system must uniquely identify and must authenticate users using multifactor authentication via a graphical user logon.

Description

Discussion Text

To assure accountability and prevent unauthenticated access, users must be identified and authenticated to prevent potential misuse and compromise of the system. Multifactor solutions that require devices separate from information systems gaining access include, for example, hardware tokens providing time-based or challenge-response authenticators and smart cards such as the U.S. Government Personal Identity Verification card and the DoD Common Access Card. Satisfies: SRG-OS-000375-GPOS-00161,SRG-OS-000375-GPOS-00162

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

IA Controls

NIST SP 800-53

Not mappedCCI-001948Not mappedCCI-001953Not mappedCCI-001954V-77819SV-92515

References

DPMS Target Red Hat Enterprise Linux 7 DISA DPMS Target Red Hat Enterprise Linux 7 2899

Checks

DISA STIG (Manual Reference)

Verify the operating system uniquely identifies and authenticates users using multifactor authentication via a graphical user logon.

Note: If the system does not have GNOME installed, this requirement is Not Applicable. 

Determine which profile the system database is using with the following command:

# grep system-db /etc/dconf/profile/user

system-db:local

Note: The example is using the database local for the system, so the path is "/etc/dconf/db/local.d". This path must be modified if a database other than local is being used.

# grep enable-smartcard-authentication /etc/dconf/db/local.d/*

enable-smartcard-authentication=true

If "enable-smartcard-authentication" is set to "false" or the keyword is missing, 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.stig.rhel7:def:92515
# The Red Hat Enterprise Linux operating system must uniquely identify and must authenticate users using multifactor authentication via a graphical user logon.
# 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) -- enable-smartcard-authentication is set to true: no extractor for field "subexpression"
#   - textfilecontent54_object (textfilecontent54_test) -- enable-smartcard-authentication is not set to false: no extractor for field "subexpression"

# package dconf is installed
# rpminfo_object (rpminfo_test)
test_1() {
  rpm -q --quiet 'dconf' &>/dev/null
}
# package dconf is installed
# rpminfo_object (rpminfo_test)
test_2() {
  rpm -q --quiet 'dconf' &>/dev/null
}
# dconf user profile exists
# textfilecontent54_object (textfilecontent54_test)
test_3() {
  grep -Pq '^user-db:user\nsystem-db:local$' '/etc/dconf/profile/user' &>/dev/null
}

if ( test_1 || ( test_2 || test_3 ) ); 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:mil.disa.stig.rhel7:def:92515

if ! command -v rpm &> /dev/null; then
  echo "Not Applicable"
  exit 0
fi

if ! rpm -qa | grep -q dconf; then
  echo "FAIL"
  exit 1
fi

if [ ! -d "/etc/dconf/db/local.d" ]; then
  mkdir -p /etc/dconf/db/local.d
fi

if [ ! -f "/etc/dconf/db/local.d/00-defaults" ]; then
  touch /etc/dconf/db/local.d/00-defaults
fi

if grep -q "^user-db:user\nsystem-db:local$" /etc/dconf/profile/user; then
  : # do nothing
else
  echo "FAIL"
  exit 1
fi

if grep -r -l -o "^enable-smartcard-authentication=true$" /etc/dconf/db/local.d/* &> /dev/null; then
  : # do nothing
else
  echo "FAIL"
  exit 1
fi

echo "PASS"
exit 0

Remediation

Configure the operating system to uniquely identify and authenticate users using multifactor authentication via a graphical user logon.

Note: If the system does not have GNOME installed, this requirement is Not Applicable.

Create a database to contain the system-wide screensaver settings (if it does not already exist) with the following command: 

Note: The example is using the database local for the system, so if the system is using another database in "/etc/dconf/profile/user", the file should be created under the appropriate subdirectory.

# touch /etc/dconf/db/local.d/00-defaults

Edit "[org/gnome/login-screen]" and add or update the following line:
enable-smartcard-authentication=true   

Update the system databases:
# dconf update