SV-204506r958754: The Red Hat Enterprise Linux operating system must be configured to off-load audit logs onto a different system or storage media from the system being audited. | Red Hat Enterprise Linux 7 STIG SCAP Benchmark

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Assessment Title

Rule Text

The Red Hat Enterprise Linux operating system must be configured to off-load audit logs onto a different system or storage media from the system being audited.

Description

Discussion Text

Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. One method of off-loading audit logs in Red Hat Enterprise Linux is with the use of the audisp-remote dameon. Without the configuration of the "au-remote" plugin, the audisp-remote daemon will not off load the logs from the system being audited. Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224

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

IA Controls

NIST SP 800-53

Not mappedCCI-001851SV-95729V-81017

References

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

Checks

DISA STIG (Manual Reference)

Verify the "au-remote" plugin is configured to always off-load audit logs using the audisp-remote daemon:

# cat /etc/audisp/plugins.d/au-remote.conf | grep -v "^#"

active = yes
direction = out
path = /sbin/audisp-remote
type = always
format = string

If "active" is not set to "yes", "direction" is not set to "out", "path" is not set to "/sbin/audisp-remote", "type" is not set to "always", or any of the lines are commented out, ask the System Administrator to indicate how the audit logs are off-loaded to a different system or storage media.

If there is no evidence that the system is configured to off-load audit logs to a different system or storage media, 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:95729
# The Red Hat Enterprise Linux operating system must be configured to off-load audit logs onto a different system or storage media from the system being audited.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies /etc/audisp/plugins.d/au-remote.conf active = yes
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^[ ]*active[ ]+=[ ]+([^ ]*)[ ]*$/\1/p' '/etc/audisp/plugins.d/au-remote.conf') | grep -Pq '^[Yy][Ee][Ss]$'
}
# Verifies /etc/audisp/plugins.d/au-remote.conf direction = out
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  (sed -En 's/^[ ]*direction[ ]+=[ ]+([^ ]*)[ ]*$/\1/p' '/etc/audisp/plugins.d/au-remote.conf') | grep -Pq '^[Oo][Uu][Tt]$'
}
# Verifies /etc/audisp/plugins.d/au-remote.conf path = /sbin/audisp-remote
# textfilecontent54_object (textfilecontent54_test)
test_3() {
  (sed -En 's/^[ ]*path[ ]+=[ ]+([^ ]*)[ ]*$/\1/p' '/etc/audisp/plugins.d/au-remote.conf') | grep -Pq '^\/sbin\/audisp\-remote$'
}
# Verifies /etc/audisp/plugins.d/au-remote.conf type = always
# textfilecontent54_object (textfilecontent54_test)
test_4() {
  (sed -En 's/^[ ]*type[ ]+=[ ]+([^ ]*)[ ]*$/\1/p' '/etc/audisp/plugins.d/au-remote.conf') | grep -Pq '^[Aa][Ll][Ww][Aa][Yy][Ss]$'
}

if ( test_1 && test_2 && test_3 && test_4 ); 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:mil.disa.stig.rhel7:def:95729

if grep -qE "^[ ]*active[ ]+=[ ]+([^ ]*)[ ]*$" /etc/audisp/plugins.d/au-remote.conf && \
   grep -qE "^[ ]*active[ ]+=[ ]+yes[ ]*$" /etc/audisp/plugins.d/au-remote.conf && \
   grep -qE "^[ ]*direction[ ]+=[ ]+([^ ]*)[ ]*$" /etc/audisp/plugins.d/au-remote.conf && \
   grep -qE "^[ ]*direction[ ]+=[ ]+out[ ]*$" /etc/audisp/plugins.d/au-remote.conf && \
   grep -qE "^[ ]*path[ ]+=[ ]+([^ ]*)[ ]*$" /etc/audisp/plugins.d/au-remote.conf && \
   grep -qE "^[ ]*path[ ]+=[ ]+/sbin/audisp-remote[ ]*$" /etc/audisp/plugins.d/au-remote.conf && \
   grep -qE "^[ ]*type[ ]+=[ ]+([^ ]*)[ ]*$" /etc/audisp/plugins.d/au-remote.conf && \
   grep -qE "^[ ]*type[ ]+=[ ]+always[ ]*$" /etc/audisp/plugins.d/au-remote.conf; then
   echo "PASS"
   exit 0
else
   echo "FAIL"
   exit 1
fi

Remediation

Edit the /etc/audisp/plugins.d/au-remote.conf file and add or update the following values:

active = yes
direction = out
path = /sbin/audisp-remote
type = always

The audit daemon must be restarted for changes to take effect:

# service auditd restart