SV-204507r958754: The Red Hat Enterprise Linux operating system must take appropriate action when the remote logging buffer is full. | Red Hat Enterprise Linux 7 STIG SCAP Benchmark

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Assessment Title

Rule Text

The Red Hat Enterprise Linux operating system must take appropriate action when the remote logging buffer is full.

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. When the remote buffer is full, audit logs will not be collected and sent to the central log server. 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-001851V-81019SV-95731

References

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

Checks

DISA STIG (Manual Reference)

Verify the audisp daemon is configured to take an appropriate action when the internal queue is full:

# grep "overflow_action" /etc/audisp/audispd.conf

overflow_action = syslog

If the "overflow_action" option is not "syslog", "single", or "halt", or the line is commented out, ask the System Administrator to indicate how the audit logs are off-loaded to a different system or storage media, and to indicate what action that system takes when the internal queue is full.

If there is no evidence the system is configured to off-load audit logs to a different system or storage media or, if the configuration does not take appropriate action when the internal queue is full, 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:95731
# The Red Hat Enterprise Linux operating system must take appropriate action when the remote logging buffer is full.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# overflow_action in /etc/audisp/audispd.conf is set to syslog, single, or halt
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/(?i)^\s*overflow_action[ ]*=[ ]*([\w]+)\s*/\1/p' '/etc/audisp/audispd.conf') | grep -Pq '(?i)^syslog|single|halt$'
}

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.stig.rhel7:def:95731
if [ ! -f "/etc/audisp/audispd.conf" ]; then echo "PASS"; exit 0; fi
if grep -qE "(?i)^\\s*overflow_action[ ]*=[ ]*syslog|single|halt\\s*$" /etc/audisp/audispd.conf; then echo "PASS"; exit 0; fi
echo "FAIL"; exit 1

Remediation

Edit the /etc/audisp/audispd.conf file and add or update the "overflow_action" option:

overflow_action = syslog

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

# service auditd restart