SV-281055r1165520: RHEL 10 must enforce the audit log directory to have a mode of "0750" or less permissive to prevent unauthorized read access. | Red Hat Enterprise Linux 10 STIG SCAP Benchmark

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Assessment Title

Rule Text

RHEL 10 must enforce the audit log directory to have a mode of "0750" or less permissive to prevent unauthorized read access.

Description

Discussion Text

If users can write to audit logs, audit trails can be modified or destroyed. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029

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

IA Controls

NIST SP 800-53

Not mappedCCI-000162Not mappedCCI-000163Not mappedCCI-000164

References

DPMS Target Red Hat Enterprise Linux 10 DISA DPMS Target Red Hat Enterprise Linux 10 5733

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.rhel10os:def:281055
# RHEL 10 must enforce the audit log directory to have a mode of "0750" or less permissive to prevent unauthorized read access.
# 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:
#   - file_object (file_test) -- audit log directory has mode 0700 or less permissive: no extractor for field "gexec"
#   - file_object (file_test) -- audit log directory has mode 0750 or less permissive: no extractor for field "oread"

# auditd.conf: log_group is set to root or 0
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  (sed -En 's/^\s*log_group\s*=\s*(\S+)\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf') | grep -Pq '^(?:root|0)$'
}
# auditd.conf: log_group is not set (default value is root)
# textfilecontent54_object (textfilecontent54_test)
test_2() {
  ! ( grep -Pq '^\s*log_group\s*=\s*(\S+)\s*(?:#.*)?$' '/etc/audit/auditd.conf' &>/dev/null )
}
# auditd.conf: log_group is set
# textfilecontent54_object (textfilecontent54_test)
test_4() {
  ! ( grep -Pq '^\s*log_group\s*=\s*(\S+)\s*(?:#.*)?$' '/etc/audit/auditd.conf' &>/dev/null )
}
# auditd.conf: log_group is not set to root
# textfilecontent54_object (textfilecontent54_test)
test_5() {
  (sed -En 's/^\s*log_group\s*=\s*(\S+)\s*(?:#.*)?$/\1/p' '/etc/audit/auditd.conf') | grep -Pq '^(?:root|0)$'
}

if ( ( test_1 || test_2 ) || ( test_4 && test_5 ) ); 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.rhel10os:def:281055
if [ ! -f "/etc/audit/auditd.conf" ]; then echo "PASS"; exit 0; fi
grep -q "^\\s*log_group\\s*=\\s*(\\S+)\\s*$" /etc/audit/auditd.conf | grep -qE "^\\s*log_group\\s*=\\s*(root|0)\\s*$" && \
stat -c "%a %A" /var/log/audit | awk '{if ($1 <= 750) print "PASS"; else print "FAIL"}' && echo "PASS" || echo "FAIL"
exit 0

Remediation

Configure RHEL 10 so that the audit log directories have a mode of "0750" or less permissive to prevent unauthorized read access with the following command:

$ sudo chmod 0700 /var/log/audit

Note: The correct permissions are "0700" if the directory is owned by "root"; otherwise, the correct permissions are "0750".

Restart the audit daemon with the following command for the changes to take effect:

$ sudo service auditd restart