SV-274079r1210985: Amazon Linux 2023 must encrypt, via the OpenSSL TLS (ossl) driver, the transfer of audit records off-loaded onto a different system or media from the system being audited by rsyslog. | Amazon Linux 2023 STIG SCAP Benchmark

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Assessment Title

Rule Text

Amazon Linux 2023 must encrypt, via the OpenSSL TLS (ossl) driver, the transfer of audit records off-loaded onto a different system or media from the system being audited by rsyslog.

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. Support for both internet and Unix domain sockets enables this utility to support both local and remote logging. Coupling this utility with "ossl" (a secure communications library implementing the SSL and TLS protocols) creates a method to securely encrypt and off-load auditing.

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

IA Controls

NIST SP 800-53

Not mappedCCI-001851

References

DPMS Target Amazon Linux 2023 DISA DPMS Target Amazon Linux 2023 5700

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.amzlx23os:def:274079
# Amazon Linux 2023 must encrypt, via the OpenSSL TLS (ossl) driver, the transfer of audit records off-loaded onto a different system or media from the system being audited by rsyslog.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# DefaultNetstreamDriver == ossl
# textfilecontent54_object (textfilecontent54_test)
test_1() {
  ( (sed -En 's/^\$DefaultNetstreamDriver\s+(\S+)\s*$/\1/p' '/etc/rsyslog.conf') | grep -qxF 'ossl' ) || ( (grep -rhP --include='*.conf' '^\$DefaultNetstreamDriver\s+(\S+)\s*$' '/etc/rsyslog.d' | sed -En 's/^\$DefaultNetstreamDriver\s+(\S+)\s*$/\1/p') | grep -qxF 'ossl' )
}

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:mil.disa.stig.amzlx23os:def:274079
if [ ! -f "/etc/rsyslog.conf" ]; then echo "PASS"; exit 0; fi
if grep -q "^\\$DefaultNetstreamDriver\\s+ossl\\s*$" /etc/rsyslog.conf; then echo "PASS"; exit 0; fi
if [ ! -d "/etc/rsyslog.d" ]; then echo "PASS"; exit 0; fi
for file in /etc/rsyslog.d/*.conf; do
    if grep -q "^\\$DefaultNetstreamDriver\\s+ossl\\s*$" "$file"; then echo "PASS"; exit 0; fi
done
echo "FAIL"; exit 1

Remediation

Configure Amazon Linux 2023 to use the OpenSSL TLS driver (ossl) to encrypt offloaded audit records by setting the following options in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf":

$DefaultNetstreamDriver ossl