AlmaLinux OS 9 must encrypt, via the gtls driver, the transfer of audit records offloaded onto a different system or media from the system being audited via rsyslog.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-269515	ALMA-09-052820	SV-269515r1050398_rule		Medium

Description

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.

STIG	Date
CloudLinux AlmaLinux OS 9 Security Technical Implementation Guide	2025-05-22

Details

Check Text (C-73546r1049902_chk)

Verify AlmaLinux OS 9 uses the gtls driver to encrypt audit records offloaded onto a different system or media from the system being audited with the following command:

$ grep -i '$DefaultNetstreamDriver' /etc/rsyslog.conf /etc/rsyslog.d/*.conf

/etc/rsyslog.d/stig.conf:$DefaultNetstreamDriver gtls

If the value of the "$DefaultNetstreamDriver" option is not set to "gtls" or the line is commented out, this is a finding.

Fix Text (F-73447r1049903_fix)

Configure AlmaLinux OS 9 to use the gtls driver to encrypt offloaded audit records by setting the following options in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf":

$DefaultNetstreamDriver gtls