Amazon Linux 2023 must encrypt the transfer of audit records off-loaded onto a different system or media from the system being audited via rsyslog.

STIG ID: AZLX-23-002070  |  SRG: SRG-OS-000479-GPOS-00224 |  Severity: medium (CAT II)  |  CCI: CCI-001851 |  Vulnerability Id: V-274078

Vulnerability Discussion

Information stored in one location is vulnerable to accidental or incidental deletion or alteration.

Check

Verify Amazon Linux 2023 encrypts audit records off-loaded onto a different system or media from the system being audited via rsyslog with the following command:

$ sudo grep -i '$ActionSendStreamDriverMode' /etc/rsyslog.conf /etc/rsyslog.d/*.conf
/etc/rsyslog.conf:$ActionSendStreamDriverMode 1

If the value of the "$ActionSendStreamDriverMode" option is not set to "1" or the line is commented out, this is a finding.

Fix

Configure Amazon Linux 2023 to encrypt off-loaded audit records via rsyslog by setting the following options in "/etc/rsyslog.conf" or "/etc/rsyslog.d/[customfile].conf":

$ActionSendStreamDriverMode 1
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