Vulnerability Discussion

The auditd service does not include the ability to send audit records to a centralized server for management directly. However, it can use a plug-in for audit event multiplexor (audispd) to pass audit records to the local syslog server.

Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224

Check

Verify Amazon Linux 2023 off-loads audit records onto a different system with the following command:

$ more /etc/systemd/journal-upload.conf
[Upload]
URL=192.168.21.2
ServerKeyFile=/etc/ssl/private/journal-upload.pem
ServerCertificateFile=/etc/ssl/certs/journal-upload.pem
TrustedCertificateFile=/etc/ssl/ca/trusted.pem

If all of the entries do not have values, are commented out, or are missing, this is a finding.

Fix

Configure Amazon Linux 2023 to off-load audit records onto a different system or media from the system being audited.

If using systemd-journal-upload:
Edit "/etc/systemd/journal-upload.conf" with the appropriate configuration:

[Upload]
URL=https://[server.domain]:[port]