|Finding ID||Version||Rule ID||IA Controls||Severity|
|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.|
|Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide||2022-12-06|
|Check Text ( C-20887r853366_chk )|
| Verify the audit event multiplexor is configured to off-load audit records to a different system or storage media from the system being audited. |
Check that audisp-remote plugin is installed:
# sudo dpkg -s audispd-plugins
If status is "not installed", verify that another method to off-load audit logs has been implemented.
Check that the records are being off-loaded to a remote server with the following command:
# sudo grep -i active /etc/audisp/plugins.d/au-remote.conf
active = yes
If "active" is not set to "yes", or the line is commented out, ask the System Administrator to indicate how the audit logs are off-loaded to a different system or storage media.
If there is no evidence that the system is configured to off-load audit logs to a different system or storage media, this is a finding.
|Fix Text (F-20886r304815_fix)|
| Configure the audit event multiplexor to off-load audit records to a different system or storage media from the system being audited. |
Install the audisp-remote plugin:
# sudo apt-get install audispd-plugins -y
Set the audisp-remote plugin as active, by editing the /etc/audisp/plugins.d/au-remote.conf file:
# sudo sed -i -E 's/active\s*=\s*no/active = yes/' /etc/audisp/plugins.d/au-remote.conf
Set the address of the remote machine, by editing the /etc/audisp/audisp-remote.conf file:
# sudo sed -i -E 's/(remote_server\s*=).*/\1
Make the audit service reload its configuration files:
# sudo systemctl restart auditd.service