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UBTU-24-100450 - Ubuntu 24.04 LTS audit event multiplexor must be configured to offload audit logs onto a different system or storage media from the system being audited.

Information

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

Offloading is a common process in information systems with limited audit storage capacity.

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

Solution

Configure the audit event multiplexor to offload audit records to a different system or storage media from the system being audited.

Install the audisp-remote plugin:

$ sudo apt install -y audispd-plugins

Set the audisp-remote plugin as active by editing the "/etc/audit/plugins.d/au-remote.conf" file:

$ sudo sed -i -E 's/active\s*=\s*no/active = yes/' /etc/audit/plugins.d/au-remote.conf

Set the address of the remote machine by editing the "/etc/audit/audisp-remote.conf" file:

$ sudo sed -i -E 's/(remote_server\s*=).*/\1 <remote addr>/' /etc/audit/audisp-remote.conf

where <remote addr> must be substituted by the address of the remote server receiving the audit log.

Make the audit service reload its configuration files:

$ sudo systemctl restart auditd.service

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_CAN_Ubuntu_24-04_LTS_V1R5_STIG.zip

Item Details

Category: AUDIT AND ACCOUNTABILITY

References: 800-53|AU-4(1), CAT|III, CCI|CCI-001851, Rule-ID|SV-270658r1067151_rule, STIG-ID|UBTU-24-100450, Vuln-ID|V-270658

Plugin: Unix

Control ID: 8d69455f2472bb55a131ab9cd034490d1bf91ccbc2b92b06dd63afcaecd07da6