UBTU-24-901380 Ubuntu 24.04 LTS must be configured so that the audit log directory is not write-accessible by unauthorized users.
All changes in this version
Maps to AU-9 via CCI-000164
Title
Ubuntu 24.04 LTS must be configured so that the audit log directory is not write-accessible by unauthorized users.
Control
Verify that the audit log directory has a mode of "0750" or less permissive. Determine where the audit logs are stored with the following command: $ sudo grep -iw ^log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log Using the path of the directory containing the audit logs, determine if the directory has a mode of "0750" or less with the following command: $ sudo stat -c "%n %a" /var/log/audit /var/log/audit 750 If the audit log directory has a mode more permissive than "0750", this is a finding.
Discussion
If audit information were to become compromised, then forensic analysis and discovery of the true source of potentially malicious system activity is impossible to achieve. To ensure the veracity of audit information, Ubuntu 24.04 LTS must protect audit information from unauthorized deletion. This requirement can be achieved through multiple methods, which will depend upon system architecture and design. Audit information includes all information (e.g., audit records, audit settings, audit reports) needed to successfully audit information system activity.
Related controls
CCI-000164
Fix
Configure the audit log directory to have a mode of "0750" or less permissive. Determine where the audit logs are stored with the following command: $ sudo grep -iw ^log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log Using the path of the directory containing the audit logs, configure the audit log directory to have a mode of "0750" or less permissive by using the following command: $ sudo chmod -R 750 /var/log/audit