CIS Ubuntu 14.04 LTS - 4.1.1.1 Ensure audit log storage size is configured

4.1.1.1 Ensure audit log storage size is configured (Not Scored)

Profile Applicability

• Level 2 - Server
• Level 2 - Workstation

Description

Configure the maximum size of the audit log file. Once the log reaches the maximum size, it will be rotated and a new log file will be started.

Rationale

It is important that an appropriate size is determined for log files so that they do not impact the system and audit data is not lost.

Audit Procedure

Run the following command and ensure output is in compliance with site policy:

grep max_log_file /etc/audit/auditd.conf

Expected Result

max_log_file = <MB>

The output should show max_log_file set to a value in accordance with site policy.

Remediation

Set the following parameter in /etc/audit/auditd.conf in accordance with site policy:

max_log_file = <MB>

Notes: The max_log_file parameter is measured in megabytes.

Default Value

By default, auditd will max out the log files at 5MB and retain only 4 copies of them.

References

1. CIS Controls v6.1 - 6.3 Ensure Audit Logging Systems Are Not Subject To Loss

Profile

• Level 2 - Server
• Level 2 - Workstation