The system must retain enough rotated audit logs to cover the required log retention period.

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The system must retain enough rotated audit logs to cover the required log retention period.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-51043	OL6-00-000159	SV-65249r1_rule		Medium

Description
The total storage for audit log files must be large enough to retain log information over the period required. This is a function of the maximum log file size and the number of logs retained.

STIG	Date
Oracle Linux 6 Security Technical Implementation Guide	2018-03-01

Details

Check Text ( C-53481r1_chk )
Inspect "/etc/audit/auditd.conf" and locate the following line to determine how many logs the system is configured to retain after rotation: "# grep num_logs /etc/audit/auditd.conf" num_logs = 5 If the overall system log file(s) retention hasn't been properly set up, this is a finding.

Fix Text (F-55849r1_fix)
Determine how many log files "auditd" should retain when it rotates logs. Edit the file "/etc/audit/auditd.conf". Add or modify the following line, substituting [NUMLOGS] with the correct value: num_logs = [NUMLOGS] Set the value to 5 for general-purpose systems. Note that values less than 2 result in no log rotation.