Title

The system must set a maximum audit log file size. (Cat II impact)

Discussion

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.

Check Content

Inspect "/etc/audit/auditd.conf" and locate the following line to determine how much data the system will retain in each audit log file: "# grep max_log_file /etc/audit/auditd.conf" max_log_file = 6 If the system audit data threshold hasn't been properly set up, this is a finding.

Fix Text

Determine the amount of audit data (in megabytes) which should be retained in each log file. Edit the file "/etc/audit/auditd.conf". Add or modify the following line, substituting the correct value for [STOREMB]: max_log_file = [STOREMB] Set the value to "6" (MB) or higher for general-purpose systems. Larger values, of course, support retention of even more audit data.

Additional Identifiers

Rule ID: SV-217948r603264_rule

Vulnerability ID: V-217948

Group Title: SRG-OS-000480

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.