Title

The audit system must alert the SA when the audit storage volume approaches its capacity. (Cat II impact)

Discussion

An accurate and current audit trail is essential for maintaining a record of system activity. If the system fails, the SA must be notified and must take prompt action to correct the problem. Minimally, the system must log this event and the SA will receive this notification during the daily system log review. If feasible, active alerting (such as email or paging) should be employed consistent with the site’s established operations management systems and procedures.

Check Content

Verify the presence of an audit_warn entry in /etc/mail/aliases. # grep audit_warn /etc/mail/aliases If there is no audit_warn entry in /etc/mail/aliases, this is a finding. Verify the minfree parameter in /etc/security/audit_control. # egrep '^minfree:' /etc/security/audit_control If the minfree parameter is set to zero or not set at all, this is a finding.

Fix Text

If necessary, add an audit_warn alias to /etc/mail/aliases that will forward to designated system administrator(s). # vi /etc/mail/aliases Put the updated aliases file into service. # newaliases If necessary, add or update the minfree: parameter in /etc/security/audit_control. # vi /etc/security/audit_control Ensure the minfree value is greater than zero and less than 100.

Additional Identifiers

Rule ID: SV-40564r1_rule

Vulnerability ID: V-22375

Group Title:

Expert Comments

CCIs tied to check.

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