Title

The SUSE operating system auditd service must notify the System Administrator (SA) and Information System Security Officer (ISSO) immediately when audit storage capacity is 75 percent full. (Cat II impact)

Discussion

If security personnel are not notified immediately when storage volume reaches 75 percent utilization, they are unable to plan for audit record storage capacity expansion.

Check Content

Determine if the SUSE operating system auditd is configured to notify the System Administrator (SA) and Information System Security Officer (ISSO) when the audit record storage volume reaches 75 percent of the storage capacity. Check the system configuration to determine the partition to which audit records are written using the following command: # grep -iw log_file /etc/audit/auditd.conf log_file = /var/log/audit/audit.log Check the size of the partition to which audit records are written (e.g., "/var/log/audit/"): # df -h /var/log/audit/ 0.9G /var/log/audit If the audit records are not being written to a partition specifically created for audit records (in this example "/var/log/audit" is a separate partition), use the following command to determine the amount of space other files in the partition currently occupy: # du -sh <partition> 1.8G /var Determine the threshold for the system to take action when 75 percent of the repository maximum audit record storage capacity is reached: # grep -iw space_left /etc/audit/auditd.conf space_left = 225 If the value of the "space_left" keyword is not set to 25 percent of the total partition size, this is a finding.

Fix Text

Check the system configuration to determine the partition to which the audit records are written: # grep -iw log_file /etc/audit/auditd.conf Determine the size of the partition to which audit records are written (e.g., "/var/log/audit/"): # df -h /var/log/audit/ Set the value of the "space_left" keyword in "/etc/audit/auditd.conf" to 25 percent of the partition size.

Additional Identifiers

Rule ID: SV-217193r877389_rule

Vulnerability ID: V-217193

Group Title: SRG-OS-000343-GPOS-00134

Expert Comments

CCIs tied to check.

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