Title

MariaDB must provide a warning to appropriate support staff when allocated audit record storage volume reaches 75 percent of maximum audit record storage capacity. (Cat II impact)

Discussion

Organizations are required to use a central log management system, so, under normal conditions, the audit space allocated to the DBMS on its own server will not be an issue. However, space will still be required on the MariaDB server for audit records in transit, and, under abnormal conditions, this could fill up. Since a requirement exists to halt processing upon audit failure, a service outage would result. If support personnel are not notified immediately upon storage volume utilization reaching 75 percent, they are unable to plan for storage capacity expansion. The appropriate support staff include, at a minimum, the ISSO and the DBA/SA.

Check Content

Review OS, or third-party logging application settings to determine whether a warning will be provided when 75 percent of DBMS audit log storage capacity is reached. If no warning will be provided, this is a finding.

Fix Text

Configure the system to notify appropriate support staff immediately upon storage volume utilization reaching 75 percent. MariaDB does not monitor storage, however, it is possible to monitor storage with a script. ##### Example Monitoring Script #!/bin/bash DATADIR=/var/lib/psql/mysql CURRENT=$(df ${DATADIR?} | grep / | awk '{ print $5}' | sed 's/%//g') THRESHOLD=75 if [ "$CURRENT" -gt "$THRESHOLD" ] ; then mail -s 'Disk Space Alert' mail@support.com << EOF The data directory volume is almost full. Used: $CURRENT %EOF fi Schedule this script in cron to run around the clock.

Additional Identifiers

Rule ID: SV-253728r879732_rule

Vulnerability ID: V-253728

Group Title: SRG-APP-000359-DB-000319

Expert Comments

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