PGS9-00-009900 - The system must provide a warning to appropriate support staff when allocated audit record storage volume reaches 75% of maximum audit record storage capacity - alert

Information

Organizations are required to use a central log management system, so, under normal conditions, the audit space allocated to PostgreSQL on its own server will not be an issue. However, space will still be required on PostgreSQL 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%, they are unable to plan for storage capacity expansion.

The appropriate support staff include, at a minimum, the ISSO and the DBA/SA.

NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.

Solution

Note: The following instructions use the PGDATA and PGVER environment variables. See supplementary content APPENDIX-F for instructions on configuring PGDATA and APPENDIX-H for PGVER.

Configure the system to notify appropriate support staff immediately upon storage volume utilization reaching 75%.

PostgreSQL does not monitor storage, however, it is possible to monitor storage with a script.

##### Example Monitoring Script

#!/bin/bash

PGDATA=/var/lib/psql/${PGVER?}/data
CURRENT=$(df ${PGDATA?} | grep / | awk '{ print $5}' | sed 's/%//g')
THRESHOLD=75

if [ '$CURRENT' -gt '$THRESHOLD' ] ; then
mail -s 'Disk Space Alert' [email protected] << EOF
The data directory volume is almost full. Used: $CURRENT
%EOF
fi

Schedule this script in cron to run around the clock.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_PGS_SQL_9-x_V2R2_STIG.zip

Item Details

Category: AUDIT AND ACCOUNTABILITY

References: 800-53|AU-5(1), CAT|II, CCI|CCI-001855, Rule-ID|SV-214133r508027_rule, STIG-ID|PGS9-00-009900, STIG-Legacy|SV-87675, STIG-Legacy|V-73023, Vuln-ID|V-214133

Plugin: Unix

Control ID: 61b9e5b384450870eb5193fc2be3782e0f604540626d665b1ea572fd0aada20e