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PostgreSQL must generate audit records when successful accesses to objects occur.


Overview

Finding ID Version Rule ID IA Controls Severity
V-73067 PGS9-00-012600 SV-87719r1_rule Medium
Description
Without tracking all or selected types of access to all or selected objects (tables, views, procedures, functions, etc.), it would be difficult to establish, correlate, and investigate the events relating to an incident, or identify those responsible for one. In an SQL environment, types of access include, but are not necessarily limited to: SELECT INSERT UPDATE DELETE EXECUTE
STIG Date
PostgreSQL 9.x Security Technical Implementation Guide 2017-12-27

Details

Check Text ( C-73201r1_chk )
As the database administrator, verify pgaudit is enabled by running the following SQL:

$ sudo su - postgres
$ psql -c "SHOW shared_preload_libraries"

If the output does not contain "pgaudit", this is a finding.

Verify that role, read, write, and ddl auditing are enabled:

$ psql -c "SHOW pgaudit.log"

If the output does not contain read and write, this is a finding.
Fix Text (F-79513r1_fix)
Note: The following instructions use the PGDATA environment variable. See supplementary content APPENDIX-F for instructions on configuring PGDATA. To ensure that logging is enabled, review supplementary content APPENDIX-C for instructions on enabling logging.

If logging is enabled the following configurations must be made to log unsuccessful connections, date/time, username and session identifier.

As the database administrator (shown here as "postgres"), edit postgresql.conf:

$ sudo su - postgres
$ vi ${PGDATA?}/postgresql.conf

Edit the following parameters:

log_connections = on
log_line_prefix = '< %m %u %c: >'
pgaudit.log = 'read, write'

Where:
* %m is the time and date
* %u is the username
* %c is the session ID for the connection

Now, as the system administrator, reload the server with the new configuration:

# SYSTEMD SERVER ONLY
$ sudo systemctl reload postgresql-9.5

# INITD SERVER ONLY
$ sudo service postgresql-9.5 reload