STIGQter: STIG Summary: Crunchy Data Postgres 16 Security Technical Implementation Guide Version: 1 Release: 3 Benchmark Date: 01 Jul 2026:

PostgreSQL must generate audit records when concurrent logons/connections by the same user from different workstations occur.

DISA Rule

SV-261961r1000888_rule

Vulnerability Number

V-261961

Group Title

SRG-APP-000506-DB-000353

Rule Version

CD16-00-011700

Severity

CAT II

CCI(s)

CCI-000172 - Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3.

Weight

Fix Recommendation

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

To ensure logging is enabled, review supplementary content APPENDIX-C for instructions on enabling logging.

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

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

Edit the following parameters as such:

log_connections = on
log_disconnections = on
log_line_prefix = '< %m %u %d %c: >'

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

As the system administrator, reload the server with the new configuration:

$ sudo systemctl reload postgresql-${PGVER?}

Check Contents

As the database administrator, verify that log_connections and log_disconnections are enabled by running the following SQL:

$ sudo su - postgres
$ psql -c "SHOW log_connections"
$ psql -c "SHOW log_disconnections"

If either is off, this is a finding.

Verify that log_line_prefix contains sufficient information by running the following SQL:

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

If log_line_prefix does not contain at least %m %u %d %c, this is a finding.

Vulnerability Number

V-261961

Documentable

False

Rule Version

CD16-00-011700

Severity Override Guidance

Check Content Reference

Target Key

5598