PostgreSQL must generate audit records when successful logons or connections occur.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-233558	SRG-APP-000503-DB-000350	CD12-00-005100	SV-233558r961824_rule	2024-08-27	3

Description
For completeness of forensic analysis, it is necessary to track who/what (a user or other principal) logs on to PostgreSQL.

ℹ️ Check
Note: The following instructions use the PGDATA and PGLOG environment variables. See supplementary content APPENDIX-F for instructions on configuring PGDATA and APPENDIX-I for PGLOG. First, as the database administrator (shown here as "postgres"), check if log_connections is enabled by running the following SQL: $ sudo su - postgres $ psql -c "SHOW log_connections" If log_connections is off, this is a finding. Next, verify the logs that the previous connection to the database was logged: $ sudo su - postgres $ cat ${PGDATA?}/${PGLOG?}/<latest_log> < 2016-02-16 15:54:03.934 EST postgres postgres 56c64b8b.aeb: >LOG: connection authorized: user=postgres database=postgres If an audit record is not generated each time a user (or other principal) logs on or connects to PostgreSQL, this is a finding.

ℹ️ Check

Note: The following instructions use the PGDATA and PGLOG environment variables. See supplementary content APPENDIX-F for instructions on configuring PGDATA and APPENDIX-I for PGLOG. First, as the database administrator (shown here as "postgres"), check if log_connections is enabled by running the following SQL: $ sudo su - postgres $ psql -c "SHOW log_connections" If log_connections is off, this is a finding. Next, verify the logs that the previous connection to the database was logged: $ sudo su - postgres $ cat ${PGDATA?}/${PGLOG?}/<latest_log> < 2016-02-16 15:54:03.934 EST postgres postgres 56c64b8b.aeb: >LOG: connection authorized: user=postgres database=postgres If an audit record is not generated each time a user (or other principal) logs on or connects to PostgreSQL, this is a finding.

✔️ Fix
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. 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 connections, date/time, username, and session identifier. First, 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_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 Now, as the system administrator, reload the server with the new configuration: $ sudo systemctl reload postgresql-${PGVER?}

✔️ Fix

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. 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 connections, date/time, username, and session identifier. First, 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_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 Now, as the system administrator, reload the server with the new configuration: $ sudo systemctl reload postgresql-${PGVER?}