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

When invalid inputs are received, PostgreSQL must behave in a predictable and documented manner that reflects organizational and system objectives.

DISA Rule

SV-261934r1000807_rule

Vulnerability Number

V-261934

Group Title

SRG-APP-000447-DB-000393

Rule Version

CD16-00-009000

Severity

CAT II

CCI(s)

• CCI-002754 - Verify that the system behaves in a predictable and documented manner that reflects organizational and system objectives when invalid inputs are received.

Weight

10

Fix Recommendation

Enable logging.

To ensure logging is enabled, see the instructions in the supplementary content APPENDIX-C.

All errors and denials are logged if logging is enabled.

Check Contents

Review system documentation to determine how input errors from application to PostgreSQL are to be handled in general and if any special handling is defined for specific circumstances.

If it does not implement the documented behavior, this is a finding.

As the database administrator (shown here as "postgres"), make a small SQL syntax error in psql by running the following:

$ sudo su - postgres
$ psql -c "CREAT TABLE incorrect_syntax(id INT)"
ERROR: syntax error at or near "CREAT"

Note: The following instructions use the PGVER and PGLOG environment variables. Refer to supplementary content APPENDIX-H for instructions on configuring PGVER and APPENDIX-I for PGLOG.

As the database administrator (shown here as "postgres"), verify the syntax error was logged (change the log file name and part to suit the circumstances):

$ sudo su - postgres
$ cat ~/${PGVER?}/data/${PGLOG?}/<latest log>
2024-03-30 16:18:10.772 EDT postgres postgres 5706bb87.90dERROR: syntax error at or near "CREAT" at character 1
2024-03-30 16:18:10.772 EDT postgres postgres 5706bb87.90dSTATEMENT: CREAT TABLE incorrect_syntax(id INT);

If no matching log entry containing the 'ERROR: syntax error' is present, this is a finding.

Vulnerability Number

V-261934

Documentable

False

Rule Version

CD16-00-009000

Severity Override Guidance

Review system documentation to determine how input errors from application to PostgreSQL are to be handled in general and if any special handling is defined for specific circumstances.

If it does not implement the documented behavior, this is a finding.

As the database administrator (shown here as "postgres"), make a small SQL syntax error in psql by running the following:

$ sudo su - postgres
$ psql -c "CREAT TABLE incorrect_syntax(id INT)"
ERROR: syntax error at or near "CREAT"

Note: The following instructions use the PGVER and PGLOG environment variables. Refer to supplementary content APPENDIX-H for instructions on configuring PGVER and APPENDIX-I for PGLOG.

As the database administrator (shown here as "postgres"), verify the syntax error was logged (change the log file name and part to suit the circumstances):

$ sudo su - postgres
$ cat ~/${PGVER?}/data/${PGLOG?}/<latest log>
2024-03-30 16:18:10.772 EDT postgres postgres 5706bb87.90dERROR: syntax error at or near "CREAT" at character 1
2024-03-30 16:18:10.772 EDT postgres postgres 5706bb87.90dSTATEMENT: CREAT TABLE incorrect_syntax(id INT);

If no matching log entry containing the 'ERROR: syntax error' is present, this is a finding.

Check Content Reference

M

Target Key

5598