STIGQter: STIG Summary: Crunchy Data PostgreSQL Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 20 Nov 2020:

PostgreSQL must generate audit records when unsuccessful attempts to add privileges/permissions occur.

DISA Rule

SV-233576r617333_rule

Vulnerability Number

V-233576

Group Title

SRG-APP-000495-DB-000327

Rule Version

CD12-00-006900

Severity

CAT II

CCI(s)

• CCI-000172 - The information system generates audit records for the events defined in AU-2 d. with the content defined in AU-3.

Weight

10

Fix Recommendation

Configure PostgreSQL to produce audit records when unsuccessful attempts to add privileges occur.

All denials are logged by default if logging is enabled. To ensure logging is enabled, review supplementary content APPENDIX-C for instructions on enabling logging.

Check Contents

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"), create a role "bob" and a test table by running the following SQL:

$ sudo su - postgres
$ psql -c "CREATE ROLE bob; CREATE TABLE test(id INT);"

Next, set current role to "bob" and attempt to modify privileges:

$ psql -c "SET ROLE bob; GRANT ALL PRIVILEGES ON test TO bob;"

Next, as the database administrator (shown here as "postgres"), verify the unsuccessful attempt was logged:

$ sudo su - postgres
$ cat ${PGDATA?}/${PGLOG?}/<latest_log>
2016-07-14 18:12:23.208 EDT postgres postgres ERROR: permission denied for relation test
2016-07-14 18:12:23.208 EDT postgres postgres STATEMENT: GRANT ALL PRIVILEGES ON test TO bob;

If audit logs are not generated when unsuccessful attempts to add privileges/permissions occur, this is a finding.

Vulnerability Number

V-233576

Documentable

False

Rule Version

CD12-00-006900

Severity Override Guidance

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"), create a role "bob" and a test table by running the following SQL:

$ sudo su - postgres
$ psql -c "CREATE ROLE bob; CREATE TABLE test(id INT);"

Next, set current role to "bob" and attempt to modify privileges:

$ psql -c "SET ROLE bob; GRANT ALL PRIVILEGES ON test TO bob;"

Next, as the database administrator (shown here as "postgres"), verify the unsuccessful attempt was logged:

$ sudo su - postgres
$ cat ${PGDATA?}/${PGLOG?}/<latest_log>
2016-07-14 18:12:23.208 EDT postgres postgres ERROR: permission denied for relation test
2016-07-14 18:12:23.208 EDT postgres postgres STATEMENT: GRANT ALL PRIVILEGES ON test TO bob;

If audit logs are not generated when unsuccessful attempts to add privileges/permissions occur, this is a finding.

Check Content Reference

M

Target Key

5254

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