STIGQter: STIG Summary: PostgreSQL 9.x Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

PostgreSQL must generate audit records when unsuccessful attempts to execute privileged activities or other system-level access occur.

DISA Rule

SV-214106r508027_rule

Vulnerability Number

V-214106

Group Title

SRG-APP-000504-DB-000355

Rule Version

PGS9-00-006500

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 execute privileged SQL.

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

Check Contents

As the database administrator (shown here as "postgres"), create the role bob by running the following SQL:

$ sudo su - postgres
$ psql -c "CREATE ROLE bob"

Next, change the current role to bob and attempt to execute privileged activity:

$ psql -c "CREATE ROLE stig_test SUPERUSER"
$ psql -c "CREATE ROLE stig_test CREATEDB"
$ psql -c "CREATE ROLE stig_test CREATEROLE"
$ psql -c "CREATE ROLE stig_test CREATEUSER"

Now, as the database administrator (shown here as "postgres"), verify that an audit event was produced (use the latest log):

$ sudo su - postgres
$ cat ${PGDATA?}/pg_log/<latest_log>
< 2016-02-23 20:16:32.396 EST postgres 56cfa74f.79eb postgres: >ERROR: must be superuser to create superusers
< 2016-02-23 20:16:32.396 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test SUPERUSER;
< 2016-02-23 20:16:48.725 EST postgres 56cfa74f.79eb postgres: >ERROR: permission denied to create role
< 2016-02-23 20:16:48.725 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test CREATEDB;
< 2016-02-23 20:16:54.365 EST postgres 56cfa74f.79eb postgres: >ERROR: permission denied to create role
< 2016-02-23 20:16:54.365 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test CREATEROLE;
< 2016-02-23 20:17:05.949 EST postgres 56cfa74f.79eb postgres: >ERROR: must be superuser to create superusers
< 2016-02-23 20:17:05.949 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test CREATEUSER;

If audit records are not produced, this is a finding.

Vulnerability Number

V-214106

Documentable

False

Rule Version

PGS9-00-006500

Severity Override Guidance

As the database administrator (shown here as "postgres"), create the role bob by running the following SQL:

$ sudo su - postgres
$ psql -c "CREATE ROLE bob"

Next, change the current role to bob and attempt to execute privileged activity:

$ psql -c "CREATE ROLE stig_test SUPERUSER"
$ psql -c "CREATE ROLE stig_test CREATEDB"
$ psql -c "CREATE ROLE stig_test CREATEROLE"
$ psql -c "CREATE ROLE stig_test CREATEUSER"

Now, as the database administrator (shown here as "postgres"), verify that an audit event was produced (use the latest log):

$ sudo su - postgres
$ cat ${PGDATA?}/pg_log/<latest_log>
< 2016-02-23 20:16:32.396 EST postgres 56cfa74f.79eb postgres: >ERROR: must be superuser to create superusers
< 2016-02-23 20:16:32.396 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test SUPERUSER;
< 2016-02-23 20:16:48.725 EST postgres 56cfa74f.79eb postgres: >ERROR: permission denied to create role
< 2016-02-23 20:16:48.725 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test CREATEDB;
< 2016-02-23 20:16:54.365 EST postgres 56cfa74f.79eb postgres: >ERROR: permission denied to create role
< 2016-02-23 20:16:54.365 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test CREATEROLE;
< 2016-02-23 20:17:05.949 EST postgres 56cfa74f.79eb postgres: >ERROR: must be superuser to create superusers
< 2016-02-23 20:17:05.949 EST postgres 56cfa74f.79eb postgres: >STATEMENT: CREATE ROLE stig_test CREATEUSER;

If audit records are not produced, this is a finding.

Check Content Reference

M

Target Key

3994

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