Query goal: | Find routine privileges that the carrier of the privilege can in turn grant to others, i.e., the privileges have been given WITH GRANT OPTION. The number of privileges that can be passed on should be as small as possible. |
Notes about the query: | There could be multiple routines with the same name but with different parameters in the same schema (overloading). Thus, for the unique identification of the routine it is necessary to present also its parameters in addition to the schema name and routine name. The query excludes privileges that have been given to superusers because they have the privilege in any case. |
Query type: | Problem detection (Each row in the result could represent a flaw in the design) |
Query reliability: | High (Few or no false-positive results) |
Query license: | MIT License |
Fixing suggestion: | Revoke WITH GRANT OPTION privilege. |
Data source: | INFORMATION_SCHEMA+system catalog |
SQL query: | Click on query to copy it
SELECT rp.grantee, rp.specific_schema AS routine_schema, rp.routine_name, pg_get_function_identity_arguments(translate(substring(rp.specific_name,'_[0-9]+$'),'_','')::int::oid) AS parameters, rp.privilege_type FROM information_schema.routine_privileges AS rp INNER JOIN information_schema.routines AS t USING (specific_schema, specific_name) WHERE rp.is_grantable='YES' AND rp.specific_schema <>ALL (SELECT schema_name FROM INFORMATION_SCHEMA.schemata WHERE schema_name<>'public' AND schema_owner='postgres' AND schema_name IS NOT NULL) AND NOT EXISTS (SELECT 1 FROM pg_catalog.pg_roles r WHERE rolsuper=TRUE AND rp.grantee=r.rolname) ORDER BY specific_schema, specific_name; |
SQL query | Description |
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WITH grantable_privileges AS ( SELECT rp.grantee, rp.specific_schema AS routine_schema, rp.routine_name, pg_get_function_identity_arguments(translate(substring(rp.specific_name,'_[0-9]+$'),'_','')::int::oid) AS parameters, rp.privilege_type FROM information_schema.routine_privileges AS rp INNER JOIN information_schema.routines AS t USING (specific_schema, specific_name) WHERE rp.is_grantable='YES' AND rp.specific_schema <>ALL (SELECT schema_name FROM INFORMATION_SCHEMA.schemata WHERE schema_name<>'public' AND schema_owner='postgres' AND schema_name IS NOT NULL) AND NOT EXISTS (SELECT 1 FROM pg_catalog.pg_roles r WHERE rolsuper=TRUE AND rp.grantee=r.rolname)) SELECT format('REVOKE GRANT OPTION FOR ALL PRIVILEGES ON ROUTINE %1$I.%2$I(%3$s) FROM %4$I;', routine_schema, routine_name, parameters, grantee) AS statements FROM grantable_privileges ORDER BY routine_schema, routine_name; | Revoke WITH GRANT OPTION privilege. |
Collection name | Collection description |
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Find problems automatically | Queries, that results point to problems in the database. Each query in the collection produces an initial assessment. However, a human reviewer has the final say as to whether there is a problem or not . |
Category name | Category description |
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Security | Queries of this category provide information about the security measures. |
User-defined routines | Queries of this category provide information about the user-defined routines |
Reference |
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https://en.wikipedia.org/wiki/Principle_of_least_privilege |
https://www.postgresql.org/docs/current/ddl-priv.html |