EP11-00-008400 - The EDB Postgres Advanced Server must prohibit user installation of logic modules (stored procedures, functions, triggers, views, etc.) without explicit privileged status.
Allowing regular users to install software, without explicit privileges, creates the risk that untested or potentially malicious software will be installed on the system. Explicit privileges (escalated or administrative privileges) provide the regular user with explicit capabilities and control that exceed the rights of a regular user. DBMS functionality and the nature and requirements of databases will vary; so while users are not permitted to install unapproved software, there may be instances where the organization allows the user to install approved software packages such as from an approved software repository. The requirements for production servers will be more restrictive than those used for development and research. The DBMS must enforce software installation by users based upon what types of software installations are permitted (e.g., updates and security patches to existing software) and what types of installations are prohibited (e.g., software whose pedigree with regard to being potentially malicious is unknown or suspect) by the organization. In the case of a database management system, this requirement covers stored procedures, functions, triggers, views, etc. NOTE: Nessus has not performed this check. Please review the benchmark to ensure target compliance.
Document and obtain approval for any non-administrative users who require the ability to create, alter, or replace logic modules. Implement the approved permissions. Revoke (or deny) any unapproved permissions and remove any unauthorized role memberships. Use the REVOKE SQL command to remove privileges from databases and schemas. For example, to revoke create privileges on a database: REVOKE CREATE ON DATABASE <database_name > FROM <role_name>; To revoke create privileges on a database: REVOKE CREATE ON SCHEMA <schema_name> FROM <role_name>;