Unused database components, EDB Postgres Advanced Server software, and database objects must be removed.

Information systems are capable of providing a wide variety of functions and services. Some of the functions and services, provided by default, may not be necessary to support essential organizational operations (e.g., key missions, functions).

It is detrimental for software products to provide, or install by default, functionality exceeding requirements or mission objectives.

DBMSs must adhere to the principles of least functionality by providing only essential capabilities.

Review the list of components and features installed with the database.

If unused components are installed and are not documented and authorized, this is a finding.

RPM can also be used to check what is installed:

> yum list installed | grep edb-

This returns EDB database packages that have been installed. If any packages displayed by this command are not being used, this is a finding.

Review the EDB Postgres Advanced Server packages available in the installation guide here: https://www.enterprisedb.com/docs/epas/<version number>/

Uninstall all packages that are not required by running the following as the "root" user:

> yum erase -y <package-name>

At a minimum, the edb-as<version>-server-* packages are required. Additionally, other packages such as pem, jdbc, postgis, pgpool, and others may be required by applications that need the functionality provided in these additional packages.