PGS9-00-000700 - Privileges to change PostgreSQL software modules must be limited - binary objects

Details

If the system were to allow any user to make changes to software libraries, those changes might be implemented without undergoing the appropriate testing and approvals that are part of a robust change management process.



Accordingly, only qualified and authorized individuals must be allowed to obtain access to information system components for purposes of initiating changes, including upgrades and modifications.



Unmanaged changes that occur to the database software libraries or configuration can lead to unauthorized or compromised installations.


Solution

Note: The following instructions use the PGDATA and PGVER environment variables. See supplementary content APPENDIX-F for instructions on configuring PGDATA and APPENDIX-H for PGVER.

As the database administrator (shown here as 'postgres'), change the ownership and permissions of configuration files in PGDATA:

$ sudo su - postgres
$ chown postgres:postgres ${PGDATA?}/postgresql.conf
$ chmod 0600 ${PGDATA?}/postgresql.conf

As the server administrator, change the ownership and permissions of shared objects in /usr/pgsql-${PGVER?}/*.so

$ sudo chown root:root /usr/pgsql-${PGVER?}/lib/*.so
$ sudo chmod 0755 /usr/pgsql-${PGVER?}/lib/*.so

As the service administrator, change the ownership and permissions of executables in /usr/pgsql-${PGVER?}/bin:

$ sudo chown root:root /usr/pgsql-${PGVER?}/bin/*
$ sudo chmod 0755 /usr/pgsql-${PGVER?}/bin/*


Supportive Information

The following resource is also helpful.

This security hardening control applies to the following category of controls within NIST 800-53: Configuration Management.This control applies to the following type of system Unix.


References


Source