V-233517

Discussion

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.

Check Content

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"), check the permissions of configuration files for the database:

$ sudo su - postgres
$ ls -la ${PGDATA?}

If any files are not owned by the database owner or have permissions allowing others to modify (write) configuration files, this is a finding.

As the server administrator, check the permissions on the shared libraries for PostgreSQL:

$ sudo ls -la /usr/pgsql-${PGVER?} 
$ sudo ls -la /usr/pgsql-${PGVER?}/bin
$ sudo ls -la /usr/pgsql-${PGVER?}/include
$ sudo ls -la /usr/pgsql-${PGVER?}/lib
$ sudo ls -la /usr/pgsql-${PGVER?}/share

If any files are not owned by root or have permissions allowing others to modify (write) configuration files, this is a finding.