PPS9-00-007510 - Execution of software modules (to include stored procedures, functions, and triggers) with elevated privileges must be restricted to necessary cases only.

Information

In certain situations, to provide required functionality, a DBMS needs to execute internal logic (stored procedures, functions, triggers, etc.) and/or external code modules with elevated privileges. However, if the privileges required for execution are at a higher level than the privileges assigned to organizational users invoking the functionality applications/programs, those users are indirectly provided with greater privileges than assigned by organizations.

Privilege elevation must be utilized only where necessary and protected from misuse.

This calls for inspection of application source code, which will require collaboration with the application developers. It is recognized that in many cases, the database administrator (DBA) is organizationally separate from the application developers, and may have limited, if any, access to source code. Nevertheless, protections of this type are so important to the secure operation of databases that they must not be ignored. At a minimum, the DBA must attempt to obtain assurances from the development organization that this issue has been addressed, and must document what has been discovered.

NOTE: Nessus has provided the target output to assist in reviewing the benchmark to ensure target compliance.

Solution

Determine where, when, how, and by what principals/subjects elevated privilege is needed.

Modify the system and the application(s) using the database to ensure privilege elevation is used only as required.

To alter a user to not allow bypassing RLS, execute the following SQL:

ALTER USER <user> NOBYPASSRLS;

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_EDB_PGS_Advanced_Server_v9-6_V2R3_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-6(8), CAT|II, CCI|CCI-002233, Rule-ID|SV-213619r879719_rule, STIG-ID|PPS9-00-007510, STIG-Legacy|SV-83595, STIG-Legacy|V-68991, Vuln-ID|V-213619

Plugin: PostgreSQLDB

Control ID: 0e372d26a001604ef4b1c3a0ecdb905688a8a03db915f386393b938b4e749354