Detections
Analytics

EPAS-00-000800 - The EDB Postgres Advanced Server must enforce approved authorizations for logical access to information and system resources in accordance with applicable access control policies.

Information

Authentication with a DOD-approved PKI certificate does not necessarily imply authorization to access the DBMS. To mitigate the risk of unauthorized access to sensitive information by entities that have been issued certificates by DOD-approved PKIs, all DOD systems, including databases, must be properly configured to implement access control policies.

Successful authentication must not automatically give an entity access to an asset or security boundary. Authorization procedures and controls must be implemented to ensure each authenticated entity also has a validated and current authorization. Authorization is the process of determining whether an entity, once authenticated, is permitted to access a specific asset. Information systems use access control policies and enforcement mechanisms to implement this requirement.

Access control policies include identity-based policies, role-based policies, and attribute-based policies. Access enforcement mechanisms include access control lists, access control matrices, and cryptography. These policies and mechanisms must be employed by the application to control access between users (or processes acting on behalf of users) and objects (e.g., devices, files, records, processes, programs, and domains) in the information system.

This requirement is applicable to access control enforcement applications, a category that includes database management systems. If the DBMS does not follow applicable policy when approving access, it may be in conflict with networks or other applications in the information system. This may result in users either gaining or being denied access inappropriately and in conflict with applicable policy.

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

Solution

To determine current user access to database objects, run the following as the 'enterprisedb' operating system user:

> psql edb -c 'SELECT grantee, privilege_type, table_name FROM information_schema.role_table_grants WHERE grantee='<username>''

Use GRANT, REVOKE, and ALTER statements to add and/or remove permissions on server-level securables, bringing them in line with the documented requirements.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_EPAS_V2R1_STIG.zip

Item Details

Category: ACCESS CONTROL

References: 800-53|AC-3, CAT|I, CCI|CCI-000213, Rule-ID|SV-259212r960792_rule, STIG-ID|EPAS-00-000800, Vuln-ID|V-259212

Plugin: Unix

Control ID: 220bf1d9f9b474447f39922096df76963ed1d4c76273d2c1cf465691ee621cb3