O112-P3-006200 - The DBMS must protect against an individual using a group account from falsely denying having performed a particular action.

Information

Non-repudiation of actions taken is required in order to maintain application integrity. Examples of particular actions taken by individuals include creating information, sending a message, approving information (e.g., indicating concurrence or signing a contract), and receiving a message.

Non-repudiation protects individuals against later claims by an author of not having authored a particular document, a sender of not having transmitted a message, a receiver of not having received a message, or a signatory of not having signed a document.

Group authentication does not provide individual accountability for actions taken on the DBMS or data. Whenever a single database account is used to connect to the database, a secondary authentication method that provides individual accountability is required. This scenario most frequently occurs when an externally hosted application authenticates individual users to the application and the application uses a single account to retrieve or update database information on behalf of the individual users.

When group accounts are utilized without another means of identifying individual users, users may deny having performed a particular action.

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.

Solution

Use accounts assigned to individual users where feasible. Configure DBMS to provide individual accountability at the DBMS level, and in audit logs, for actions performed under a shared database account.

Modify applications and data tables that are not capturing individual user identity to do so.

Create and enforce the use of individual user IDs for logging on to Oracle tools and third-party products.

If Oracle (or third-party) auditing is not already enabled, enable it. For Oracle auditing, use this query:
ALTER SYSTEM SET AUDIT_TRAIL=<audit trail type> SCOPE=SPFILE;
Audit trail type can be 'OS', 'DB', 'DB,EXTENDED', 'XML' or 'XML,EXTENDED'.
After executing this statement, it may be necessary to shut down and restart the Oracle database.

For more information on the configuration of auditing, please refer to 'Auditing Database Activity' in the Oracle Database 2 Day + Security Guide:
http://docs.oracle.com/cd/E11882_01/server.112/e10575/tdpsg_auditing.htm
and 'Verifying Security Access with Auditing' in the Oracle Database Security Guide: http://docs.oracle.com/cd/E11882_01/network.112/e36292/auditing.htm#DBSEG006
and '27 DBMS_AUDIT_MGMT' in the Oracle Database PL/SQL Packages and Types Reference:
http://docs.oracle.com/cd/E11882_01/appdev.112/e40758/d_audit_mgmt.htm

If the site-specific audit requirements are not covered by the default audit options, deploy and configure Fine-Grained Auditing. For details, refer to Oracle documentation, at the locations above.

If this level of auditing does not meet site-specific requirements, consider deploying the Oracle Audit Vault. The Audit Vault is a highly configurable option from Oracle made specifically for performing the audit functions. It has reporting capabilities as well as user-defined rules that provide additional flexibility for complex auditing requirements.

Item Details

Audit Name: DISA STIG Oracle 11.2g v2r5 Database

Category: AUDIT AND ACCOUNTABILITY

Plugin: OracleDB

Control ID: 83aed1878ff923183bd9b2dfb09138ea8804dd835cedbfe9cf327764b6560efc

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O112-P3-006200 - The DBMS must protect against an individual using a group account from falsely denying having performed a particular action.

Information

Solution

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Item Details