Management Configuration of user roles and permissions

In the actual production process, roles are widely used. What is a role? A role is a set of permissions that can be authorized to users or roles to control user access and behavior to objects. When creating a user, do you want to authorize the DBA role to it for the sake of greed? In fact, this is a very risky behavior. You can think about

In the actual production process, roles are widely used. What is a role? A role is a set of permissions that can be authorized to users or roles to control user access and behavior to objects. When creating a user, do you want to authorize the DBA role to it for the sake of greed? In fact, this is a very risky behavior. You can think about

In the actual production process, roles are widely used. What is a role?

A role is a set of permissions that can be authorized to users or roles to control user access and behavior to objects.

When creating a user, do you want to authorize the DBA role to it for the sake of greed? In fact, this is a very risky behavior.

You can think about the following two questions:

1. What permissions does the connect and resource role have?

2. How can I query the roles of a user?

What permissions does the connect and resource roles have?

You can use the DBA_SYS_PRIVES view to query

We can see that by assigning the connect and resource roles to users, we can meet the needs of general users.

Therefore, we can also easily query specific permissions based on the PRIVILEGE field, and then grant permissions to the user based on the corresponding role, so as to control the permissions.

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SQL> select * from dba_sys_privs where GRANTEE = 'dba ';

GRANTEE PRIVILEGE ADM
-------------------------------------------------------------------------
DBA CHANGE NOTIFICATION YES
DBA ADMINISTER ANY SQL TUNING SET YES
DBA ALTER ANY SQL PROFILE YES
DBA CREATE RULE YES
DBA EXPORT FULL DATABASE YES
DBA EXECUTE ANY EVALUATION CONTEXT YES
DBA DEQUEUE ANY QUEUE YES
DBA DROP ANY INDEXTYPE YES
DBA ALTER ANY INDEXTYPE YES
DBA EXECUTE ANY LIBRARY YES
DBA CREATE ANY LIBRARY YES
DBA CREATE ANY DIRECTORY YES
DBA ALTER PROFILE YES
DBA EXECUTE ANY PROCEDURE YES
DBA CREATE ROLE YES
DBA SELECT ANY SEQUENCE YES
DBA DROP ANY INDEX YES
DBA UPDATE ANY TABLE YES
DBA INSERT ANY TABLE YES
DBA SELECT ANY TABLE YES
DBA DROP ROLLBACK SEGMENT YES
DBA BECOME USER YES
DBA DROP TABLESPACE YES
DBA ALTER SESSION YES
DBA CREATE SESSION YES
DBA ANALYZE ANY DICTIONARY YES
DBA ALTER ANY RULE SET YES
DBA CREATE RULE SET YES
DBA DEBUG ANY PROCEDURE YES
DBA CREATE DIMENSION YES
DBA ALTER ANY LIBRARY YES
DBA UNDER ANY TYPE YES
DBA DROP ANY MATERIALIZED VIEW YES
DBA DROP ANY TRIGGER YES
DBA ALTER ANY PROCEDURE YES
DBA FORCE ANY TRANSACTION YES
DBA ALTER DATABASE YES
DBA DELETE ANY TABLE YES
DBA ALTER ROLLBACK SEGMENT YES
DBA EXECUTE ANY PROGRAM YES
DBA EXECUTE ANY RULE YES
DBA IMPORT FULL DATABASE YES
DBA EXECUTE ANY RULE SET YES
DBA CREATE ANY RULE SET YES
DBA FLASHBACK ANY TABLE YES
DBA RESUMABLE YES
DBA ADMINISTER DATABASE TRIGGER YES
DBA CREATE ANY OUTLINE YES
DBA ALTER ANY DIMENSION YES
DBA CREATE ANY DIMENSION YES
DBA EXECUTE ANY OPERATOR YES
DBA CREATE TYPE YES
DBA CREATE TRIGGER YES
DBA GRANT ANY ROLE YES
DBA DROP ANY VIEW YES
DBA CREATE VIEW YES
DBA LOCK ANY TABLE YES
DBA ALTER USER YES
DBA CREATE USER YES
DBA ALTER TABLESPACE YES
DBA CREATE TABLESPACE YES
DBA RESTRICTED SESSION YES
DBA CREATE ANY JOB YES
DBA CREATE JOB YES
DBA CREATE ANY RULE YES
DBA DROP ANY EVALUATION CONTEXT YES
DBA CREATE ANY EVALUATION CONTEXT YES
DBA CREATE EVALUATION CONTEXT YES
DBA GRANT ANY OBJECT PRIVILEGE YES
DBA SELECT ANY DICTIONARY YES
DBA DROP ANY DIMENSION YES
DBA UNDER ANY TABLE YES
DBA CREATE INDEXTYPE YES
DBA CREATE ANY OPERATOR YES
DBA DROP ANY LIBRARY YES
DBA ANALYZE ANY YES
DBA ALTER ANY ROLE YES
DBA CREATE ANY SEQUENCE YES
DBA CREATE ANY INDEX YES
DBA CREATE ANY TABLE YES
DBA MANAGE FILE GROUP YES
DBA MANAGE SCHEDULER YES
DBA ADMINISTER RESOURCE MANAGER YES
DBA ALTER ANY OUTLINE YES
DBA DROP ANY CONTEXT YES
DBA EXECUTE ANY INDEXTYPE YES
DBA UNDER ANY VIEW YES
DBA DROP ANY TYPE YES
DBA ALTER ANY TYPE YES
DBA ALTER ANY MATERIALIZED VIEW YES
DBA CREATE PROFILE YES
DBA DROP PUBLIC DATABASE LINK YES
DBA ALTER ANY INDEX YES
DBA CREATE CLUSTER YES
DBA COMMENT ANY TABLE YES
DBA DROP ANY TABLE YES
DBA CREATE ROLLBACK SEGMENT YES
DBA AUDIT SYSTEM YES
DBA ALTER SYSTEM YES
DBA MANAGE ANY FILE GROUP YES
DBA EXECUTE ANY CLASS YES
DBA DROP ANY RULE SET YES
DBA DEBUG CONNECT SESSION YES
DBA ON COMMIT REFRESH YES
DBA ENQUEUE ANY QUEUE YES
DBA CREATE ANY INDEXTYPE YES
DBA CREATE ANY TYPE YES
DBA DROP ANY DIRECTORY YES
DBA ALTER RESOURCE COST YES
DBA CREATE ANY PROCEDURE YES
DBA CREATE PROCEDURE YES
DBA FORCE TRANSACTION YES
DBA ALTER ANY SEQUENCE YES
DBA CREATE SEQUENCE YES
DBA CREATE ANY VIEW YES
DBA DROP PUBLIC SYNONYM YES
DBA DROP ANY SYNONYM YES
DBA CREATE ANY CLUSTER YES
DBA BACKUP ANY TABLE YES
DBA CREATE TABLE YES
DBA ADMINISTER SQL TUNING SET YES
DBA MERGE ANY VIEW YES
DBA DROP ANY OUTLINE YES
DBA CREATE OPERATOR YES
DBA CREATE LIBRARY YES
DBA GRANT ANY PRIVILEGE YES
DBA DROP PROFILE YES
DBA ALTER ANY TRIGGER YES
DBA CREATE ANY TRIGGER YES
DBA DROP ANY PROCEDURE YES
DBA AUDIT ANY YES
DBA DROP ANY ROLE YES
DBA DROP ANY SEQUENCE YES
DBA CREATE PUBLIC SYNONYM YES
DBA CREATE SYNONYM YES
DBA DROP ANY CLUSTER YES
DBA ALTER ANY TABLE YES
DBA CREATE EXTERNAL JOB YES
DBA READ ANY FILE GROUP YES
DBA CREATE ANY SQL PROFILE YES
DBA DROP ANY SQL PROFILE YES
DBA SELECT ANY TRANSACTION YES
DBA ADVISOR YES
DBA DROP ANY RULE YES
DBA ALTER ANY RULE YES
DBA ALTER ANY EVALUATION CONTEXT YES
DBA CREATE ANY CONTEXT YES
DBA MANAGE ANY QUEUE YES
DBA GLOBAL QUERY REWRITE YES
DBA QUERY REWRITE YES
DBA DROP ANY OPERATOR YES
DBA EXECUTE ANY TYPE YES
DBA CREATE ANY MATERIALIZED VIEW YES
DBA CREATE MATERIALIZED VIEW YES
DBA CREATE PUBLIC DATABASE LINK YES
DBA CREATE DATABASE LINK YES
DBA CREATE ANY SYNONYM YES
DBA ALTER ANY CLUSTER YES
DBA DROP USER YES
DBA MANAGE TABLESPACE YES

160 rows selected.

++

This means that the permissions of the DBA role are very large, so do not authorize the DBA role to users other than the administrator.

How can I query the roles of a user?

You can use the DBA_ROLE_PRIVS view to query

SQL> create user t1 account unlock identified by t1;

User created.

SQL> create user t2 account unlock identified by t2;

User created.

SQL> grant connect, resource to t2;

Grant succeeded.

SQL> grant dba to t1;

Grant succeeded.

The following describes permission control through simple instances:

T1 users have DBA roles, while T2 users only have the most basic roles. Now T2 users have read-only permissions on all tables of T1:

SQL> connect t1/t1
Connected.
SQL> create table t1 (id number );

Table created.

SQL> grant SELECT ANY table to t2;

Grant succeeded.

SQL> connect t2/t2
Connected.
SQL> select * from t1.t1;

No rows selected

SQL> drop table t1.t1;
Drop table t1.t1
*
ERROR at line 1:
ORA-01031: insufficient privileges

SQL> delete from t1.t1;
Delete from t1.t1
*
ERROR at line 1:
ORA-01031: insufficient privileges

If you want to implement other permissions, you can use the DBA_SYS_PRIVS.PRIVILEGE field to grant permissions.

Therefore, if you are worried that tables, stored procedures, or serial numbers of production users are maliciously modified by other users, you can create a separate query user, grant the read-only permission of the table, stored procedure, and serial number of the production user to query the user. This greatly reduces the risks of production.

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