I have enables sql acl on our databrick cluster and I am trying to deny any slect on one table from my personal user using below commands
%sql
REVOKE ALL PRIVILEGES on database default from `myuser#org.com`;
REVOKE ALL PRIVILEGES on default.billingsilver from `myuser#org.com`;
deny SELECT ON ANY FILE to `myuser#org.com`;
deny select on database default to `myuser#org.com`;
deny select on default.billingsilver to `myuser#org.com`;
show grant on default.billingsilver;
The result of above is as follow:
But when I run below commands
%sql
select count(*) from default.billingsilver;
I still can get the count from above table while this should deny me from running the query.
Please noe that I have logged in using myuser#org.com which belongs to admins in the group folder.
Can someone tell me why I still can get the count while I have denied all select on both database and the table?
There is no ActionType OWN, in your privileges means the object does not have an owner.
To perform this GRANT, DENY (SQL operations) operations some privileges are required.
`DENY`: `OWN` on the object.
To perform this you should be the owner of the object, make sure you are the owner of the object.
Reference: Operations and privileges
Related
While exploring cassandra, Is it possible in cassandra that if I created an user "test" and I have multiple keypsaces so if I am logging cqlsh with "test" then I can see only selected keyspaces not others.admin can view or switch all keypsaces. please help if any idea or correct me.
Thanks in advance.
Permissions (Data Control)
https://docs.scylladb.com/operating-scylla/security/authorization/#data-control
Permission Resource Operations
AUTHORIZE ALL KEYSPACES GRANT PERMISSION and REVOKE PERMISSION on any table
AUTHORIZE KEYSPACE GRANT PERMISSION and REVOKE PERMISSION on any table in specified keyspace
AUTHORIZE TABLE GRANT PERMISSION and REVOKE PERMISSION on specified table
GRANT permissions
https://docs.scylladb.com/operating-scylla/security/authorization/#grant-permission
AND / OR
RBAC (Role Based Access Control)
https://docs.scylladb.com/operating-scylla/security/authorization/#database-roles
Will be a good way of accomplishing what you are aiming for
GRANT command should work.
Though test user will be able to see other keyspaces, operation will not be possible unless given permission.
If test user has SELECT grant on particular keyspace it will be able to only issue select query on tables in that keyspace.
https://docs.datastax.com/en/cql/3.3/cql/cql_reference/cqlGrant.html
I have below questions about schema/privilege:
May User have multiple DB roles(schema)?
What is db_denydatareader used for? (it seems can have different DB roles among databases, right?)
What are difference between db_datareader and db_denydatawriter if only want user to read data in particular database?
I tried to revoke SELECT right from schema (TestUser is with default schema db_datareader), why can it still search for tables?
REVOKE SELECT ON SCHEMA::db_datareader TO TestUser;
How can I grant select and update permissions to few tables only to user but not all tables? (i.e. no delete and insert permissions)
What are these system privileges referring to as I could not find in sys.objects table?
select * from sys.database_permissions where major_id <= 0;
Thanks.
It seems you think schemas and roles are the same but they are not the same. Roles are security membership containers, a principal can be member of a role. Schemas contain database schema bound objects, they help to group database objects together, and are owned by a principal. When you create a new user you can choose his default schema, add him to certain roles, and grant him ownership of schemas.
Members of the db_denydatareader fixed database role cannot read any data in the user tables within a database.
About the difference between db_datareader and db_denydatawriter. The db_datareader grants select permissions on all tables, and It does not affect any insert, update, delete permissions. Meanwhile db_denydatawriter denies insert, update and delete permissions on all tables, it denies permission to do any changes to any table. Even if someone was granted insert permissions directly they would still not be able to insert, because deny overrules grant. Assigning a user to the db_denydatawriter role means that they will never be able to make any changes to the database, regardless of what other permissions they have. Deny takes precedence over grant.
About question #4, you can group tables on schemas and then DENY SELECT permission over the schema to a principal or user. db_datareader is a fixed database role and it is not a schema.
DENY SELECT ON schema::[SchemaName] TO [user_name]
Similarly you can grant SELECT and UPDATE permissions over an schema on the database, that contains a group of tables.
GRANT SELECT, UPDATE on SCHEMA::SchemaName TO [user_name]
You can find the list of database roles here.
Small question about Cassandra 3.0.8. Not datastax.
is it possible to grant/revoke permissions for users, who use sstableloader? For now, user only authenticate in Cassandra and can update any table...
There is no specific authentication for just sstableloader. However you can
Create separate set of users/roles for each and every table within the keyspace.
In other words, there could be different users with different set of permissions on each and every table.
Here is an example on how to create user and define permission at table level
GRANT SELECT PERMISSIONS ON keyspace1.table1 TO USER1;
GRANT MODIFY PERMISSIONS ON keyspace1.table2 TO USER1;
So in the above example USER1 has select permission on table1 while update permission on table2. So you can authorize who gets to have update access on table1 but not if it comes from sstableloader or cql or application code.
Here is the reference for roles and permissions https://docs.datastax.com/en/cql/3.1/cql/cql_reference/grant_r.html
I have two databases on the same SQL2008 server, and many stored procedures on one database (call it A) need to access the tables on the other database (B). I made sure the SQL user on A had permission to EXEC the procedure on A, but I also ran DENY ALL ON mytablename to attempt a touch of security. I am being dumb somewhere though...
I get this error when running myproc on A:
Microsoft OLE DB Provider for ODBC Drivers error '80040e09'
[Microsoft][ODBC SQL Server Driver][SQL Server]The SELECT permission was denied on the object 'mytablename', database 'B', schema 'dbo'.
Whilst I could GRANT SELECT access to the tables in question this isn't really the solution, is it?! I'd like the procs on either database to have SELECT access to the tables, without the user being able to SELECT from the tables directly.
Database A has:
Table - mytablename
User - myuserA (member of db_datareader, linked to a login called 'bob')
Database B has:
Proc - myproc (which SELECTs from A..mytablename)
User - myuserB (member of db_datareader, linked to same login 'bob')
I realise we really need a DBA, but we only have two employees!
By running DENY ALL ON table, you are effectively denying permissions regardless if you explicitly grant SELECT. DENY trumps all.
What you want to do is then create views on Database B, and grant SELECT to the users who can run the SP on Database A. Security will propagate from DB A to DB B when the SP on DB A is run.
I need to give read only permission to a couple of users on the database so that they can get an understanding of the schema, logic in SPs, etc. But I do not want them to modify anything. I tried assigning the db_datareader role but it doesn't allow viewing SP name or code. What is the right role-combination to do this or do I need to write a T-SQL script to achieve this?
Assuming you want to grant the rights to view everything under the dbo schema:
GRANT VIEW DEFINITION ON schema::dbo TO [UserName]
I believe you will have to write a TSQL script to grant view on the SP's. DB_DataReader only gives read access to the user tables; it doesn't include any other rights. And I know of no included database role or server role that will do what you are asking.