I saw a good thread yesterday morning on comp.databases.oracle.server where the poster wanted to know if it is possible to create a read-only table. Some great ideas were suggested, from the basics of restricting privileges, triggers to capture the changes, DDL triggers even a great idea involving disable validate constraint. This stops DML from taking place. There was also a suggestion from Howard Rogers about using a read only tablespace and a read-only datafile. Some of the ideas involving triggers have issues as sqlldr can bypass the triggers. I suggested some ideas on grants and also to use Row Level Security. It seems from this very interesting thread that its almost impossible to make a table truly read only for a long period of time. It is possible to do it over shorter periods if users can be prevented from making silent changes to reverse the read-only status. This potential functionality could be a useful addition for Oracle to consider in the future, true read only tables.
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Pete Finnigan's Oracle Security Weblog
This is the weblog for Pete Finnigan. Pete works in the area of Oracle security and he specialises in auditing Oracle databases for security issues. This weblog is aimed squarely at those interested in the security of their Oracle databases.
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October 2004
- find_all_privs.sql : A script to find all privileges allocated to a user or role - 10/02/2004 by 10/02/2004
- PeteFinnigan.com Tools page updated - 10/03/2004 by 10/03/2004
- who_has_role.sql : A script to find which users and roles have been granted a role - 10/05/2004 by 10/05/2004
- Howard Rogers writes about Virtual Private databases - 10/06/2004 by 10/06/2004
- Tools page has been updated again - 10/07/2004 by 10/07/2004
- who_has_priv.sql : script to find user who have been granted a system privilege - 10/09/2004 by 10/09/2004
- Oracle remids all customers to apply Patches for alert #68 - 10/10/2004 by 10/10/2004
- preventing password leakage with SQL*Loader - 10/11/2004 by 10/11/2004
- which special characters can be used in Oracle database passwords - 10/12/2004 by 10/12/2004
- expired passwords, ORA-01045 and password changes - 10/13/2004 by 10/13/2004
- SQL Injection papers - 10/14/2004 by 10/14/2004
- where is the next monthly patch? - 10/15/2004 by 10/15/2004
- computerworld have also picked up the patch quickly story - 10/16/2004 by 10/16/2004
- Listener security guide - 10/17/2004 by 10/17/2004
- A tuning book and security? - 10/18/2004 by 10/18/2004
- An interesting SQL Injection paper - 10/19/2004 by 10/19/2004
- Internetnews article : "Customers Gripe About Oracle's Patch Plan" - 10/20/2004 by 10/20/2004
- Auditing DBA's? - 10/21/2004 by 10/21/2004
- You can search inside the SANS Oracle security step-by-step guide - 10/22/2004 by 10/22/2004
- Is setting trace a security risk? - part 1 - 10/23/2004 by 10/23/2004
- technewsworld.com says "Oracle's Security Luck Runs Out" - 10/24/2004 by 10/24/2004
- Another issue with alert 68 on AIX 32 bit - 10/25/2004 by 10/25/2004
- Writing to the alert log - 10/26/2004 by 10/26/2004
- more info on DBMS_SYSTEM.KSDWRT - 10/27/2004 by 10/27/2004
- massive data theft from a database in California - 10/28/2004 by 10/28/2004
- Can I connect to the database as the user PUBLIC? - 10/29/2004 by 10/29/2004
- Interesting question about Sarbanes-Oxley on Oracle 7.3.3 - 10/30/2004 by 10/30/2004
- Howard Rogers new paper on secure application roles - 10/31/2004 by 10/31/2004
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