Pete Finnigan's Oracle security weblog

ORA-28050 - Can I drop the SYSTEM User?

Two things most annoy me with the Oracle database in terms of securing it and this is the abundance of default users in most Oracle databases that I perform security audits on and also the massive amount of PUBLIC grants....[Read More]

Posted by Pete On 27/03/20 At 06:11 PM

Setting Users Impossible Passwords BY VALUES and Schema Only Accounts

I plan to try and write some Oracle security based blog posts whilst working from home. These promises when I have made them in the past usually end up not coming true due to other work and things getting more....[Read More]

Posted by Pete On 26/03/20 At 02:38 PM

CoronaVirus - We are Still Open

Everyone must now be affected in some way about coronavirus. We had an inkling that Boris Johnson and his government would enact a more severe lock down in the UK. So in anticipation I decided on Monday that we needed....[Read More]

Posted by Pete On 25/03/20 At 01:27 PM

XS$NULL - Can we login to it and does it really have no privileges?

I have read on line about XS$NULL over the years and particularly the documentation that states that it has no privileges. The documentation states the following: An internal account that represents the absence of a user in a session. Because....[Read More]

Posted by Pete On 17/02/20 At 01:09 PM

Bug Bounty

There has been a rise on bug bounty programs and websites that help researchers find and disclose bugs to website and other owners with the hope of a payout from the owner of the vulnerable wesbsites. Some big well known....[Read More]

Posted by Pete On 11/02/20 At 10:09 AM

PL/SQL Package with no DEFINER or INVOKER rights - Part 2

I posted about a discovery I made whilst testing for an issue in our PL/SQL code analyser checks in PFCLScan last week as I discovered that the AUTHID column in DBA_PROCEDURES or ALL_PROCEDURES or USER_PROCEDURES can be NULL; this caused....[Read More]

Posted by Pete On 28/01/20 At 03:11 PM

PL/SQL That is not DEFINER or INVOKER rights - BUG?

Note: Part 2 - PL/SQL Package with no DEFINER or INVOKER rights - Part 2 is available that takes this investigation further I always understood that PL/SQL objects in the database that are not explicitly changed to INVOKER rights....[Read More]

Posted by Pete On 24/01/20 At 03:19 PM

Installing Oracle 19c on Linux

I needed to create a new 19c install yesterday for a test of some customer software and whilst I love Oracle products I have to say that installing the software and database has never been issue free and simple over....[Read More]

Posted by Pete On 06/12/19 At 04:27 PM