Entries tagged with “OUG”.


Well, that was fun. I had a great time at UKOUG at Birmingham. Met friends, enjoyed the parties and gave a SQL Injection security presentation. All in all, I think it went well – no demos crashing, etc.

It’s pretty much the same presentation I gave at in the hacking exposed series so you can download it here with all the scripts and the demo app.

Presentation Attendies

Presentation Attendies

I had a great time at RMOUG this year. Did one of my usual presentation about attack vectors on the database and how to defend against them. I think the presentation was well received and the attendees loved the demos – I mostly just demonstrate instead of going through slides.

One of my favorite demos is what I call “from nothing to DBA in 5 simple steps”.
Basically, I start with finding databases (using tools like nmap), guessing the SID, enumerating the usernames, attacking the password and then running one of the privilege escalation attacks. Of course, there are many other options, including attacking the listener instead or sniffing the network but I find that this demo usually sets the right mood for the rest of the presentation.

In some of my next posts, I’m going to publish some of the scripts I wrote for the above demo starting with a nice little script to enumerate and guess Oracle service names.

A picture of people arriving before the presentation (click to see the full picture)…

People arriving to the presentation

People arriving to my presentation

Ah, finally home after 10 days of travel. I attended the UKOUG event in Birmingham and did a database security presentation and participated in a security round table. I also attended very interesting presentations by Pete Finnigan and Paul Wright.

One noteworthy presentation was called Breaking Oracle which showed how to create scenarios where the Oracle database crashes or spins. I thought that some of the examples in the presentation were major security issues that allow users to crash or spin Oracle with very simple queries.
Please don’t try this on your database –
select 1 from dual where regexp_like(‘ ‘,’^*[ ]*a’);
Or this:
SQL> create table t2(col1 varchar2(60));
SQL> create table t1(c1 varchar2(60),
c2 varchar2(1),
c3 varchar2(60),
c4 varchar2(60));
SQL> explain plan for
select 1 from t1 a, t2 b ,t1 c
where b.col1 = ‘xxslc_department’
and a.c1 not between c.c3 and c.c4
start with a.c2=’p’
connect by prior a.c1 between a.c3 and a.c4;

I thought long and hard about what I was going to present during this conference. I did not want to do the usual stuff of unsecure/default passwords, securing the listener or applying patches. I wanted to present something that would give the attendees a real call-to-action they could take with them immediately after the conference. So, I decided to do something simple that would demonstrate SQL injection on a made-up function and show how you should protect this function. Also, I wanted to show how DBAs could find such vulnerable code in the database and fix it.

(more…)