Security Basics mailing list archives

Exploiting MS Access with SQL Injections


From: Stealth <stealth.infared () gmail com>
Date: Mon, 11 Jul 2011 14:01:07 -0700

Alright, so I'm pentesting this box running Windows Server 2003 with
Microsoft Access as the backend database. It interfaces with this DB via
the ColdFusion that the app is programmed with (.cfm). The debug error
messages print out not just the SQL query, but with the surrounding CFM
code as well as a stack trace, and there are SQL injections riddled all
throughout the site.

I've never played with MS Access, but I figured this would be
ridiculously simple. I quickly figured out that it doesn't allow SQL
code to be executed after the end of a statement ";", which took out a
lot of exploits. So I decided to poke around some more, possibly map out
the tables/db's, however almost all of the techniques I knew failed with
strange Syntax errors I wasn't familiar with. Various attempts at
researching possible techniques for MS Access resulted in the server
acting far differently than I was expecting.

I looked into this for a solid 3 hours before deciding to try and see if
I could find assistance with various DB-exploit programs. I pulled out
Sqlmap, and it successfully registered the exploit as a valid injection.
But as soon as I try to pass any flags for pulling information to
Sqlmap, I get various forms of "This doesn't work with Microsoft
Access". The only thing I can get SQLmap to do without crashing is
return the database fingerprint, which I obviously already knew. I'm
thinking this isn't limitations of the program, but that these
techniques just don't work on MS Access.

Anyone have any ideas for how I can progress this exploit? The coder
obviously didn't account for SQL Injection, but I'm thinking there isn't
anything I can really do here. If anyone has any material to
read/techniques to try, I'd be grateful.

Thanks guys


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