Re: Oracle <= 9i / 10g File System Access via utl_file Exploit Dec 21 2006 09:39AM
Marco Ivaldi (raptor 0xdeadbeef info)
Hey Bugtraq,

Just a quick clarification about the recently posted code.

On Wed, 20 Dec 2006, sumit kumar soni wrote:

> HI, I don't think so its any new vulnerability or exploit (make me
> correct).

Yeah, you're right, there's no bug here -- just a feature. I wrote this
code during a recent security audit and since i found it to be useful i
decided to publish it in the public domain, pretty much as i did in the
past with:


As a side note, although i don't believe the mentioned MySQL UDFs exploit
an actual vulnerability, i've seen similar code used to get unauthorized
access to (misconfigured) systems:


> What i believe its a feature to acess OS files. it never come as a good
> practice to set utl_file_dir=*. On OS you cant set acess for an
> database acoount like scott or others.

As the advisory you mentioned clearly states:

"Keep in mind NEVER to set the init.ora parameter utl_file_dir=* or to
grant the privilege CREATE ANY DIRECTORY to PUBLIC".

Nevertheless, it's not terribly uncommon to find such setups, which allow
to escalate privileges from DBMS user to OS user... Therefore, i though it
would have been nice to share this proof-of-concept code with the security


Marco Ivaldi
Antifork Research, Inc. http://0xdeadbeef.info/
3B05 C9C5 A2DE C3D7 4233 0394 EF85 2008 DBFD B707

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