RE: is it ok to tighten up extproc security?

  • From: "Newman, Christopher" <cjnewman@xxxxxxxxxxxxx>
  • To: <andrew.kerber@xxxxxxxxx>, <dcowles@xxxxxxxxxx>
  • Date: Fri, 14 Nov 2008 08:22:32 -0600

In addition, I believe the extproc stanza is created by default in the 
listener.ora, so it's possible no one specifically set it up.

- Chris

From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On 
Behalf Of Andrew Kerber
Sent: Friday, November 14, 2008 8:19 AM
To: dcowles@xxxxxxxxxx
Cc: oracle-l@xxxxxxxxxxxxx
Subject: Re: is it ok to tighten up extproc security?

That is a standard Sox recommendation. I would go ahead and get rid of it, I 
most applications do not use the extproc.
On Fri, Nov 14, 2008 at 1:51 AM, Douglas Cowles <dcowles@xxxxxxxxxx> wrote:

An application called appdetective has flagged one of my systems as having an 
extproc service which is a security violation in it's estimation. 
It recommend I either remove the lines from listener.ora to prevent the service 
from spawning or modify the protocol.ora to use validnode checking parameter to 
only accept requests from certain network addresses.   

My first question is how can I determine whether there are any external procs 
being used in the database in the first place.   I would figure it would 
require a library, but all the libraries I have in the database are owned by 
sys and don't seem user generated even for Peoplesoft purposes.   I would 
imagine I could turn this off but someone must have modified the listener at 
some point to allow extproc in the first place which makes me think someone 
to do it but when and for what.  It could have been set up 3 years ago.   

Secondly, if the first question is not definitive, is simply putting the 
database server itself as the only node allowed to invoke extproc a solution 
that is likely to handle things?  It is possible a Peoplesoft app or web server 
would want to invoke an extproc on a database server? 

This is a database on AIX 5.3 running Peoplesoft  9 (unsure of exact 

Any other thoughts about how to handle a violation item like this would be 

Doug Cowles

Andrew W. Kerber

'If at first you dont succeed, dont take up skydiving.'

Other related posts: