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  • Subject: Re: PC tool to access 400 data
  • From: Rob Berendt <rob@xxxxxxxxx>
  • Date: Mon, 10 Aug 1998 8:42:44 -0500

To ally fears about what fields a person should change and not change can be 
done in a few different ways.  One method is to use separate physical files for 
different types of data.  In the payroll software that we use, 
(SYSGEN/INTEGRAL/SOFTWARE PLUS, and whatever company buys them in the future), 
they break it down this way.  Files like EMPNAM, EMPLRAT, etc.  Another method 
is to allow no access via the physical but to control everything with the 
logicals.  The logicals would only select certain fields.  The security on the 
physical and logical files would then be done with the WRKOBJ command, using 
option 2 to edit the security and using F11 to select the detail.  I forget the 
exact columns to use, (they would be different from the physical to the 
logical), but you get the concept?




johnearl@toolnet.com on 08/08/98 02:14:35 PM
Please respond to MIDRANGE-L@midrange.com@Internet
To:     MIDRANGE-L@midrange.com@Internet
cc:      
Subject:        Re: PC tool to access 400 data

boothm@ibm.net wrote:

> I am assuming that too.
>
> But now, what about this scenario:  A user has change authority to a file
> and has programs on the Client Access menu where he/she can change
> displayed fields like name & address from, oh, say, payroll.  Does this
> mean that now he/she could become an ODBC expert and go in that file and
> change other fields that are not normally displayed to him/her?  I am
> thinking of payroll header files where often times pay rate, y-t-d, q and
> q-t-d totals are kept.  Or Accounts Receivable header files where credit
> limits are kept.  or...

Yes.  That is AS/400's dirty little security secret.

This is not a new security hole, it's been around since the first PC was
connected via APPC (probably to a S/38).  But you used to have to possess a fair
degree of technical aptitude to exploit the hole.  But now, with MS creating all
kinds of fancy wizard programs that allow just about any ODBC user to connect to
the /400, we all have a serious security problem on our hands.

jte


--
John Earl
PowerTech Toolworks
johne@toolnet.com
253-858-7388

Riley Nichole Earl, Born 7/6/98 - 8lb 11oz.  Already an AS/400 fan!
--




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