RE: Buffer overflow and code execution on iSeries

For years I sold a product named SUSPENSE that hooked the SEPT so that when
the SysReq key was pressed, the end-user could either enter a command or
select the regular SysReq Menu options. It was very widely received and
utilized. I had no problems, but of course on each OS update, the customers
had to reinstall the tool.

-Bob Cozzi
www.RPGxTools.com
If everything is under control, you are going too slow.
- Mario Andretti

-----Original Message-----
From: mi400-bounces@xxxxxxxxxxxx [mailto:mi400-bounces@xxxxxxxxxxxx] On
Behalf Of jm penasse
Sent: Wednesday, July 20, 2005 4:10 AM
To: MI Programming on the AS400 / iSeries
Subject: RE: [MI400] Buffer overflow and code execution on iSeries

Steve,


> All theory of course. The SEPT hook is something I always wanted
> to try but
> did not have the nerve for.  What is the worse that could happen?
>  A system
> crash??
>
> -Steve

Each job has a pointer to the Sept in its PCO.
So, you can create your own space, copy the original Sept into your space,
in the PCO change the sept pointer to a pointer to your space. Voilà !
You can change pointers in your space as you like, only your job will crash.
Nevertheless I advise to restore original SEPT Pointer into PCO before
ending your job. Entries in WCBT are reused, and new jobs may be started
with your own "sept".

Jean Michel

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