The behavior of loading RENT modules from authorized libraries into subpool 252 (key 0) is to prevent them from being modified by unauthorized programs. That is intended to contribute to security.
Jim Mulder z/OS Diagnosis, Design, Development, Test IBM Corp. Poughkeepsie NY "IBM Mainframe Discussion List" <[email protected]> wrote on 08/30/2021 08:41:39 AM: > From: "Andrew Rowley" <[email protected]> > To: [email protected] > Date: 08/30/2021 09:43 AM > Subject: Re: RENT binder option > Sent by: "IBM Mainframe Discussion List" <[email protected]> > > On 30/08/2021 11:59 am, CM Poncelet wrote: > > The bottom line is that the integrity/security of a current OS cannot be > > reduced to a lower integrity/security level by upgrading it to a new OS > > - as e.g. upgrading OS/390 to z/OS could not result in z/OS then being > > less secure than OS/390. > > > > Hence the argument that the integrity/security provided by 'REUS, RENT, > > REFR' in OS/390 does not apply to z/OS is absurd - as this would imply > > that z/OS is less secure than OS/390. > > I don't think REUS, RENT, REFR are intended to contribute to security at > all. All these attributes are is an indication of when a new copy of a > module needs to be loaded, and when an existing copy can be shared. > > -- > Andrew Rowley > Black Hill Software > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
