This ISO can be downloaded by performing the following steps:
Log into RHN
Click on Software Downloads on the left-hand side of the screen
Navigate to the version of Red Hat Enterprise Linux you are currently using
Click on the latest version of RHN Satellite Server
Then choose if you want the embedded Oracle Database ISO or the non-embedded version
Once you have followed all steps, refer to the instructions for a Satellite upgrade within the /etc/sysconfig/rhn/satellite-upgrade/README file in the rhn-upgrade package.