>Number:         28521
>Category:       misc
>Synopsis:       OpenFirmware 2.0.3 is overwriteable
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    misc-bug-people
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 03 04:42:00 +0000 2004
>Originator:     Majid
>Release:        N/A
>Organization:
Independent
>Environment:
N/A
>Description:
It is possible to overwrite the openfirmware version 2.0.3 contrary to what the MacPPC documentation says (which says version 3 is overwriteable). So it should be changed saying that lower versions such as 2.0.3 is overwriteable on some computers (the one I overwrote was version 2.0.3 on a Performa 5500/225).

Regards

>How-To-Repeat:
(Warning this repetition will definitivly overwrite your OFW 2.0.3 on Performa 5500/225)
setenv real-base F0000000
setenv load-base 60000000

boot fd:,ofwboot.xcf


>Fix:
Avoid playing around in sensitive stuff and follow the docs precisly =)