IMHO the are two secure choices:
1. NOOMVS for SPECIAL
2. UID(0) for SPECIAL. Yes, 0. The trick is UID(0) is shared, so there
is one to many relationship. So, hijacking UID(0) does NOT mean
hijacking SPECIAL user. There is a parameter in BPXPRMxx called
SUPERUSER(username). This is the user which would be hijacked for
UID(0)! Obviously you should care not to give this user any
extraordinary attributes. BTW: default username is BPXROOT.
Last, but not least: take care to prevent hijacking. IMHO it's feasible
to configure system in that manner.
My €0.02
--
Radoslaw Skorupka
Lodz, Poland
W dniu 2012-05-14 21:22, Bruce Wheatley pisze:
I seem to recall that in the past adding an OMVS segment to a userid with RACF SPECIAL was
considered a "no-no." Something to do with the posiibility of the userid being
"hijacked" thereby allowing access to its SPECIAL attribute.
Is this still a concern (was it ever?) and if so are there ways to prevent such
"hijacking"?
TIA
(Posted on both RACF& IBM-Main lists)
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