Re: pam_wheel: su to non-root vs. su to root

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2002-10-14 11:39, Werner Puschitz write:
> This is clearly a bug. pam_wheel should not restrict su-ing to non-root 
> accounts. I see the same behaviour on my system.
> 
> Werner
>  
> On Sun, 13 Oct 2002, KhoGuan PhuaN wrote:
> > The security policy enforced by pam_wheel.so module is to grant
> > privilege of su'ing to `both root and non-root' only to people
> > in a privileged group(default wheel group, if not found, group with 
> > gid=0). I think it's overkilling. The reasoning is as follows:
> > 
> > 1. It should do just what it claims to do: "only permit root
> >     authentication to members of wheel group", but no more. That is,
> >     leave non-root authentication alone.
> > 
> > 2. Even if it's desirable to restrict su'ing to non-root, and to
> >     incorporate this function into pam_wheel, it should be implemented
> >     in a different level, perhaps by designing different arguments for
> >     pam_wheel. Su'ing to root has much more security concern than su'ing
> >     to general users. And the latter would be very convenient for two
> >     users who trust each other and share each other's passwords. The
> >     admin should not deprive their humble wishes of doing that. It's not
> >     related to the wheel group membership. The policy is UNFAIR that they
> >     are not allowed to su to each other just because they are not members
> >     of the wheel group, which has only to do with system maintenance they
> >     would never be interested in.
> > 
> > Yet another concern comes to me: what about su'ing to wheel members by
> > non-wheel members. Should it be implemented in yet another different
> > pam_wheel argument. Maybe it's good, maybe it's overkilling on the other 
> > end.
> > 
> > Should I file a `bug' report? Or do I over-sympathize with the dummy
> > users who are always messing things up. Any suggestion and correction 
> > would be highly appreciated.
> > 
> > --KhoGuan Phuann

Werner and Jenn,

Thanks for your confirmation, I just submitted a bug report #623227
to the PAM project on sourceforge.net.

Best regards,

Khoguan




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