[sudo-users] using localhost in sudoers

Petr Uzel petr.uzel at suse.cz
Wed Jul 21 09:39:34 EDT 2010

On Wed, Jul 21, 2010 at 09:27:30AM -0400, Todd C. Miller wrote:
> In message <20100721125822.GA26326 at foxbat.suse.cz>
> 	so spake Petr Uzel (petr.uzel):
> > How does "localhost" as Host_Alias in /etc/sudoers work?
> > 
> > E.g. gentoo sudo(ers) guide [1] states that the rule
> > 
> > swift localhost = /usr/bin/emerge
> > allows running emerge only if the user swift is logged in locally,
> > i.e. not through SSH. I don't think this is correct. AFAIU, the
> > Host_Alias can not be used to differentiate between users logged
> > in locally and through ssh, but only to restrict the rule to apply
> > on machines where 'hostname'=='Host_Alias' (useful if sudoers file
> > is shared across several machines).
> Unless the gentoo sudo contains changes to support this, "localhost"
> will never match as a hostname in sudoers unless the call to
> gethostname() fails.

Todd, thanks for the reply.

I'm curious: is it somehow possible to restrict some of the rules only
to users logged locally?

Next, I think that the above is a common misunderstanding - maybe
it should be mentioned in sudoers(5) and/or sudo FAQ ?



Petr Uzel
IRC: ptr_uzl @ freenode
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