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Date: Sun, 2 Jun 2013 10:56:55 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: Using native symlinks
Message-ID: <20130602085655.GB13934@calimero.vinschen.de>
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References: <20130528185553.GA31309@calimero.vinschen.de> <CAGHJv4fkvRt1gQfNTarHGUQWvdRxRsy=oAA=pjUQTLQFoNoW-g@mail.gmail.com> <20130529083910.GD31309@calimero.vinschen.de> <CAGHJv4cUbx_sMCwUgzTd3ZaXVgbfgPt1Fs7pOO4UtwZhFFj-uA@mail.gmail.com> <20130529152339.GB4471@calimero.vinschen.de> <CAGHJv4cKU_vHa7KddQ5dK_3dkj792A8X5Ps9njS_gBNEFWz63Q@mail.gmail.com> <20130529170147.GG4471@calimero.vinschen.de> <CAGHJv4cms9Cg=VA0bFsqK_MvY1fhYbgQA2iOWRKxA=O0Z1FL1A@mail.gmail.com> <20130530090326.GJ4471@calimero.vinschen.de> <51A753F8.90005@openafs.org>
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On May 30 09:28, Jeffrey Altman wrote:
> On 5/30/2013 5:03 AM, Corinna Vinschen wrote:
> 
> > On the other hand, in the same situation the UAC-crippled admins's token
> > does not contain the "Create symbolic links" right:
> > 
> >   $ /cygdrive/c/Windows/System32/whoami /priv
> > 
> >   PRIVILEGES INFORMATION
> >   ----------------------
> > 
> >   Privilege Name                Description                          State
> >   ============================= ==================================== ========
> >   SeShutdownPrivilege           Shut down the system                 Disabled
> >   SeChangeNotifyPrivilege       Bypass traverse checking             Enabled
> >   SeUndockPrivilege             Remove computer from docking station Disabled
> >   SeIncreaseWorkingSetPrivilege Increase a process working set       Disabled
> >   SeTimeZonePrivilege           Change the time zone                 Disabled
> > 
> > I also changed the "Create symbolic links" policy so that the "Users"
> > group is the only group getting this right.  In other words, I removed
> > the "Administrators" group entirely, logged off, logged on, and the
> > result was the same as above.
> > 
> > This is a bug in UAC if you ask me.  It seems to remove privileges from
> > the UAC-crippled admin's token based on a fixed internal list, totally
> > ignorant of changes in the security policy.
> 
> This is a design flaw but it is working as documented.   Administrators have
> SeCreateSymbolicLinkPrivilege by default so UAC removes it.   What UAC
> should
> do in my opinion is not remove a static list of permissions but only
> remove those permissions that are not granted to standard users.

ACK.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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