[THIN] Re: Installing Programs on the Server

  • From: "Braebaum, Neil" <Neil.Braebaum@xxxxxxxxxxxxxxxxx>
  • To: "'thin@xxxxxxxxxxxxx'" <thin@xxxxxxxxxxxxx>
  • Date: Thu, 6 Feb 2003 16:25:35 -0000

Comments inline...

> -----Original Message-----
> From: Brian Murphy [mailto:bem9127@xxxxxxxxx] 
> Sent: 06 February 2003 16:07
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: Installing Programs on the Server
> Importance: Low
> Neil,
> It was installed to c:\Program Files\Hotbar
> Permissions:
> Admins = Full
> Users = RO
> There were some additional config files written to H: (Home Drives)
> I guess my theory is that the program was installed with 
> elevated privileges.  Although I don't have any data to 
> suggest this.  The permission set for c:\Program Files\ would 
> not allow installation of a program by a normal user.

Then look at the owner and permissions on the files in the hotbar directory
(including the directory itelf). It should show who created it (owner). And
the permissions may show if it was assuming some other user, or elevated

> > If you prevent access to these *discretionary* accessible resources,
> then users cannot install software onto the *local* > machine 
> - how / where would it be installed to. They may have write 
> access to their home (presumably
> > networked) directory, and they will almost certainly have 
> write access
> to their local cache of their profile.
> If you have locked down local drives to Read-Only, 
> HKLM\Software to Read-Only.  You have confirmed that users 
> cannot download content or install applications locally.  
> What other "accessible resources" are we referring to?

Well as far as a server is concerned, the relevant resources are the
registry and the disk. If you're assumption is that something subverted the
OS's security model, and assumed higher privileges, without the appropriate
credentials being supplied - I'm not saying I don't believe it, and it's not
possible - but you have to admit, it does strike you as being rather

Regardless, anything new (folders / files, or registry keys) will show the
owner (assuming it hasn't been changed since).

> All of this has been done and the Hotbar would still install. 
>  Is it possible the installation routine is running with 
> elevated priveledges?
> Or, am I missing something else?

If something can this easily bypass the OS's security model, without
supplying appropriate credentials - you would have to worry. There should be
something detectable, though.

Check the owner and the DACLs for the files / folders.


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