On 21/01/2014 15:36, Joseph L. Casale wrote:
> I have a scenario where I have a directory owned by localhost\Administrators
> with
> that group and SYSTEM set to full control without inheritance propagated.
>
> Under this, I have a folder owned by another account with only that account
> granted
> full control.
>
> If I elevate my token and run:
>
> win32security.SetNamedSecurityInfo(
> path,
> win32security.SE_FILE_OBJECT,
> win32security.OWNER_SECURITY_INFORMATION,
> owner.sid,
> None,
> None,
> None
> )
>
> from the account that has full control (and originally owned it), I can view
> the new owner.
>
> This however doesn't allow the context that changed the owner to then access
> the dacl
> and add an ace? That context still cannot view the directory permissions
> which doesn't jive
> with the behavior of takeown.exe for example, after assuming ownership with
> that binary,
> the alternate context can view the permissions and see the original owner is
> the only entry
> in the ACL with full control (as it was)?
I think I understand your setup, which I've simulated below: an
"ownership" directory owned by Admins and with SYSTEM & Admins only
having full control. No inheritance; no propagation. Then an
"other-account" directory below it; again, no inheritance and owned by a
different account which has full control.
C:\temp>cacls ownership
C:\temp\ownership NT AUTHORITY\SYSTEM:(OI)(CI)F
BUILTIN\Administrators:(OI)(CI)(NP)F
C:\temp>cacls ownership\*
C:\temp\ownership\other-account VOUK\goldent:(OI)(CI)F
Although you don't show the code you're using to affect the
newly-reowned DACL, I suspect the problem is that you're not specifying
DACL-only access? In other words, your Ownership status gives you *just
enough* permission to write to the DACL to give yourself more. (ie
WRITE_DAC). Any attempt to access any other aspect of the security
structure will almost certainly fail with access denied.
Does that help?
TJG
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