[OpenAFS] Windows app to recursively apply ACLs - AFSACL

Fri, 09 May 2014 10:40:30 -0400

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On 5/9/2014 6:22 AM, Pedro de Oliveira wrote:
> Hi,
>=20
> I want to announce a little app that I made at work that allows to appl=
y
> OpenAFS ACLs recursively on Windows. Because the current way to apply
> acls on Windows is a bit difficult for normal users.

I am concerned that this application can cause serious harm as currently
implemented.

https://github.com/falsovsky/ACLAFS/blob/master/screenshot.png

It does not show the end user the current list of permissions for all
groups and users included in the ACL.  It does not provide a mechanism
to "clean" the ACL nor does it handle negative ACLs.  All of which are
provided in the AFS Explorer Shell Extension provided with the OpenAFS
distribution.  Select the object to be modified in the Explorer Shell,
right-click to display the context menu and select Properties.  The "AFS
ACL" tab provides the user to ability to adjust the ACLs.

In addition, the recursive behavior crosses volume boundaries because it
is unaware of mount points and symlinks.  The side effect of this tool
is that it will add/modify the specified user/group to the ACL of every
object that can be reached as a subdirectory.   It will not follow the
behavior of Windows that when applying recursive security permissions
that the permissions on the children object must match those set on the
parent.

Many organizations today have experienced unintentional data exposures
or breaches due to incorrectly set ACLs in AFS.  I believe this tool as
currently implemented will make such exposures more likely.

Instead of deploying a new graphical tool to set ACLs I would prefer
that you modify the Explorer Shell extension to support cloning the
permission list defined by the user to child objects within the same
volume.  That will be consistent with existing Windows behavior and will
be consistent with end user expectations that ACLs be set via the object
Properties.

Thank you.

Jeffrey Altman

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