Re: Access Management on file shares and client-server apps

[Ansgar Wiechers <bugtraq () planetcobalt net>]

On 2011-11-14 krymson () gmail com wrote:
> Including "desktop client-server applications" may confuse the issue
> quite a bit. I'll read this as: You want to find a way to audit and
> maybe track changes to permissions settings on Microsoft folders.
> (I'll ignore share permissions, since share permissions should just be
> open and NTFS is where you should be explicit; but that itself is an
> arguable viewpoint...)
>
> It's been years since I used it, but I always liked ScriptLogic's
> Enterprise Security Reporter. It should be able to scan a folder
> location, interrogate the NTFS permissions, and generate a nice report
> that tells you all the effective permissions. I can't comment on how
> it tracks changes.
>
> If you're good about managing NTFS permissions properly by never
> assigning explicit AD *user accounts* permissions to folders and
> instead only assigning AD *groups* (that users are members of) to
> folders, you could get away with just interrogating AD groups and
> memberships. At that point you'll be looking at Active Directory
> change management/audit tools that tell you when new groups are made
> and when those groups are modified with new or removed users (or track
> user changes similarly).

Monitoring changes to AD groups is not sufficient if the task is to
track changes to permissions on files or folder. Even if you properly
handle access through group memberships, there's still the possibility
that permissions for some group were added to or revoked from a file or
folder.

If you want to track changes to permissions, SACLs are the way to go
(see e.g. [1]). If you want to analyze the current permissions, there is
a variety of tools you can use, like ntfsacls [2], DumpSec [3], or my
own script AuditACLs.vbs [4] (if you'll forgive the shameless plug).

[1] http://www.windowsitpro.com/article/permissions/auditing-permission-changes-on-a-folder
[2] http://www.coopware.in2.info/_ntfsacl.htm
[3] http://www.systemtools.com/somarsoft/
[4] http://www.planetcobalt.net/sdb/auditacls.shtml

Regards
Ansgar Wiechers
-- 
"All vulnerabilities deserve a public fear period prior to patches
becoming available."
--Jason Coombs on Bugtraq

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