full-disclosure - Re: Flaw in Microsoft Domain AccountCachingAllows Local Workstation Admins to TemporarilyEscalate PrivilegesandLogin as Cached Domain Admin Accounts (2010-M$-002)

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Message-ID: <38A606BEDEB0491486CBB4A91E7C27FD@Bonaventure>
Date: Mon, 13 Dec 2010 11:13:36 -0800
From: "David Gillett" <gillettdavid@...a.edu>
To: "'Thor \(Hammer of God\)'" <thor@...merofgod.com>,
	"'George Carlson'" <gcarlson@...s.edu>, <bugtraq@...urityfocus.com>,
	<full-disclosure@...ts.grok.org.uk>
Subject: Re: Flaw in Microsoft
	Domain	AccountCachingAllows	Local Workstation Admins
	to	TemporarilyEscalate	PrivilegesandLogin as Cached Domain
	Admin	Accounts (2010-M$-002)

If our users hadn't been local admins (not my choice), they would not have
been able to eject Domain Admins from the Local Admins group in the first
place....

David Gillett

-----Original Message-----
From: Thor (Hammer of God) [mailto:thor@...merofgod.com]
Sent: Monday, December 13, 2010 10:49
To: David Gillett; 'George Carlson'; bugtraq@...urityfocus.com;
full-disclosure@...ts.grok.org.uk
Subject: RE: [Full-disclosure] Flaw in Microsoft Domain AccountCachingAllows
Local Workstation Admins to TemporarilyEscalate PrivilegesandLogin as Cached
Domain Admin Accounts (2010-M$-002)

You made all domain users local admin?  Or did you do some sort of RUNAS in
the logon script?

>-----Original Message-----
>From: David Gillett [mailto:gillettdavid@...a.edu]
>Sent: Monday, December 13, 2010 10:16 AM
>To: Thor (Hammer of God); 'George Carlson'; bugtraq@...urityfocus.com;
>full-disclosure@...ts.grok.org.uk
>Subject: RE: [Full-disclosure] Flaw in Microsoft Domain Account
>CachingAllows Local Workstation Admins to Temporarily Escalate
>Privileges andLogin as Cached Domain Admin Accounts (2010-M$-002)
>
>> If I take the domain admin out of my local administrators, they can't
>> do
>anything.  Done.
>
>  Back when I did AD/domain support, all domain user accounts got a
>profile that included a trivial script to re-add Domain Admins to the
>Local Admins group.  So this kind of local removal shenanigans lasted
>only until the user next logged into the domain.
>
>David Gillett

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