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: <58DB1B68E62B9F448DF1A276B0886DF16EB719BD@EX2010.hammerofgod.com>
Date: Mon, 13 Dec 2010 20:17:39 +0000
From: "Thor (Hammer of God)" <thor@...merofgod.com>
To: David Gillett <gillettdavid@...a.edu>, 'George Carlson'
	<gcarlson@...s.edu>,
	"bugtraq@...urityfocus.com" <bugtraq@...urityfocus.com>, 
	"full-disclosure@...ts.grok.org.uk" <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)

You knew where I was going with that, and I know that YOU know all this, so I'll just leave that one alone :)

t

>-----Original Message-----
>From: David Gillett [mailto:gillettdavid@...a.edu]
>Sent: Monday, December 13, 2010 11:14 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 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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