Kevin, FWIW - as others are stating, assuming you know what you are doing, it is *simple* and painless so long assuming that you are a DA of any domain in the forest and have access to the console of a GC. There are many exploits strategies in this area and in its most basic form this can be done with rudimentary knowledge, native tools, and no coding or scripting.
Aric -----Original Message----- From: "Kevin Brunson" <[EMAIL PROTECTED]> To: "ActiveDir@mail.activedir.org" <ActiveDir@mail.activedir.org> Sent: 9/15/06 1:35 PM Subject: RE: [ActiveDir] Elevating privileges from DA to EA http://www.microsoft.com/technet/security/Bulletin/MS02-001.mspx discusses some elevation of privilege attacks. It also links to another article that is supposed to have more details on SID filtering, which doesn't seem to exist anymore. All references I have found point only at NT4 and 2000 as susceptible to this kind of attack, and they have a patch to fix it. So I guess 2003 is secure at least when it comes to the SIDHistory method. There must be other ways of doing it, though. I don't know that they could possibly be "simple" if MS put out a patch to fix this particular hole way back in 02. The referenced article (for those who don't read it) calls for "a binary edit of the data structures that hold the SIDHistory information". Not exactly "candy from a baby" level, unless you happen to be a 3rd level black-belt in babies-canditsu. But I'm sure someone with extreme skills could take on an unpatched 2000 domain without much trouble. Either way, it looks like sidfiltering mitigates most of the risk. ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Almeida Pinto, Jorge de Sent: Friday, September 15, 2006 2:48 AM To: ActiveDir@mail.activedir.org Subject: RE: [ActiveDir] Elevating privileges from DA to EA >>>Al - we are designing a forest with regional domains (don't ask!) and one region has suggested it needs to split from this forest since elevating rights in any regional domain from DA to EA (forest wide) is 'simple' [and this would break the admin / support model]. What is being said is very very true. Either you trust ALL Domain Admins (no matter the domain those are in) or you do not trust ANY! Every Domain Admin or ANY person with physical access to a DC has the possibility to turn the complete forest into crap! Because if that was NOT the case the DOMAIN would be the security boundary. Unfortunately it is not! The Forest is the security boundary, whereas EVERY single DC in the forest MUST be protected and EVERY Domain Admin MUST be trusted! >>>I am arguing that it is not simple and am looking for methods which may be used to elevate rights as per the above When you know HOW, it is as easy as taking candy from a baby jorge ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED] Sent: Friday, September 15, 2006 09:36 To: ActiveDir@mail.activedir.org Subject: RE: [ActiveDir] Elevating privileges from DA to EA Thanks for responses, all. Al - we are designing a forest with regional domains (don't ask!) and one region has suggested it needs to split from this forest since elevating rights in any regional domain from DA to EA (forest wide) is 'simple' [and this would break the admin / support model]. I am arguing that it is not simple and am looking for methods which may be used to elevate rights as per the above. Make sense? neil ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Al Mulnick Sent: 14 September 2006 20:59 To: ActiveDir@mail.activedir.org Subject: Re: [ActiveDir] Elevating privileges from DA to EA Can you reword? I'm not sure I clearly understand the question. FWIW, going from DA to EA is a matter of adding one's id to the EA group. DA's have that right in the root domain of the forest (DA's of the root domain have that right). Editing etc. is not necessary. Nor are key-loggers etc. If physical access is available, there are plenty of ways to get the access you require to a domain but I suspect you're asking how can a DA from a child domain gain EA access; is that the question you're looking to answer? Just for curiousity, what brings up that question? Al On 9/14/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: It has been suggested by certain parties here that elevating one's rights from AD to EA is 'simple'. I have suggested that whilst it's possible it is not simple at all. Does anyone have any descriptions of methods / backdoors / workarounds etc that can be used to elevate rights in this way? Naturally, you may prefer to send this to me offline :) [ [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] I can think of the following basic methods: - Remove DC disks and edit offline - Introduce key logger on admin workstation / DC - Inject code into lsass As you can see, I don't want specific steps to 'hack' the DC, just basic ideas / methods. 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