| Author | Messages | |
sbradcpa
Posts:496
 | | 01/09/2009 2:52 AM |
| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body bgcolor="#ffffff" text="#000000"> "NTLMv1 is vulnerable to sniff-an-crack attacks
NTLMv2 is not vulnerable"
<a class="moz-txt-link-freetext" href="http://support.microsoft.com/kb/823659">http://support.microsoft.com/kb/823659</a>
LAN Manager (LM) authentication is the protocol that is used to authenticate Windows clients for network operations, including domain joins, accessing network resources, and user or computer authentication. The LM authentication level determines which challenge/response authentication protocol is negotiated between the client and the server computers. Specifically, the LM authentication level determines which authentication protocols that the client will try to negotiate or that the server will accept. The value that is set for LmCompatibilityLevel determines which challenge/response authentication protocol is used for network logons. This value affects the level of authentication protocol that clients use, the level of session security negotiated, and the level of authentication accepted by servers, according to the following table.
Get rid of those pesky older OSs would be a good start. :-)
It looks like 2k8 is default Network Security: Lan Manager authentication level: Send NTLM v2 response only
Gabriele Scolaro wrote: <blockquote cite="mid:009b01c96fa7$6fe17d40$4fa477c0$@net" type="cite"> <meta http-equiv="Content-Type" content="text/html; "> <meta name="Generator" content="Microsoft Word 12 (filtered medium)"> <!--[if !mso]> <style> v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} </style> <![endif]--> <style> <!-- /* Font Definitions */ @font-face {font-family:Wingdings; panose-1:5 0 0 0 0 0 0 0 0 0;} @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4;} @font-face {font-family:Tahoma; panose-1:2 11 6 4 3 5 4 4 2 4;} @font-face {font-family:Consolas; panose-1:2 11 6 9 2 2 4 3 2 4;} @font-face {font-family:Verdana; panose-1:2 11 6 4 3 5 4 4 2 4;} @font-face {font-family:"Wingdings 2"; panose-1:5 2 1 2 1 5 7 7 7 7;} @font-face {font-family:"AR Sans Serif"; panose-1:0 0 0 0 0 0 0 0 0 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0cm; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";} h2 {mso-style-priority:9; mso-style-link:"Heading 2 Char"; mso-margin-top-alt:auto; margin-right:0cm; mso-margin-bottom-alt:auto; margin-left:0cm; font-size:18.0pt; font-family:"Times New Roman","serif"; font-weight:bold;} a:link, span.MsoHyperlink {mso-style-priority:99; color:blue; text-decoration:underline;} a:visited, span.MsoHyperlinkFollowed {mso-style-priority:99; color:purple; text-decoration:underline;} p {mso-style-priority:99; mso-margin-top-alt:auto; margin-right:0cm; mso-margin-bottom-alt:auto; margin-left:0cm; font-size:12.0pt; font-family:"Times New Roman","serif";} pre {mso-style-priority:99; mso-style-link:"HTML Preformatted Char"; margin:0cm; margin-bottom:.0001pt; font-size:10.0pt; font-family:"Courier New";} p.MsoAcetate, li.MsoAcetate, div.MsoAcetate {mso-style-priority:99; mso-style-link:"Balloon Text Char"; margin:0cm; margin-bottom:.0001pt; font-size:8.0pt; font-family:"Tahoma","sans-serif";} p.MsoListParagraph, li.MsoListParagraph, div.MsoListParagraph {mso-style-priority:34; margin-top:0cm; margin-right:0cm; margin-bottom:0cm; margin-left:36.0pt; margin-bottom:.0001pt; font-size:12.0pt; font-family:"Times New Roman","serif";} span.Heading2Char {mso-style-name:"Heading 2 Char"; mso-style-priority:9; mso-style-link:"Heading 2"; font-weight:bold;} span.HTMLPreformattedChar {mso-style-name:"HTML Preformatted Char"; mso-style-priority:99; mso-style-link:"HTML Preformatted"; font-family:Consolas;} span.BalloonTextChar {mso-style-name:"Balloon Text Char"; mso-style-priority:99; mso-style-link:"Balloon Text"; font-family:"Tahoma","sans-serif";} span.EmailStyle23 {mso-style-type:personal; font-family:"Calibri","sans-serif"; color:#1F497D;} span.EmailStyle24 {mso-style-type:personal; font-family:"Calibri","sans-serif"; color:#1F497D;} span.EmailStyle25 {mso-style-type:personal; font-family:"Calibri","sans-serif"; color:#1F497D;} span.EmailStyle26 {mso-style-type:personal-reply; font-family:"Calibri","sans-serif"; color:#1F497D;} .MsoChpDefault {mso-style-type:export-only; font-size:10.0pt;} @page Section1 {size:612.0pt 792.0pt; margin:72.0pt 72.0pt 72.0pt 72.0pt;} div.Section1 {page:Section1;} /* List Definitions */ @list l0 {mso-list-id:1070927313; mso-list-type:hybrid; mso-list-template-ids:1058303726 -2112036034 68157443 68157445 68157441 68157443 68157445 68157441 68157443 68157445;} @list l0:level1 {mso-level-start-at:0; mso-level-number-format:bullet; mso-level-text:-; mso-level-tab-stop:none; mso-level-number-position:left; text-indent:-18.0pt; font-family:"Calibri","sans-serif"; mso-fareast-font-family:Calibri; mso-bidi-font-family:"Times New Roman";} ol {margin-bottom:0cm;} ul {margin-bottom:0cm;} --> </style><!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1026" /> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1" /> </o:shapelayout></xml><![endif]--> <div class="Section1"> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">Brrrr I recall Marcus Murray session was one of those who really shocked me!<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><i><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">TechNet Webcast: Why I Can Hack Your Network in a Day! [A live demonstration of techniques and tools used by hackers to compromise your network] (Level 300) (ID:1032340737)<o:p></o:p></span></i></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><a moz-do-not-send="true" href="http://www.microsoft.com/events/series/detail/webcastdetails.aspx?seriesid=96&webcastid=2783">http://www.microsoft.com/events/series/detail/webcastdetails.aspx?seriesid=96&webcastid=2783</a><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><a moz-do-not-send="true" href="http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032340737&EventCategory=3&culture=en-US&CountryCode=US">http://msevents.microsoft.com/cui/WebCastEventDetails.aspx?EventID=1032340737&EventCategory=3&culture=en-US&CountryCode=US</a><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">Before that, I was _ingenuously_ recommending my DAs colleagues to use runas to manage AD from their workstation…. :-(<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <p class="MsoListParagraph" style="text-indent: -18pt;"><!--[if !supportLists]--><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><span style="">-<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--[endif]--><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">is there any countermeasure to address or at least mitigate that security issue?<o:p></o:p></span></p> <p class="MsoListParagraph" style="text-indent: -18pt;"><!--[if !supportLists]--><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><span style="">-<span style="font-family: "Times New Roman"; font-style: normal; font-variant: normal; font-weight: normal; font-size: 7pt; line-height: normal; font-size-adjust: none; font-stretch: normal;"> </span></span></span><!--[endif]--><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">what’s the recommended way to manage AD? (e.g. a dedicated hardened VM to connect to via secure RDP)<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">Thanks – (yet afraid and worried) Gabriele.<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <div style="border-style: none none none solid; border-color: -moz-use-text-color -moz-use-text-color -moz-use-text-color blue; border-width: medium medium medium 1.5pt; padding: 0cm 0cm 0cm 4pt;"> <div> <div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0cm 0cm;"> <p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US"> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">ActiveDir-owner@mail.activedir.org</a> [<a class="moz-txt-link-freetext" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">mailto:ActiveDir-owner@mail.activedir.org</a>] <b>On Behalf Of </b>Crawford, Scott
<b>Sent:</b> lunedì 5 gennaio 2009 22.02
<b>To:</b> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir'+'@'+'mail'+'.activedir')".org">ActiveDir@mail.activedir.org</a>
<b>Subject:</b> RE: [ActiveDir] RODC and computer accounts that are allowed to have their creds replicated.<o:p></o:p></span></p> </div> </div> <p class="MsoNormal"><o:p> </o:p></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">I think Jorge’s point is that cracking is unnecessary.<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal" style=""><b><span style="font-size: 18pt;" lang="EN">Hash injection Attacks in a Windows Network<o:p></o:p></span></b></p> <p class="MsoNormal"><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">aka </span></i><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><b><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">Why an exposed LM/NTLM Hash is comparable to a clear-text password </span></i></b><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">aka</span></i><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><b><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">Why a 127 character long password is not necessarily stronger than a 4 character long password</span></i></b><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">aka </span></i><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><b><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">Why generating LM/NTLM rainbow tables is a complete waste of time</span></i></b><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">aka</span></i><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><b><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">Passing-the-hash for direct authentication to remote systems</span></i></b><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">aka</span></i><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><b><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">Why one vulnerable system can compromise the entire Active directory forest</span></i></b><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">aka</span></i><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><b><i><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN">One of the scariest Windows authentication hacks you ever saw.......</span></i></b><span lang="EN"><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><a moz-do-not-send="true" href="http://truesecurity.se/blogs/murray/archive/2007/03/16/why-an-exposed-lm-ntlm-hash-is-comparable-to-a-clear-text-password.aspx">http://truesecurity.se/blogs/murray/archive/2007/03/16/why-an-exposed-lm-ntlm-hash-is-comparable-to-a-clear-text-password.aspx</a><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <div> <div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0cm 0cm;"> <p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US"> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">ActiveDir-owner@mail.activedir.org</a> [<a class="moz-txt-link-freetext" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">mailto:ActiveDir-owner@mail.activedir.org</a>] <b>On Behalf Of </b>Michael B. Smith
<b>Sent:</b> Monday, January 05, 2009 2:38 PM
<b>To:</b> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir'+'@'+'mail'+'.activedir')".org">ActiveDir@mail.activedir.org</a>
<b>Subject:</b> RE: [ActiveDir] RODC and computer accounts that are allowed to have their creds replicated.<o:p></o:p></span></p> </div> </div> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">It’s certainly possible to crack the hash with rainbow tables. My 64 GB tables get more than 99% of passwords.<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <div> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">Regards,<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">Michael B. Smith, MCITP:SA,EMA/MCSE/Exchange MVP<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">My blog: <a class="moz-txt-link-freetext" href="http://TheEssentialExchange.com/blogs/michael">http://TheEssentialExchange.com/blogs/michael</a><o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">I'll be at TEC'2009! <a class="moz-txt-link-freetext" href="http://www.tec2009.com/vegas/index.php">http://www.tec2009.com/vegas/index.php</a><o:p></o:p></span></p> </div> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <div> <div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0cm 0cm;"> <p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US"> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">ActiveDir-owner@mail.activedir.org</a> [<a class="moz-txt-link-freetext" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">mailto:ActiveDir-owner@mail.activedir.org</a>] <b>On Behalf Of </b>Jorge de Almeida Pinto
<b>Sent:</b> Monday, January 05, 2009 3:00 PM
<b>To:</b> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir'+'@'+'mail'+'.activedir')".org">ActiveDir@mail.activedir.org</a>
<b>Subject:</b> RE: [ActiveDir] RODC and computer accounts that are allowed to have their creds replicated.<o:p></o:p></span></p> </div> </div> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US">Did you know it is possible to misuse an AD account when having: the logon name and the password hash? (I do not care about the actual password)<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="NL">Met vriendelijke groeten / Kind regards,<o:p></o:p></span></b></p> <p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="NL"><o:p> </o:p></span></b></p> <p class="MsoNormal" style=""><b><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="PT">Ing. Jorge de Almeida Pinto<o:p></o:p></span></b></p> <p class="MsoNormal" style=""><i><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="PT">Senior Technical Consultant<o:p></o:p></span></i></p> <p class="MsoNormal" style=""><i><span style="font-size: 10pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="PT">MVP Identity & Access - Directory Services<o:p></o:p></span></i></p> <p class="MsoNormal"><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB"><o:p> </o:p></span></b></p> <p class="MsoNormal"><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB">Oxford Computer Group Benelux<o:p></o:p></span></b></p> <p class="MsoNormal"><span style="font-size: 10pt; font-family: Wingdings; color: rgb(31, 73, 125);" lang="EN-US">(</span><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB">: +31 (0)6 26.26.62.80 | </span><span style="font-size: 10pt; font-family: Wingdings; color: rgb(31, 73, 125);" lang="EN-US">(</span><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB">: +31 (0)70 36.21.045 | </span><span style="font-family: "Wingdings 2"; color: rgb(31, 73, 125);" lang="EN-US">7</span><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB">: +31 (0)70 36.21.677
</span><b><span style="font-size: 10pt; font-family: Wingdings; color: rgb(31, 73, 125);" lang="EN-US">-</span></b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB">: Sweelinckplein 9 - 11 (unit 11), 2517 GK, Den Haag, The Netherlands (<a moz-do-not-send="true" href="http://maps.google.com/maps?f=q&hl=EN&geocode=&q=sweelinckplein+9+-+11+%28unit+11%29,+2517+GK,+Den+Haag,+The+Netherlands&sll=37.0625,-95.677068&sspn=50.291089,113.90625&ie=UTF8&z=16&g=sweelinckplein+9+-+11+%28unit+11%29,+2517+GK,+Den+Haag,+The+Netherlands">Google Maps</a> (<a moz-do-not-send="true" href="http://maps.live.com/default.aspx?v=2&FORM=LMLTCC&cp=52.084005%7E4.285932&style=r&lvl=14&tilt=-90&dir=0&alt=-1000&phx=0&phy=0&phscl=1&where1=Sweelinckplein%209%20-%2011%20%28unit%2011%29%2C%202517%20GK%2C%20Den%20Haag%2C%20The%20Netherlands&encType=1">Live Maps</a>
</span><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="NL"></span><a moz-do-not-send="true" href="blocked::blocked::http://www.oxfordcomputergroup.com/" title="blocked::blocked::http://www.oxfordcomputergroup.com/ blocked::http://www.oxfordcomputergroup.com/"><font color="red"><b>MailScanner ha rilevato un possibile tentativo di frode proveniente da "blocked::http:" </b></font> <span lang="EN-GB">www.oxfordcomputergroup.com</span></a><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB"> | Expertise in Identity & Access Management<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB">Registered nr Chamber of Commerce/KvK 32129259, VAT/BTW NL8188.31.972.BO1<o:p></o:p></span></p> <p class="MsoNormal"><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="EN-GB"><o:p> </o:p></span></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><img id="Picture_x0020_1" src="cid:part1.02030503.04070805@pacbell.net" border="0" height="57" width="602"></span><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(31, 73, 125);" lang="NL"><o:p></o:p></span></p> <p class="MsoNormal" style=""><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB">________________________________________________________________<o:p></o:p></span></b></p> <p class="MsoNormal" style=""><b><i><u><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB">MVP Profile</span></u></i></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB"> </span></b><b><span style="font-size: 9pt; font-family: Wingdings; color: rgb(23, 54, 93);" lang="PT-BR">à</span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="PT-BR"> </span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB"><a moz-do-not-send="true" href="https://mvp.support.microsoft.com/profile/jorge1">https://mvp.support.microsoft.com/profile/jorge1</a><o:p></o:p></span></b></p> <p class="MsoNormal" style=""><b><i><u><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB">MVP Home Site</span></u></i></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB"> </span></b><b><span style="font-size: 9pt; font-family: Wingdings; color: rgb(23, 54, 93);" lang="PT-BR">à</span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="PT-BR"> </span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB"><a moz-do-not-send="true" href="https://mvp.support.microsoft.com/">https://mvp.support.microsoft.com/</a><o:p></o:p></span></b></p> <p class="MsoNormal" style=""><b><i><u><span style="font-size: 9pt; 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font-family: Wingdings; color: rgb(23, 54, 93);" lang="PT-BR">à</span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="PT-BR"> </span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-US"><a moz-do-not-send="true" href="http://blogs.dirteam.com/blogs/jorge/default.aspx">http://blogs.dirteam.com/blogs/jorge/default.aspx</a></span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB"><o:p></o:p></span></b></p> <p class="MsoNormal" style=""><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-GB">________________________________________________________________</span></b><b><span style="font-size: 9pt; font-family: "Verdana","sans-serif"; color: rgb(23, 54, 93);" lang="EN-US"><o:p></o:p></span></b></p> <p class="MsoNormal"><span style="font-size: 11pt; font-family: "Calibri","sans-serif"; color: rgb(31, 73, 125);" lang="EN-US"><o:p> </o:p></span></p> <div style="border-style: solid none none; border-color: rgb(181, 196, 223) -moz-use-text-color -moz-use-text-color; border-width: 1pt medium medium; padding: 3pt 0cm 0cm;"> <p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US"> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">ActiveDir-owner@mail.activedir.org</a> [<a class="moz-txt-link-freetext" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">mailto:ActiveDir-owner@mail.activedir.org</a>] <b>On Behalf Of </b>Tony Gordon
<b>Sent:</b> Monday, January 05, 2009 20:45
<b>To:</b> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir'+'@'+'mail'+'.activedir')".org">ActiveDir@mail.activedir.org</a>
<b>Subject:</b> RE: [ActiveDir] RODC and computer accounts that are allowed to have their creds replicated.<o:p></o:p></span></p> </div> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <p class="MsoNormal" style="margin-bottom: 12pt;"><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">Appreciate everyone's answers.</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif"; color: blue;" lang="EN-US">member: CN=Domain Controllers,CN=Users,DC=trouble,DC=loc</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US"> . OK, so the Domain Controller's password will not be replicated to the RODC. Should have looked before asking.</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Calibri","sans-serif"; color: rgb(0, 64, 128);" lang="EN-US">The specific risk is that the password of all computer accounts is still distributed on all RODCs. I would still use the specific allow group for a particular RODC and automate the group membership in some way using scripts or your IdAM solution (e.g. ILM) if you already have such.</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">IdAM is only managing user accounts not computer accounts. So I guess the question should have been formulated as: </span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">How much of a risk at this time is if the passwords of the member computers are replicated to the RODCs? </span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">Computer passwords should be fairly strong and NTLM hash storage is disabled by the policy (IIRC they are longer then 14 char and not stored anyway).</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">So how much of a risk it really is?</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">
</span><span style="font-size: 10pt; font-family: "AR Sans Serif","serif";" lang="EN-US">
Thank you, Tony. </span><span lang="EN-US">
<img id="_x0000_i1025" src="cid:part2.08020901.09000903@pacbell.net" border="0" height="60" width="60"></span><b><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">
Tony Gordon </span></b><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";" lang="EN-US">
Windows 2003 & 2000 MCSE, Windows 2003 MCSA, PMP
ITS Infrastructure Engineering
Hewitt Associates | 100 Half Day Road | Lincolnshire, IL 60069 | USA
Tel 847.295.5000 x50526 | Fax 847.554.1574
tony dot gordon at hewitt dot com | </span><span lang="EN-US"></span><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";"><a moz-do-not-send="true" href="www.hewitt.com">www.hewitt.com</a> <o:p></o:p></span></p> <table class="MsoNormalTable" style="width: 100%;" border="0" cellpadding="0" width="100%"> <tbody> <tr> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: rgb(95, 95, 95);">From:</span> <o:p></o:p></p> </td> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";">joe <a class="moz-txt-link-rfc2396E" href="javascript:window.location.replace('ma'+'ilto:'+'listmail'+'@'+'joeware'+'.net')"><listmail@joeware.net></a></span> <o:p></o:p></p> </td> </tr> <tr> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: rgb(95, 95, 95);">To:</span> <o:p></o:p></p> </td> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";"><a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir'+'@'+'mail'+'.activedir')".org">ActiveDir@mail.activedir.org</a></span> <o:p></o:p></p> </td> </tr> <tr> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: rgb(95, 95, 95);">Date:</span> <o:p></o:p></p> </td> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";">01/02/2009 03:11 PM</span> <o:p></o:p></p> </td> </tr> <tr> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: rgb(95, 95, 95);">Subject:</span> <o:p></o:p></p> </td> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";">RE: [ActiveDir] RODC and computer accounts that are allowed to have their creds replicated.</span> <o:p></o:p></p> </td> </tr> <tr> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif"; color: rgb(95, 95, 95);">Sent by:</span> <o:p></o:p></p> </td> <td style="padding: 0.75pt;" valign="top"> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";"><a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">ActiveDir-owner@mail.activedir.org</a></span><o:p></o:p></p> </td> </tr> </tbody> </table> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <div class="MsoNormal" style="text-align: center;" align="center"><span lang="EN-US"> <hr style="color: rgb(160, 160, 160);" align="center" noshade="noshade" size="2" width="100%"></span></div> <p class="MsoNormal" style="margin-bottom: 12pt;"><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif"; color: blue;" lang="EN-US">Here is the round about answer to your second question. </span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif"; color: blue;" lang="EN-US">dn:CN=Denied RODC Password Replication Group,CN=Users,DC=trouble,DC=loc
>member: CN=Read-only Domain Controllers,CN=Users,DC=trouble,DC=loc
>member: CN=Group Policy Creator Owners,CN=Users,DC=trouble,DC=loc
>member: CN=Domain Admins,CN=Users,DC=trouble,DC=loc
>member: CN=Cert Publishers,CN=Users,DC=trouble,DC=loc
>member: CN=Enterprise Admins,CN=Users,DC=trouble,DC=loc
>member: CN=Schema Admins,CN=Users,DC=trouble,DC=loc
>member: CN=Domain Controllers,CN=Users,DC=trouble,DC=loc
>member: CN=krbtgt,CN=Users,DC=trouble,DC=loc</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif"; color: blue;" lang="EN-US">--</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif"; color: blue;" lang="EN-US">O'Reilly Active Directory Fourth Edition - </span><span lang="EN-US"></span><span style="font-size: 10pt; font-family: "Arial","sans-serif";"><a moz-do-not-send="true" href="http://www.joeware.net/win/ad4e.htm">http://www.joeware.net/win/ad4e.htm</a></span><span style="font-size: 10pt; font-family: "Arial","sans-serif"; color: blue;" lang="EN-US"> </span><span lang="EN-US">
<o:p></o:p></span></p> <div class="MsoNormal" style="text-align: center;" align="center"><span lang="EN-US"> <hr align="center" size="2" width="100%"></span></div> <p class="MsoNormal"><b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US">From:</span></b><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US"> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">ActiveDir-owner@mail.activedir.org</a> [</span><span lang="EN-US"></span><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";"><a moz-do-not-send="true" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir-owner'+'@'+'mail'+'.activedir')".org">mailto:ActiveDir-owner@mail.activedir.org</a></span><span style="font-size: 10pt; font-family: "Tahoma","sans-serif";" lang="EN-US">] <b>On Behalf Of </b>Tony Gordon<b>
Sent:</b> Friday, January 02, 2009 3:36 PM<b>
To:</b> <a class="moz-txt-link-abbreviated" href="javascript:window.location.replace('ma'+'ilto:'+'ActiveDir'+'@'+'mail'+'.activedir')".org">ActiveDir@mail.activedir.org</a><b>
Subject:</b> [ActiveDir] RODC and computer accounts that are allowed to have their creds replicated.</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">
We are planning to deploy RODCs to the regional offices. We have a relatively painless way to automatically populate the groups that allow "caching" the creds with the user accounts for each RODC. Computer accounts present more of a challenge. One of the thoughts is to just put domain computers group into the "Allowed RODC Password Replication" Group.</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">
What are the specific risks we would be incurring in that scenario?</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">
Is there a scenario where another DC (RO or RW) would auth to a particular RODC and in doing so cause to have its password replicated to an RODC?</span><span lang="EN-US">
</span><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">
How did other people that deployed RODCs dealt with this issue.</span><span style="font-size: 10pt; font-family: "AR Sans Serif","serif";" lang="EN-US">
Thank you, Tony. </span><span lang="EN-US">
<img id="_x0000_i1028" src="cid:part2.08020901.09000903@pacbell.net" border="0" height="60" width="60"></span><b><span style="font-size: 10pt; font-family: "Arial","sans-serif";" lang="EN-US">
Tony Gordon </span></b><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";" lang="EN-US">
Windows 2003 & 2000 MCSE, Windows 2003 MCSA, PMP
ITS Infrastructure Engineering
Hewitt Associates | 100 Half Day Road | Lincolnshire, IL 60069 | USA
Tel 847.295.5000 x50526 | Fax 847.554.1574
tony dot gordon at hewitt dot com | </span><span lang="EN-US"></span><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";"><a moz-do-not-send="true" href="www.hewitt.com">www.hewitt.com</a> <o:p></o:p></span></p> <div class="MsoNormal" style="text-align: center;" align="center"><span lang="EN-US"> <hr align="center" size="2" width="100%"></span></div> <p class="MsoNormal"><span style="font-size: 7.5pt; font-family: "Arial","sans-serif";" lang="EN-US">
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