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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Wildcard domains are already allowed. We can verify Wildcard DNS because a CNAME for *.domain.com is pointing to a record previously verified. This verification method is permitted under the definition of Authorization Domain Name (where the FQDN returned by a CNAME lookup can be used to verify the requested FQDN). Although <rnd>.domain.com isn’t necessarily distinguishable from *.domain.com, the validation ends up being the same because either its considered an Authorized Domain Name (under the definition) or it was validated as a random value in this new method. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>For example:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>*.domain.com -> dcv.example.com (validated under the Authorized Domain Name section)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><rnd>.domain.com ->validation.example.com (validated under this new section)<o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></a></p><p class=MsoNormal><span style='mso-bookmark:_MailEndCompose'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Because each is validated properly, tracking which exact section was used in the validation isn’t necessary.<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_MailEndCompose'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_MailEndCompose'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>Jeremy<o:p></o:p></span></span></p><p class=MsoNormal><span style='mso-bookmark:_MailEndCompose'><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'><o:p> </o:p></span></span></p><span style='mso-bookmark:_MailEndCompose'></span><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> Ryan Sleevi [mailto:sleevi@google.com] <br><b>Sent:</b> Friday, September 2, 2016 3:28 PM<br><b>To:</b> Jeremy Rowley <jeremy.rowley@digicert.com><br><b>Cc:</b> public@cabforum.org<br><b>Subject:</b> Re: [cabfpub] CNAME-based validation<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Jeremy,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Does this introduce risk for sites that use Wildcard DNS records? How would you propose mitigating that risk?<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Fri, Sep 2, 2016 at 2:26 PM, Jeremy Rowley <<a href="mailto:jeremy.rowley@digicert.com" target="_blank">jeremy.rowley@digicert.com</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'><div><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>I realized after reviewing my proposal that it will require a new method under the domain validation section. Therefore, I’m proposing we add the following as a new permitted method for domain validation:<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Add the following as Section 3.2.2.4.11:<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Confirming the Applicant’s control over the requested FQDN by appending a Random Value or Request Token as a sub domain to an Authorization Domain Name and pointing the CNAME record of the created sub domain to a FQDN verified by the CA using one of methods permitted under Section 3.2.2.4<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Looking for two endorsers.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='color:#888888'>Jeremy<o:p></o:p></span></p></div></div><p class=MsoNormal style='margin-bottom:12.0pt'><br>_______________________________________________<br>Public mailing list<br><a href="mailto:Public@cabforum.org">Public@cabforum.org</a><br><a href="https://cabforum.org/mailman/listinfo/public" target="_blank">https://cabforum.org/mailman/listinfo/public</a><o:p></o:p></p></blockquote></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>