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<p class="MsoNormal"><span style="color:black">Hi All,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:black">Below are the DRAFT minutes from the April 18th meeting of the Validation subcommittee.<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Meeting: April 18, 2024<o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b>Attendance: </b><b><o:p></o:p></b></p>
<p class="MsoNormal">Aaron Gable (Let's Encrypt), Aaron Poulsen (Amazon), Aggie Wang (TrustAsia), Andrea Holland (VikingCloud), Ben Wilson (Mozilla), Clint Wilson (Apple), Corey Bonnell (DigiCert), Corey Rasmussen (OATI), David Kluge (Google), Dimitris Zacharopoulos
(HARICA), Doug Beattie (GlobalSign), Dustin Hollenback (Microsoft), Enrico Entschew (D-TRUST), Eva Vansteenberge (GlobalSign), Gregory Tomko (GlobalSign), Gurleen Grewal (Google), Inigo Barreira (Sectigo), Johnny Reading (GoDaddy), Joseph Ramm (OATI), Mahua
Chaudhuri (Microsoft), Martijn Katerbarg (Sectigo), Michelle Coon (OATI), Miguel Sanchez (Google), Nargis Mannan (VikingCloud), Nate Smith (GoDaddy), Nome Huang (TrustAsia), Pekka Lahtiharju (Telia Company), Rollin Yu (TrustAsia), Roman Fischer (SwissSign),
Scott Rea (eMudhra), Thomas Zermeno (SSL.com), Wayne Thayer (Fastly), Wendy Brown (US Federal PKI Management Authority)<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Approval of Minutes:</b> <o:p></o:p></p>
<p class="MsoNormal">None<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b>Agenda:<o:p></o:p></b></p>
<ol style="margin-top:0in" start="1" type="1">
<li class="MsoListParagraphCxSpFirst" style="margin-bottom:0in;margin-left:0in;mso-add-space:auto;line-height:normal;mso-list:l2 level1 lfo7">
Status update on EVG automation improvement ballot – Ewa<o:p></o:p></li></ol>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level1 lfo8">
Waiting for additional feedback<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level1 lfo8">
Updating to the new EVG format and looking for endorsers<o:p></o:p></li></ul>
<p class="MsoListParagraphCxSpMiddle" style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal">
<o:p> </o:p></p>
<ol style="margin-top:0in" start="2" type="1">
<li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:0in;mso-add-space:auto;line-height:normal;mso-list:l2 level1 lfo7">
Status update on 3.2.2.4 (7) improvement ballot – Corey<o:p></o:p></li></ol>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level1 lfo8">
Ballot language will be circulated next week and looking for endorsers<o:p></o:p></li></ul>
<p class="MsoListParagraphCxSpMiddle" style="mso-margin-top-alt:0in;margin-right:0in;margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal">
<o:p> </o:p></p>
<ol style="margin-top:0in" start="3" type="1">
<li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:0in;mso-add-space:auto;line-height:normal;mso-list:l2 level1 lfo7">
Discussion on dns-account-01 draft – Corey, Wayne, Aaron, Roman, and Doug<o:p></o:p></li></ol>
<ul style="margin-top:0in" type="disc">
<li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level1 lfo8">
<a href="https://datatracker.ietf.org/doc/draft-ietf-acme-scoped-dns-challenges/00/">https://datatracker.ietf.org/doc/draft-ietf-acme-scoped-dns-challenges/00/</a><o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level1 lfo8">
RFC draft is still in early process so we should not reference it<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level1 lfo8">
Options are to wait for one more wave of the draft so it is more stable or create own ballot<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level1 lfo8">
Own ballot would be modification to Method 7 to allow 2 underscore labels <o:p></o:p></li></ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:.25in;mso-add-space:auto;line-height:normal;mso-list:l5 level2 lfo8">
Concerns with two arbitrary underscore labels with no constraints<o:p></o:p></li></ul>
</ul>
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="disc">
<ul style="margin-top:0in" type="circle">
<li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level3 lfo9">
Concern a CA changes to look for either double or single prefix and a subscriber doesn’t change their behavior, so the subscriber CNAME delegates underscore DNS challenge to another DNS operator and that DNS operator can CNAME subdomains to others
<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level3 lfo9">
Concerns about constraint of _acmechallenge is mixing ACME validation with generic validation<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level3 lfo9">
Low risk for allowing unconstrainted second underscore<o:p></o:p></li></ul>
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Ballot might be drafted to get feedback on adjustments<o:p></o:p></li></ul>
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<o:p> </o:p></p>
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Identifying DTPs in the context of domain validation – Corey, Aaron, Roman, Dimitris, and Clint<o:p></o:p></li></ol>
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Recap Method 18 identified external DNS and proxy that performs http no controlled by CAs<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level2 lfo9">
This discussion is limited on to what CAs can control<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level2 lfo9">
Review the methods for any third party components first, then review the TP components and choose which to address<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level2 lfo9">
Methods 18, 19, and 20 are similar with minor differences so the concerns will be the same<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level2 lfo9">
Additional concern TLS interception as a service like HTTP proxy<o:p></o:p></li><li class="MsoListParagraphCxSpMiddle" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level2 lfo9">
Method 7 other than the ones mentioned for 18, 19, and 20<o:p></o:p></li></ul>
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DTP they could use a DNS cache, but Cache on behalf of subscriber is fine, read through cache is a recursive resolver and look aside cache is unlikely<o:p></o:p></li></ul>
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Mehothd 18 should replace authorization domain name use for FQDN<o:p></o:p></li><li class="MsoListParagraphCxSpLast" style="margin-bottom:0in;margin-left:-.25in;mso-add-space:auto;line-height:normal;mso-list:l7 level2 lfo9">
<b>Action item</b>: GitHub item for method 7 using authorization domain name with no noted guardrails<o:p></o:p></li></ul>
</ul>
<p class="qt-qt-qt-qt-qt-qt-">Next meeting May 2<sup>nd</sup>.<o:p></o:p></p>
<p class="qt-qt-qt-qt-qt-qt-">Adjourn <o:p></o:p></p>
<p class="MsoNormal">Regards,<o:p></o:p></p>
<p class="MsoNormal">Andrea<o:p></o:p></p>
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