Thanks for putting this together Ryan. As some might be aware Amazon began a 
process earlier this year to remove use of this method. 
(https://aws.amazon.com/blogs/security/aws-certificate-manager-will-discontinue-whois-lookup-for-email-validated-certificates/)

We got feedback from customers that for some this is a non-trivial dependency 
to remove. It’s not uncommon for companies to have built automation on top of 
email validation. Based on the information we got I recommend a date of April 
30, 2025.

From: Servercert-wg <[email protected]> On Behalf Of Ben 
Wilson via Servercert-wg
Sent: Monday, September 16, 2024 9:16 AM
To: Pedro FUENTES <[email protected]>; CA/B Forum Server Certificate WG 
Public Discussion List <[email protected]>
Subject: RE: [EXTERNAL] [Servercert-wg] [EXTERNAL]- Sunsetting use of WHOIS to 
identify Domain Contacts


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Mozilla will endorse, too, if needed.
Thanks,
Ben

On Mon, Sep 16, 2024 at 9:06 AM Pedro FUENTES via Servercert-wg 
<[email protected]<mailto:[email protected]>> wrote:
OISTE would endorse this initiative


On 16 Sep 2024, at 16:32, Ryan Dickson via Servercert-wg 
<[email protected]<mailto:[email protected]>> wrote:

All,

In light of recent events where research from WatchTowr Labs demonstrated how 
threat actors could exploit WHOIS to obtain fraudulently issued TLS 
certificates [1] and follow-on discussions in MDSP [2][3], we drafted an 
introductory proposal [4] to sunset the use of WHOIS for identifying Domain 
Contacts.

The proposal sets a prohibition against relying on WHOIS to identify Domain 
Contacts beginning 11/1/2024.

While publicly-trusted CA Owners are required to disclose and maintain in-use 
DCV methods to the CCADB [5], the collected data lacks specificity, hindering 
our ability to assess the extent of reliance on WHOIS and the potential impact 
of transitioning away from it.

Feedback on the proposal (preferably using comments or suggestions on the Pull 
Request via GitHub) along with volunteers for endorsers would be appreciated.
Thanks,
Ryan

P.S., I apologize if this effort is redundant to discussions already taking 
place in the Forum, I was traveling last week and am catching up on email.

[1] 
https://labs.watchtowr.com/we-spent-20-to-achieve-rce-and-accidentally-became-the-admins-of-mobi/<https://urldefense.proofpoint.com/v2/url?u=https-3A__labs.watchtowr.com_we-2Dspent-2D20-2Dto-2Dachieve-2Drce-2Dand-2Daccidentally-2Dbecame-2Dthe-2Dadmins-2Dof-2Dmobi_&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=-bX5hBm1IdRDykQ-dBR8tsFRCM4v1VXUyG7RZa2WqPY&m=1CJcldkOKNaH6Tu9kiTliBmTMzTdtFrQ0USL5juRHSkA78re2Z_FuT3Hr1z1Cd6m&s=qZzpnP-57sE4nQ6LxHM50ULVrjSKSIk2Fccl0d8PESE&e=>
[2] 
https://groups.google.com/a/mozilla.org/g/dev-security-policy/c/FuOi_uhQB6U<https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_a_mozilla.org_g_dev-2Dsecurity-2Dpolicy_c_FuOi-5FuhQB6U&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=-bX5hBm1IdRDykQ-dBR8tsFRCM4v1VXUyG7RZa2WqPY&m=1CJcldkOKNaH6Tu9kiTliBmTMzTdtFrQ0USL5juRHSkA78re2Z_FuT3Hr1z1Cd6m&s=31lolz5JP-8ykEL9HDAxaX6AcVj3rFj7LwOwRxwFkZg&e=>
[3] 
https://groups.google.com/a/mozilla.org/g/dev-security-policy/c/mAl9XjieSkA<https://urldefense.proofpoint.com/v2/url?u=https-3A__groups.google.com_a_mozilla.org_g_dev-2Dsecurity-2Dpolicy_c_mAl9XjieSkA&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=-bX5hBm1IdRDykQ-dBR8tsFRCM4v1VXUyG7RZa2WqPY&m=1CJcldkOKNaH6Tu9kiTliBmTMzTdtFrQ0USL5juRHSkA78re2Z_FuT3Hr1z1Cd6m&s=37YIE6Jw_R8c8obIjNP3qo3yo9YW36r4WMZH76HyUGM&e=>
[4] 
https://github.com/cabforum/servercert/pull/548<https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_cabforum_servercert_pull_548&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=-bX5hBm1IdRDykQ-dBR8tsFRCM4v1VXUyG7RZa2WqPY&m=1CJcldkOKNaH6Tu9kiTliBmTMzTdtFrQ0USL5juRHSkA78re2Z_FuT3Hr1z1Cd6m&s=vBGh-YJqmgDPKGnq5cAcEuu__uSmeZaCK_EGoFkB-Kc&e=>
[5] 
https://docs.google.com/spreadsheets/d/1IXL8Yk12gPQs8GXiosXCPLPgATJilaiVy-f9SbsMA28/edit?gid=268412787#gid=268412787<https://urldefense.proofpoint.com/v2/url?u=https-3A__docs.google.com_spreadsheets_d_1IXL8Yk12gPQs8GXiosXCPLPgATJilaiVy-2Df9SbsMA28_edit-3Fgid-3D268412787-23gid-3D268412787&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=-bX5hBm1IdRDykQ-dBR8tsFRCM4v1VXUyG7RZa2WqPY&m=1CJcldkOKNaH6Tu9kiTliBmTMzTdtFrQ0USL5juRHSkA78re2Z_FuT3Hr1z1Cd6m&s=nHPN4vmJhl30c7Nh_y7NmG73eUtxjUstZR6YNcUH0o4&e=>

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