Perhaps the many CAs who are not using WHOIS would be able to help. If they 
were impacted, when would they feel a clock should start for reporting 
these incidents? Both infrastructure-impact, and potential misuse of 
certificates as an ongoing scope of unaudited TLDs is being elaborated upon.

So far I'm not seeing a reason for relying on the non-authoritative 
information within WHOIS to provide strong identity verification. Given 
there are CAs still believing it to be authoritative, could they elaborate 
on why?

- Wayne

On Friday, September 13, 2024 at 2:04:15 PM UTC+1 Roman Fischer wrote:

> Dear Claves,
>
>  
>
> Maybe many CAs (like SwissSign) are not using WHOIS anymore and thus don't 
> reply to this thread. 😉
>
>  
>
> Rgds
> Roman
>
>  
>
> *From:* [email protected] <[email protected]> *On Behalf Of 
> *Claves Nostrum
> *Sent:* Freitag, 13. September 2024 14:01
> *To:* [email protected]
> *Cc:* Hanno Böck <[email protected]>
> *Subject:* Re: Sources of Domain Contact Information?
>
>  
>
> I am a bit surprised that we have not seen anything from other CA on this, 
> Bugzilla's or comments on this discussion, surely others must be affected 
> to some extent, which would imply they need to audit whois-issuances for 
> TLD's with ""questionable" or invalid whois servers configured in their 
> lookup tooling. 
>
> Op donderdag 12 september 2024 om 10:25:03 UTC+2 schreef Hanno Böck:
>
> On Thu, 12 Sep 2024 09:21:07 +0200 
> Hanno Böck <[email protected]> wrote: 
>
> > But there's a larger question whether there even is a reliable "source 
> > of truth" for whois servers. Does IANA make any guarantees that the 
> > whois servers they advertise are operational, and under control of the 
> > respective TLD authority? 
>
> To answer myself: It appears multiple whois servers listed by IANA are 
> not operational. 
> This is true for the following TLDs: 
> cf ci dz ec gn gp hm iq ml na sb tk to uy xn--lgbbat1ad8j xn--mgbtx2b 
> xn--ygbi2ammx 
>
> It therefore strongly appears to me that there is currently no reliable 
> data source for whois servers, and therefore, it is unclear how domain 
> validation via whois can be implemented securely. 
>
> -- 
> Hanno Böck - Independent security researcher 
> https://itsec.hboeck.de/ 
> https://badkeys.info/ 
>
> -- 
>
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