Hello, I am the domain owner of debigare.com. I would like to make you aware that Comodo CA took more than 5 days to revoke certificates they had signed for my domain and subdomains after requesting them to do through their sslabuse email address, past the 24 hours maximum mentioned in the Baseline Requirements as stipulated in section 4.9.1.1.
For context, I was previously using Cloudflare's Universal SSL feature, but disabling it did not revoke the old certificates that had not yet expired, but simply removed them from its system, and some of the certificates were still valid for more than 6 months. I first attempted to contact Cloudflare's support to ask them to revoke the certificates themselves on September 6 at 7:43 UTC. This only led to irrelevant responses and confused customer support agents that had no idea what I was talking about, and this appeared to go nowhere. I eventually got a response from them on September 11 at 5:53 UTC that they would request CAs to perform the revocation, but that was after I did so myself, and I never got a status report back afterwards. There were two CAs affected by this issue. The vast majority of certificates were signed by Comodo CA, and the rest by DigiCert. I did not run into any issues with DigiCert (they in fact proactively checked with Cloudflare my claim and revoked the certificates before I even had the chance to attempt their domain ownership challenge), but Comodo CA was another story entirely. My first request to Comodo CA to revoke the certificates for debigare.com and all of its subdomains was on September 8 at 4:37 UTC. I did not get a reply until September 9 at 15:53 UTC stating that the certificates have been revoked. Not only was this past the 24 hours requirement, but it was also false, as only the most recent certificates had been revoked, not all of them. I mentioned to them their mistake on September 10 at 5:55 UTC with a full list of affected certificates just in case my initial request was unclear to them, and never got a reply back. I did, however, notice that the certificates eventually got revoked on September 13 at 16:04 UTC according to their Certificate Transparency logs, a fact that I only discovered on September 15. Assuming the log is correct, that would be a delay of more than 3 days after notifying them of the incomplete revocation, more than 5 days after my initial request to them, and more than a week until I finally noticed the problem was fixed. It's also worth noting that throughout this entire series of events, Comodo CA never requested proof of domain ownership beyond the evidence I initially provided, so that cannot explain the delays. One detail that I'm not sure about is why my initial evidence for domain ownership was apparently sufficient for Comodo CA but not for DigiCert. On this regard, the only evidence I provided to both of them was that the email address I used to contact them matched the contact information on my website. (My emails were protected with SPF, DKIM and DMARC for authenticity.) For some reason, DigiCert believed that this evidence did not met the Baseline Requirements for my request, a claim that I am currently unable to verify as I cannot find anything of the sort in them. You can read the full story on my blog, which I hope will be sufficient to prove my identity: https://www.debigare.com/4-unexpected-issues-i-encountered-upon-switching-web-hosts/ I can also provide a full copy of the email exchange I had with Comodo CA as evidence on request. Guillaume Fortin-Debigaré _______________________________________________ dev-security-policy mailing list dev-security-policy@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-security-policy
