Webinoly is just the perfect tool for NGINX experts. Give it a try!
0 votes
129 views
by Rookie

I received an email from cloudflare regarding let's encrypt cert chain change. What do we have to do at our end? Here's the email from Cloudflare:

Hi, 

We are reaching out to inform you about an upcoming change that will impact the device compatibility of Let’s Encrypt certificates issued after May 15th, 2024. We are reaching out to you because we identified that you are currently using Let’s Encrypt certificates through Universal SSL, Advanced Certificate Manager, Custom Certificates, or SSL for SaaS. We recommend that you familiarize yourself with the Let’s Encrypt change and make any necessary adjustments ahead of time.

Change Overview

Let’s Encrypt issues certificates through two chains: the ISRG Root X1 chain and the ISRG Root X1 chain cross-signed by IdenTrust’s DST Root CA X3. The cross-signed chain has allowed Let’s Encrypt certificates to become widely trusted, while the pure chain developed compatibility with various devices over the last 3 years, growing the number of Android devices trusting ISRG Root X1 from 66% to 93.9%. 

Let’s Encrypt announced that the cross-signed chain is set to expire on September 30th, 2024. As a result, Cloudflare will stop issuing certificates from the cross-signed CA chain on May 15th, 2024

Impact

The expiration of the cross-signed chain will primarily affect older devices (e.g. Android 7.0 and earlier) and systems that solely rely on the cross-signed chain and lack the ISRG Root X1 chain in their trust store. This change could result in certificate validation failures on these devices, potentially leading to warning messages or access problems for users visiting your website.

Impact to certificates issued through Universal SSL, Advanced Certificate Manager, or SSL for SaaS: 

To prepare for the CA expiration, after May 15th, Cloudflare will no longer issue certificates from the cross-signed chain. Certificates issued before May 15th will continue to be served to clients with the cross-signed chain. Certificates issued on May 15th or after will use the ISRG Root X1 chain. Additionally, this change only impacts RSA certificates. It does not impact ECDSA certificates issued through Let’s Encrypt. ECDSA certificates will maintain the same level of compatibility that they have today.  

Impact to certificates uploaded through Custom Certificates: 

Certificates uploaded to Cloudflare are bundled with the certificate chain that Cloudflare finds to be the most compatible and efficient. After May 15th, 2024, all Let’s Encrypt certificates uploaded to Cloudflare will be bundled with the ISRG Root X1 chain, instead of the cross-signed chain. Certificates uploaded before May 15th will continue to use the cross-signed chain until that certificate is renewed. 

Important Dates

May 15th, 2024: Cloudflare will stop issuing certificates from the cross-signed CA chain. In addition,  Let’s Encrypt Custom Certificates uploaded after this date will be bundled with the ISRG X1 chain instead of the cross-signed chain. 

September 30th, 2024: The cross-signed CA chain will expire. 

1 Answer

+1 vote
by Expert
Hi Seynt.

Don't worry! This is old news!

Here is the official announcement a little bit better explained: https://letsencrypt.org/2023/07/10/cross-sign-expiration
by Rookie
So webinoly's let's encrypt will still work with cloudflare?
by Expert
In short, what it means is that people using Android 7 (or earlier versions) might experience problems visiting sites with Let's Encrypt certs. It has nothing to do with Webinoly or Cloudflare.
Welcome to the Community site for Webinoly.

Our Optimized LEMP Web Server is a powerful set of commands for doing just about anything you could wish.

With Webinoly you can set up your NGINX web server in just one step.

* * * * * * *

To report a bug, please create a new issue on GitHub or ask a question here with the bug tag.
Webinoly Support Paypal Donations

PayPal · GitHub Sponsors · Bitcoin

It is very important that any visitor to the site read the disclaimer, terms of use and privacy and legal statement before start browsing.

...