https Azure websites return SEC_ERROR_OCSP_INVALID_SIGNING_CERT when accessed via Firefox [closed]

Question

I've noticed a problem today when accessing our https:// azurewebsites.net websites in Firefox.

The following sites (and I suspect any https azurewebsites.net site) fail on Firefox :

• https://easytees.azurewebsites.net/
• https://easyfurniture.azurewebsites.net/
• https://hello.azurewebsites.net/ (not one of ours)

returning :

Secure Connection Failed

An error occurred during a connection to easyfurniture.azurewebsites.net. Invalid OCSP signing certificate in OCSP response. Error code: SEC_ERROR_OCSP_INVALID_SIGNING_CERT

• The page you are trying to view cannot be shown because the authenticity of the received data could not be verified.
• Please contact the website owners to inform them of this problem.

The sites work fine in Chrome, Safari, and Tor browsers.

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Why do https://*.azurewebsites.net fail in this way in Firefox?

Answer 1

Microsoft has an active issue with this. Try going to https://microsoft.com or https://portal.azure.com in Firefox and you see the same behavior.

Open tickets:

• https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/12163379/
• https://developercommunity.visualstudio.com/content/problem/62465/receiving-a-sec-error-ocsp-invalid-signing-cert-wh.html

Expired certificate: https://twitter.com/vcsjones/status/869033508114661376