Random Common Names in certificates issued by Firebase Hosting

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Nicolai

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Dec 12, 2017, 10:01:04 AM12/12/17
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Hi

I've recently deployed a couple of sites to Firebase Hosting. I noticed that the TLS/SSL certificates are issued to seemingly random domain names (Common Names) which I think are hosted by Firebase or have been in the past.

Inspecting one of these domains I find that *their* certificates are issued to yet another Common Name.

Is this a known issue?

Michael Bleigh

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Dec 12, 2017, 10:59:11 AM12/12/17
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Firebase Hosting shares certificates between multiples sites. The common name is populated with one of the domains at random, with the other domains getting populated in the subject alternate names.

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