"Issued to" and "Domain Name" doesn't match but still valid and accepted by all major browsers without any warning.

While previewing my blog post in Blogger, I noticed that my blog was previewed via SSL. When I checked the certificate information, I noticed that "Issued To" and "Domain Name" didn't match. Here's a screenshot.

Blogger SSL Certificate

Domain name was techronak.blogspot.com but SSL certificate was issued to *.googleusercontent.com and the best thing was my browser (Chromium) didn't issue any kind of SSL warning.

How does this kind of SSL Certificates work?

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    What does the 'Subject Alternative Names' section look like on the details tab? – USD Matt Mar 21 '14 at 18:26

Look closely at the certificate:

X509v3 Subject Alternative Name: 
 DNS:*.googleusercontent.com, DNS:*.blogspot.com, DNS:*.bp.blogspot.com,
 DNS:*.commondatastorage.googleapis.com, DNS:*.doubleclickusercontent.com,
 DNS:*.ggpht.com, DNS:*.googledrive.com, DNS:*.googlesyndication.com,
 DNS:*.storage.googleapis.com, DNS:blogspot.com, DNS:bp.blogspot.com,
 DNS:commondatastorage.googleapis.com, DNS:doubleclickusercontent.com,
 DNS:ggpht.com, DNS:googledrive.com, DNS:googleusercontent.com,
 DNS:static.panoramio.com.storage.googleapis.com, DNS:storage.googleapis.com
| improve this answer | |
  • Do you know why only the first item from the list is shown in the browser? – Burhan Ali Jun 10 '14 at 11:32
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    @BurhanAli Popular browsers don't show the first SAN in this situation, they show Common Name (CN) field from the certificate. This is a bug on their part, a legacy behavior that is now outdated. Lets hope they start to pick up a correct SAN in the near future. – kubanczyk Apr 2 '15 at 20:54

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