Are you using CAA records?

With the approval of ballot 187 the Certificate Authorities must check and respect the CAA records that are found in the DNS of a domain. This additional check is active since September 17, 2017. CAA stands for Certification Authority Authorization and  is a standard designed to help the owners of a domain by preventing the issuance of rogue or unauthorized SSL/TLS certificates for that domain.

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Don’t trust all SSL / TLS certificates

Earlier I did a story about CSR checkers from CA’s and their resellers. This was a nice thing to do and an eye opener for some people. I went for the certificate checkers no! I generated my own CA and self-signed certificate and checked some websites with it.

In my FakeCA root certificate and the leaf certificate on it, I set some XSS information. A simple JavaScript alert. You easily can do this with OpenSSL for example. So I setup my test site and went testing. It wasn’t very difficult to find my first vulnerable website.


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