Comment Re: Who is eMudhra (Score 1) 11
They primarily manage company-internal CAs for big businesses, which they seem to do well. AFAICT, they noticed that their security infrastructure was compliant for managing a global CA, and thought they might as well also have that as a product. However, there are some operational differences between an enterprise CA and a public one, including that companies want to issue client certs to employees but nobody really does global client certs. That means that they had an intermediate CA for global client certs that they never used, but it was in the standard trust store, and nobody tested that it was handled right until Wayne just went through the standard trust store making sure a new certificate weakness detector didn't give false positives.
So eMudhra correctly handled all the certs they issued, and all the certs they used to sign them, but they got some extra CA certs trusted that they didn't really need, because it would make their side business more similar to their main business, and this caused a major problem.
Chances are that they actually got a real random number out of a HSM for the bad CA certs, but accidentally made the certs with the index of the random number instead of the actual number. (That is, they got the 4th random number and made a cert for 4 instead of the number.) I wouldn't be surprised if they stored the correct private key, which would have made leaf certs that didn't validate because the intermediate was wrong, but they never used it to find this problem.