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WHD SSL - firefox complains about ephemeral_dh_key

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Hello, I used porticle and generated a keypair, imported our domain root cert and also submitted a cert request through our internal domain CA.  I got the certificate back fine and it works great in Chrome / IE / Edge.  Those browesers all show secured and nothing wrong with the cert.  Its Sha256 and showing connection with the server at TLS 1.2.

 

However if I use Firefox ESR 38.2.1 I get this strange message:

error ssl_error_weak_server_ephemeral_dh_key

 

Found this:

 

https://support.mozilla.org/en-US/questions/1067995

 

The way around it was in firefox about:config

search for security.ssl3.dhe_rsa_aes and change both the 128 and 256 to false.

Now it works fine in Firefox.

 

However it sounds like this could be a legitimate vulnerability according to this site: https://weakdh.org/

 

Do you think there is an alternate way to perform the certificate update in Porticle to avoid this?


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