WLS and EM 12c: Accessing EM and Weblogic Console URL in Browser Gives Error "ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY"

(Doc ID 2054204.1)

Last updated on JUNE 27, 2016

Applies to:

Oracle WebLogic Server - Version 10.3 and later
Enterprise Manager Base Platform - Version 12.1.0.1.0 and later
Information in this document applies to any platform.

Symptoms

Accessing Oracle Weblogic console URL (https://<hostname>:port/console) in browser gives the following error:

In Chrome Browser:
Server has a weak, ephemeral Diffie-Hellman public key
ERR_SSL_WEAK_SERVER_EPHEMERAL_DH_KEY

In Firefox Browser:
SSL received a weak ephemeral Diffie-Hellman key in Server Key Exchange handshake message.
(Error code: sl_error_weak_server_ephemeral_dh_key)

Similar error are shown when accessing the EM console URL using the managed server port as below:

https://<hostname>:<port>/em

Enterprise Manager (EM) 12c Cloud Control uses Oracle WebLogic Server 10.3.6 and this also occurs in these environments.

 

Changes

Recently updated to a new client browser version.

Cause

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