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vRealize Orchestrator : How to Fix ssl_error_weak_server_ephemeral_dh_key

Recently encountered the error when trying to browse the configuration page of vRealize Orchestrator

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

 

Quick Workaround from VMware:

– Update CIPHER suites accepted by Orchestrator server

LOCATION:
/etc/vco/app-server/server.xml
/etc/vco/configuration/server.xml

FROM:
ciphers=”TLS_DHE_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_DSS_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA,TLS_DHE_RSA_WITH_AES_128_CBC_SHA,TLS_DHE_DSS_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA” />

TO:
ciphers=”TLS_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA” />

– Restart Orchestrator services

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