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From "Nachiket Patil (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-13325) Bring back the accepted encryption protocols list as configurable option
Date Fri, 17 Mar 2017 20:25:42 GMT


Nachiket Patil commented on CASSANDRA-13325:

bq. My understand of poodle with TLS was that this is a product specific attack
You said it. Then lets deal with it in the application and not modify the java settings.

If we consider modifying JRE settings, we have to maintain another file and some settings
which is not a part of the package being deployed. This is not a problem for smaller clusters
but when cluster size is thousand nodes, this becomes operational pain.
If we add the `accepted_protocols` as configurable property and make is so that if not specified,
let java decide what protocol to negotiate, there shouldn't be any difference on yaml or other
settings unless you need to restrict the protocols.

> Bring back the accepted encryption protocols list as configurable option
> ------------------------------------------------------------------------
>                 Key: CASSANDRA-13325
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Configuration
>            Reporter: Nachiket Patil
>            Priority: Minor
> With CASSANDRA-10508, the hard coded list of accepted encryption protocols was eliminated.
For some use cases, it is necessary to restrict the encryption protocols used for communication
between client and server. Default JVM way of negotiations allows the best encryption protocol
that client can use. 
> e.g. I have set Cassandra to use encryption. Ideally client and server negotiate to use
best protocol (TLSv1.2). But a malicious client might force TLSv1.0 which is susceptible to
POODLE attacks.
> At the moment only way to restrict the encryption protocol is using the {{jdk.tls.client.protocols}}
systems property. If I dont have enough access to modify this property, I dont have any way
of restricting the encryption protocols.
> I am proposing bring back the accepted_protocols property but make it configurable. If
not specified, let the JVM take care of the TLS negotiations.

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