[jira] Commented: (JAMES-385) Allow to prevent weak ciphers when using "useTLS"

["Stefano Bagnara (JIRA)" <se...@james.apache.org>]

    [ http://issues.apache.org/jira/browse/JAMES-385?page=comments#action_12317846 ] 

Stefano Bagnara commented on JAMES-385:
---------------------------------------

For James 3.0 we moved to newer cornerstone libraries.

Please try the latest code from svn.

You can find cornerstone sources here:
https://svn.apache.org/repos/asf/excalibur/trunk/cornerstone/sockets/impl/src/java/org/apache/avalon/cornerstone/blocks/sockets/TLSServerSocketFactory.java



> Allow to prevent weak ciphers when using "useTLS"
> -------------------------------------------------
>
>          Key: JAMES-385
>          URL: http://issues.apache.org/jira/browse/JAMES-385
>      Project: James
>         Type: Bug
>     Versions: 2.2.0
>  Environment: Linux, jdk 1.4
>     Reporter: Ralf Hauser
>     Priority: Critical
>  Attachments: Cornerstone.patch.zip
>
> http://james.apache.org/usingTLS_2_1.html and http://wiki.apache.org/james/UsingSSL explain how to setup a pop3s etc. describe how to secure a client connection to James.
>    openssl s_client -connect pops.mydom.com:995 -cipher EXPORT
> illustrates that this is possible with james.
> One might argue that a decent client will never ask the server to negotiate a weak cipher. But an attacker (man-in-the-middle) could remove stronger ciphers from the client's offered cipher list, and then break the weak cipher and e.g. obtain the user password to later hijack the account.
> Please amend the documentation how prevent this from happening by forcing james to only negotiate sessions with 128+ bit session key strength

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