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Posted to dev@mina.apache.org by "Robert Varga (JIRA)" <ji...@apache.org> on 2018/08/10 20:21:00 UTC

[jira] [Created] (SSHD-840) Unknown commands cause IllegalStateException instead of being correctly handled

Robert Varga created SSHD-840:
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             Summary: Unknown commands cause IllegalStateException instead of being correctly handled
                 Key: SSHD-840
                 URL: https://issues.apache.org/jira/browse/SSHD-840
             Project: MINA SSHD
          Issue Type: Bug
    Affects Versions: 1.6.0
            Reporter: Robert Varga
             Fix For: 2.0.0


As [https://github.com/CESNET/libnetconf2/issues/68] shows, MINA SSHD has a different behavior than OpenSSH when faced unknowns – in this case coming from a buggy server.

While OpenSSH was able to establish a session, OpenDaylight (using SSHD 1.6.0) was not – throwing an IllegalStateException.

Rather than throwing an exception, send an SSH_MSG_UNIMPLEMENTED as specified by [https://tools.ietf.org/html/rfc4253#section-11.4] .



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