SSH login with "MACs=hmac-md5" option from RHEL7.4 SSH client to RHEL7.4 SSH server is not rejected

Solution Verified - Updated -

Issue

SSH login with "MACs=hmac-md5" option from RHEL7.4 SSH client to RHEL7.4 SSH server is not rejected. Release Notes for Red Hat Enterprise Linux 7.4 (Chapter 53) states that hmac-md5 has been removed.
Therefore, we expect that SSH login with "MACs=hmac-md5" option is rejected. In addition, SSH login with "MACs=hmac-md5" option from RHEL7.3 SSH client to RHEL7.4 SSH server was rejected with a message "no matching mac found: client hmac-md5 server...".

Environment

  • Red Hat Enterprise Linux 7.4
  • openssh-7.4p1-16.el7

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