[Bug 2929] New: OpenSSH server should not send the SSH_MSG_EXT_INFO message after rekeying

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=2929

            Bug ID: 2929
           Summary: OpenSSH server should not send the SSH_MSG_EXT_INFO
                    message after rekeying
           Product: Portable OpenSSH
           Version: 7.7p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: sshd
          Assignee: unassigned-bugs at mindrot.org
          Reporter: jjelen at redhat.com

The RFC 8308 specifies, that the SSH_MSG_EXT_INFO message should be
sent after the *first* SSH_MSG_NEWKEYS message, while the OpenSSH
server sends it also after the rekey:

>    o  As the next packet following the server's first SSH_MSG_NEWKEYS.

Side note:
The draft-ssh-ext-info-04  from [1] is already RFC [2], so the page
could make use of an update. Also the draft-rsa-dsa-sha2-256-03 is
already RFC [3].

[1] http://www.openssh.com/specs.html
[2] https://tools.ietf.org/html/rfc8308
[3] https://tools.ietf.org/html/rfc8332

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