[Bug 1263358] Re: ssh client disregards KbdInteractiveAuthentication option

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: openssh (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1263358

Title:
  ssh client disregards KbdInteractiveAuthentication option

Status in “openssh” package in Ubuntu:
  Confirmed

Bug description:
  Even if keyboard-interactive authentication is disabled in .ssh/config
  or on the command-line, ssh(1) will go ahead and try it if supported
  by the server. (The client *does* respect PasswordAuthentication=no
  and PubkeyAuthentication=no.)

  Using Ubuntu 13.10 Server 64-bit.

  $ ssh  -v -o KbdInteractiveAuthentication=no 127.0.0.1
  OpenSSH_6.2p2 Ubuntu-6ubuntu0.1, OpenSSL 1.0.1e 11 Feb 2013
  debug1: Reading configuration data /home/user/.ssh/config
  debug1: /home/user/.ssh/config line 1: Applying options for 127.0.0.1
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug1: Connecting to 127.0.0.1 [127.0.0.1] port 123.
  debug1: Connection established.
  debug1: identity file /home/user/.ssh/id_rsa type 1
  debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-4096
  debug1: Checking blacklist file /etc/ssh/blacklist.RSA-4096
  debug1: identity file /home/user/.ssh/id_rsa-cert type -1
  debug1: identity file /home/user/.ssh/id_dsa type -1
  debug1: identity file /home/user/.ssh/id_dsa-cert type -1
  debug1: identity file /home/user/.ssh/id_ecdsa type -1
  debug1: identity file /home/user/.ssh/id_ecdsa-cert type -1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.2p2 Ubuntu-6ubuntu0.1
  debug1: Remote protocol version 2.0, remote software version OpenSSH_6.2p2 Ubuntu-6ubuntu0.1
  debug1: match: OpenSSH_6.2p2 Ubuntu-6ubuntu0.1 pat OpenSSH*
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug1: kex: server->client aes128-ctr hmac-md5-etm at openssh.com none
  debug1: kex: client->server aes128-ctr hmac-md5-etm at openssh.com none
  debug1: sending SSH2_MSG_KEX_ECDH_INIT
  debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
  debug1: Server host key: ECDSA xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx
  debug1: Host '[127.0.0.1]:123' is known and matches the ECDSA host key.
  debug1: Found key in /home/user/.ssh/known_hosts:50
  debug1: ssh_ecdsa_verify: signature correct
  debug1: SSH2_MSG_NEWKEYS sent
  debug1: expecting SSH2_MSG_NEWKEYS
  debug1: SSH2_MSG_NEWKEYS received
  debug1: Roaming not allowed by server
  debug1: SSH2_MSG_SERVICE_REQUEST sent
  debug1: SSH2_MSG_SERVICE_ACCEPT received
  debug1: Authentications that can continue: keyboard-interactive
  debug1: Next authentication method: keyboard-interactive
  Password:

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