[Bug 1574415] Re: [16.04] ssh <host>: Bad protocol spec '1'
Launchpad Bug Tracker
1574415 at bugs.launchpad.net
Tue May 24 17:58:28 UTC 2016
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: openssh (Ubuntu)
Status: New => Confirmed
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[16.04] ssh <host>: Bad protocol spec '1'
Status in openssh package in Ubuntu:
After upgrade to 16.04 ssh client will not connect to any host,
/home/tj/.ssh/config line 109: Bad protocol spec '1'.
The entry is:
If this were an entry in /etc/ssh/ssh_config and the user had no
privileges to edit that file it could create a denial of service to
the ssh client (if the user doesn't know how to over-ride the config).
It would be helpful if the openssh-client postinst script were to grep
the standard config files (including for users) and add a warning to
the motd and syslog if any invalidated configuration statements are
This will especially affect connections to embedded devices - in this
case it is an ssh server on a management VLAN in one of several
network-attached Uninterruptable Power Supplies that cannot be
upgraded, and only support Protocol 1.
According to the 16.04 Release Notes protocol 1 requires the openssh-
client-ssh1 package with the ssh1 binary.
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