Ubuntu
openssh package

  1. Bug #1574415
  2. Comment #0

Comment 0 for bug 1574415

Revision history for this message
TJ (tj) wrote :

After upgrade to 16.04 ssh client will not connect to any host, reporting

/home/tj/.ssh/config line 109: Bad protocol spec '1'.

The entry is:

Host ups-01
Hostname 10.254.0.1
User hostmaster
IdentityFile ~/.ssh/id_hostmaster
IdentitiesOnly yes
Protocol 1

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 found.

This will especially affect connections to embedded devices - in this case it is an ssh server on a management VLAN in a network-attached 32-port switched Cabinet Distribution Unit (CDU) that cannot be upgraded, and only supports Protocol 1.

According to the 16.04 Release Notes protocol 1 requires the openssh-client-ssh1 package with the ssh1 binary.