openssh bugs - Nov 2010 - [Bug 1835] New: sftp should fallback to sshv1 if server doesn't support sshv2

https://bugzilla.mindrot.org/show_bug.cgi?id=1835

           Summary: sftp should fallback to sshv1 if server doesn't
                    support sshv2
           Product: Portable OpenSSH
           Version: 5.6p1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: sftp
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: jchadima at redhat.com


In the case when the server supports protocol 1 only and the client
supports 2,1 ssh switches automatically to protocol 1, sftp exits with:
"Protocol major versions differ: 2 vs. 1"

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https://bugzilla.mindrot.org/show_bug.cgi?id=1835

Darren Tucker <dtucker at zip.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dtucker at zip.com.au

--- Comment #1 from Darren Tucker <dtucker at zip.com.au> 2010-11-08
22:12:40 EST ---
I can't reproduce: as long as the client knows the path to sftp-server
it works for me:

$ sftp -v -s /usr/local/libexec/sftp-server -o protocol=2,1 localhost 
OpenSSH_5.6p1, OpenSSL 0.9.7l 28 Sep 2006
[...]
debug1: Remote protocol version 1.5, remote software version
OpenSSH_5.6
debug1: match: OpenSSH_5.6 pat OpenSSH*
debug1: Local version string SSH-1.5-OpenSSH_5.6
[...]
sftp> version
SFTP protocol version 3

If the client doesn't have a path for sftp-server and is not given the
"-1" option then it doesn't work for a different reason: SSHv1
does not
have subsystems so attempting to invoke the "sftp" command via SSHv1
invokes the client rather than the server.

Could you please reproduce with client-side debugging enabled (sftp
-vvv)?

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jchadima at redhat.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jchadima at redhat.com
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #2 from jchadima at redhat.com 2010-11-08 23:19:54 EST ---
Sorry, I've tested old version of openssh.

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jchadima at redhat.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #3 from jchadima at redhat.com 2010-11-08 23:28:00 EST ---
Caused by the absent -s parameter

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