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Bug 643616 - sftp should fallback to sshv1 if server doesn't support sshv2
Summary: sftp should fallback to sshv1 if server doesn't support sshv2
Keywords:
Status: CLOSED NOTABUG
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: openssh
Version: 6.0
Hardware: All
OS: Linux
low
medium
Target Milestone: rc
: ---
Assignee: Jan F. Chadima
QA Contact: BaseOS QE Security Team
URL:
Whiteboard:
Depends On: 643615
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-10-16 11:36 UTC by Miroslav Vadkerti
Modified: 2010-11-08 12:32 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 643615
Environment:
Last Closed: 2010-11-08 12:32:39 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Miroslav Vadkerti 2010-10-16 11:36:21 UTC 
+++ This bug was initially created as a clone of Bug #643615 +++

Description of problem:
sftp doesn't fallback to protocol SSHv1 if SSHv2 not available.

Version-Release number of selected component (if applicable):
openssh-4.3p2-58.el5

How reproducible:
100%

Steps to Reproduce:
1. Configure sshd to use only protocol 1
2. try to connect with sftp
  
Actual results:
sftp fails:
Connecting to localhost...
Protocol major versions differ: 2 vs. 1
Couldn't read packet: Connection reset by peer


Expected results:
sftp fallbacks to protocol 1

Additional info:
This seems to be an upstream issue (reproduced on F13). This is also reproducible on RHEL6
Comment 2 Jan F. Chadima 2010-11-08 12:32:39 UTC 
The problem is because the protocol 1 does not know anything about sftp. 
The correct usage of sftp on the protocol 1 is sftp -s /usr/libexec/openssh/sftp-server -o protocol 1 host
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