"/bin/bash: permission denied" using Cygwin ssh/sshd under WinXP 2003 x64: resolved

[Brian Kasper]

Jason --

Thanks for replying.  I've attached the output of "cygcheck -s -v -r".

Frustratingly, it appears that after a reboot (required because my 
company pushed some updates to my system), ssh to localhost no longer works.

If I stop the sshd service, start a command shell as "sshd_server", 
start bash in that shell, and then run "/usr/sbin/sshd -d" I can see the 
debug output from sshd.  Here's what I believe is the pertinent bit of 
that debug output:

Failed none for kasper from 127.0.0.1 port 4056 ssh2
debug1: userauth-request for user kasper service ssh-connection method 
publickey
debug1: attempt 1 failures 1
debug1: test whether pkalg/pkblob are acceptable
debug1: temporarily_use_uid: 1003/513 (e=1014/513)
seteuid 1003: Permission denied
debug1: do_cleanup

In the bash window from which I run ssh, I see this:

~ 506 $ ssh localhost
Connection closed by 127.0.0.1

It appears to be the failing "seteuid 1003" call that's the proximal 
cause of the failure.

If, however, I run "/usr/sbin/sshd -d" in a command prompt + bash 
session started as user "kasper", everything works:

~ 508 $ ssh localhost
Enter passphrase for key '/home/kasper/.ssh/id_rsa':
Warning: No xauth data; using fake authentication data for X11 forwarding.
Last login: Thu Dec 14 11:37:10 2006 from 127.0.0.1
Fanfare!!!
You are successfully logged in to this server!!!
debug1: permanently_set_uid: 1003/513
Environment:
[some environment vars snipped]
   CYGWIN=binmode ntsec tty
   USER=kasper
   LOGNAME=kasper
   HOME=/home/kasper
   MAIL=/var/spool/mail/kasper
   SHELL=/bin/bash
   SSH_CLIENT=127.0.0.1 4083 22
   SSH_CONNECTION=127.0.0.1 4083 127.0.0.1 22
   SSH_TTY=/dev/tty3
   TERM=ansi
Parsing .bash_profile ....  Done.
~ 501 $

I used both ssh-host-config and ssh-user-config to set up sshd.  I did 
not use privilege separation, but I did configure sshd to run as a service.

The other problems I've been seeing are a Windows "Error 1062" message 
when trying to start sshd and the "/bin/bash: permission denied" error I 
mentioned in my previous post.  I thought the "/bin/bash: permission 
denied" error was resolved, but this failure also appears to involve 
permissions.

I have a feeling most if not all the problems are caused by interactions 
with the WinXP 2003 x64 security/permissions system, which I believe are 
the same as those for WinXP Server 2003.

-Brian

DePriest, Jason R. wrote:
> On 12/13/06, Brian Kasper  wrote:
>> I've been having terrible problems getting Cygwin ssh/sshd to work under
>> the x64 version of WinXP 2003 SP1.
> 
> First
>> Problem reports:       http://cygwin.com/problems.html
> (attach cygcheck -s -v -r output)
> 
> Did you install sshd with the ssh-host-config script?
> 
> Did you use privilege separation?
> 
> -Jason
> 

-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: cygcheck.txt
URL: <http://cygwin.com/pipermail/cygwin/attachments/20061214/c409f103/attachment.txt>
-------------- next part --------------
--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/