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List:       openssh-bugs
Subject:    [Bug 1719] New: Debug server prints debug messages on client
From:       bugzilla-daemon () bugzilla ! mindrot ! org
Date:       2010-02-27 19:59:30
Message-ID: bug-1719-705 () http ! bugzilla ! mindrot ! org/
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https://bugzilla.mindrot.org/show_bug.cgi?id=1719

           Summary: Debug server prints debug messages on client
           Product: Portable OpenSSH
           Version: 5.4p1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: sshd
        AssignedTo: unassigned-bugs@mindrot.org
        ReportedBy: petesea@bigfoot.com


A server started with debugging options (eg "sshd -e -ddd -p4242") will
print debug and "Environment" messages on the client:

   $ ssh -p4242 127.0.0.1 'date'
   Environment:
     USER=...
     LOGNAME=...
     HOME=...
     PATH=...
     MAIL=...
     SHELL=...
     SSH_CLIENT=...
     SSH_CONNECTION=...
   debug3: channel 0: close_fds r -1 w -1 e -1 c -1
   Sat Feb 27 11:52:32 PST 2010

It's often useful to start a debug server to help track down problems
without interfering with the client... and those extra client-side
debug and "Environment" messages can cause issues for things that
indirectly run ssh (like cvs and svn) if they aren't expecting the
output.

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