openssh bugs - Jul 2018 - [Bug 2886] New: ssh-copy-id appears to hang indefinitely when ssh multiplexing is enabled, and it permits passwordless login

https://bugzilla.mindrot.org/show_bug.cgi?id=2886

            Bug ID: 2886
           Summary: ssh-copy-id appears to hang indefinitely when ssh
                    multiplexing is enabled, and it permits passwordless
                    login
           Product: Portable OpenSSH
           Version: 6.6p1
          Hardware: amd64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P5
         Component: ssh-copy-id
          Assignee: unassigned-bugs at mindrot.org
          Reporter: ahmet.mercan at serbestinternet.com

After a recent successfull login to an openssh-server, if you use
ssh-copy-id command with multiplexing enabled ssh client, it hangs
indefinitely, and Ctrl-C can't terminate the command.

Ssh client's .ssh/config file is set as:

Host *
ControlMaster auto
ControlPath ~/.ssh/sockets/%r@%h-%p
ControlPersist 30


Furthermore, if you try to login same server within the above timeout
duration, you can successfully login without password. But weirdly, no
authorized_keys file is created on the remote server.

Our ssh client is openssh-clients-6.6.1p1-25.el7_2.x86_64 on Centos
7.2.

Ssh servers which we successfully login to without passwords are
openssh-server-7.4p1-11.el7.x86_64 (Centos 7.4),
openssh-server-7.4p1-16.el7.x86_64 (Centos 7.5),
openssh-server-5.3p1-123.el6_9.x86_64 (Centos 6.10). Ssh-servers are at
default settings set by distribution installers.

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Ahmet Mercan <ahmet.mercan at serbestinternet.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|ssh-copy-id appears to hang |ssh-copy-id appears to hang
                   |indefinitely when ssh       |indefinitely when ssh
                   |multiplexing is enabled,    |multiplexing is enabled
                   |and it permits passwordless |
                   |login                       |

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Philip Hands <phil at hands.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |DUPLICATE
             Status|NEW                         |RESOLVED
                 CC|                            |phil at hands.com

--- Comment #1 from Philip Hands <phil at hands.com> ---
Sorry about not replying to this earlier.

This seems to be a duplicate of bug #2488 (fixed)
Assuming that's the case, I'll close this bug now, but please feel free
to reopen it, or submit a new one if it turns out that it was not fixed
by that change.

Cheers, Phil.

*** This bug has been marked as a duplicate of bug 2488 ***

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Damien Miller <djm at mindrot.org> changed:

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

--- Comment #2 from Damien Miller <djm at mindrot.org> ---
close bugs that were resolved in OpenSSH 8.5 release cycle

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