[Bug 2050874] [NEW] "Illegal characters in username" breaks sftp upload

[Jakob Lund]

Public bug reported:

A new error message appeared in 1:8.2p1-4ubuntu0.11, "remote username
contains invalid characters".

The underlying commit seems to be this:
https://github.com/openbsd/src/commit/ba05a7aae989020b8d05cc93cc6200109bba5a7b


I need to work with an sftp connection where the username includes "|". The lftp client uses ssh to connect, triggering the error.

It's possible to whitelist the username by adding it to a config file
(e.g. ~/.ssh/config), but in that case, there's no obvious way to set
the password.


I suppose this is in fact a feature more than it is a bug, but it is really inconvenient. Any hints on how to handle it would be welcome.


Regards,
Jakob Lund


Ubuntu 20.04.3 LTS

openssh-client:
  Installed: 1:8.2p1-4ubuntu0.11

lftp:
  Installed: 4.8.4-2build3

** Affects: openssh (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/2050874

Title:
  "Illegal characters in username" breaks sftp upload

Status in openssh package in Ubuntu:
  New

Bug description:
  A new error message appeared in 1:8.2p1-4ubuntu0.11, "remote username
  contains invalid characters".

  The underlying commit seems to be this:
  https://github.com/openbsd/src/commit/ba05a7aae989020b8d05cc93cc6200109bba5a7b

  
  I need to work with an sftp connection where the username includes "|". The lftp client uses ssh to connect, triggering the error.

  It's possible to whitelist the username by adding it to a config file
  (e.g. ~/.ssh/config), but in that case, there's no obvious way to set
  the password.

  
  I suppose this is in fact a feature more than it is a bug, but it is really inconvenient. Any hints on how to handle it would be welcome.


  Regards,
  Jakob Lund


  Ubuntu 20.04.3 LTS

  openssh-client:
    Installed: 1:8.2p1-4ubuntu0.11

  lftp:
    Installed: 4.8.4-2build3

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