[Bug 1771011] Re: Doesn't accept environment variable with underscore in its name in AuthorizedKeysFile

[Launchpad Bug Tracker]

This bug was fixed in the package openssh - 1:7.7p1-3

---------------
openssh (1:7.7p1-3) unstable; urgency=medium

  [ Colin Watson ]
  * Adjust git-dpm tagging configuration.
  * Remove no-longer-used Lintian overrides from openssh-server and ssh.
  * Add Documentation keys to ssh-agent.service, ssh.service, and
    ssh at .service.

  [ Juri Grabowski ]
  * Add rescue.target with ssh support.

  [ Christian Ehrhardt ]
  * Fix unintentional restriction of authorized keys environment options
    to be alphanumeric (closes: #903474, LP: #1771011).

 -- Colin Watson <cjwatson at debian.org>  Tue, 10 Jul 2018 16:07:16 +0100

** Changed in: openssh (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1771011

Title:
  Doesn't accept environment variable with underscore in its name in
  AuthorizedKeysFile

Status in portable OpenSSH:
  Unknown
Status in openssh package in Ubuntu:
  Fix Released

Bug description:
  If environment variable name defined in AuthorizedKeysFile contains underscore character (environment="FOO_BAR=1" ...), sshd refuses connection and throws following error:
  authorized_keys:1: bad key options: invalid environment string

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