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

[ Christian Ehrhardt ]

Will be in 7.7p2 per (next stable release)
  https://github.com/openssh/openssh-portable/commit/484fc023af92ee30bc99eb9798235a00e8f929cc

Upstream Bug:
  https://bugzilla.mindrot.org/show_bug.cgi?id=2851

Seems to be broken in 7.7 only so no need to SRU.

** Bug watch added: OpenSSH Portable Bugzilla #2851
   https://bugzilla.mindrot.org/show_bug.cgi?id=2851

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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 openssh package in Ubuntu:
  Triaged

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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