[Bug 1801128] Re: OpenSSH 7.7 -w tunnel bug

[Brian Murray]

Hello Adam, or anyone else affected,

Accepted openssh into cosmic-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/openssh/1:7.7p1-4ubuntu0.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.  Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-cosmic to verification-done-cosmic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-cosmic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance for helping!

N.B. The updated package will be released to -updates after the bug(s)
fixed by this package have been verified and the package has been in
-proposed for a minimum of 7 days.

** Changed in: openssh (Ubuntu Cosmic)
       Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-cosmic

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https://bugs.launchpad.net/bugs/1801128

Title:
  OpenSSH 7.7 -w tunnel bug

Status in openssh package in Ubuntu:
  Fix Released
Status in openssh source package in Cosmic:
  Fix Committed

Bug description:
  [Impact]

  A regression in OpenSSH 7.7 breaks tunnelling via the -w switch in the
  ssh command.

  [Test Case]

  # lxc launch ubuntu:cosmic tester && lxc exec tester bash

  # apt update && \
  apt dist-upgrade -y && \
  sed -i 's/PasswordAuthentication no/PasswordAuthentication yes/g' /etc/ssh/sshd_config && \
  service sshd restart && \
  echo ubuntu:ubuntu | chpasswd

  # ssh -w any ubuntu at localhost
  ubuntu at localhost's password: 
  Tunnel device open failed.
  Could not request tunnel forwarding.

  [Regression Potential]

  This is already fixed and tested upstream, and thus has little
  regression potential.

  [Original Description]

  Just upgraded to cosmic, which picks up OpenSSH 7.7.

  OpenSSH 7.7 has known bug
  https://bugzilla.mindrot.org/show_bug.cgi?id=2855 which is fixed in
  OpenSSH 7.8. It's a regression that completely breaks -w tunneling.

  The OpenSSH bug contains a trivial two-line patch to fix the bug. I
  downloaded the Ubuntu openssh package source, applied the patch and
  rebuilt, and can confirm that is does fix the problem.

  Any chance we could get this patch backported to Cosmic?

  ProblemType: Bug
  DistroRelease: Ubuntu 18.10
  Package: openssh-client 1:7.7p1-4
  ProcVersionSignature: Ubuntu 4.18.0-10.11-generic 4.18.12
  Uname: Linux 4.18.0-10-generic x86_64
  ApportVersion: 2.20.10-0ubuntu13
  Architecture: amd64
  Date: Thu Nov 1 09:36:16 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  RelatedPackageVersions:
   ssh-askpass N/A
   libpam-ssh N/A
   keychain N/A
   ssh-askpass-gnome N/A
  SSHClientVersion: OpenSSH_7.7p1 Ubuntu-4, OpenSSL 1.0.2n 7 Dec 2017
  SourcePackage: openssh
  UpgradeStatus: Upgraded to cosmic on 2018-11-01 (0 days ago)

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