#602 - X2GoSession clobbers .ssh/known_hosts when add_to_known_hosts is set

X2Go Bug report logs - #602
X2GoSession clobbers .ssh/known_hosts when add_to_known_hosts is set

Reported by: Matteo Panella <m.panella@level28.org>

Date: Wed, 10 Sep 2014 07:55:01 UTC

Severity: normal

Tags: pending

Found in version 0.4.0.9

Fixed in version 0.5.0.0

Done: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Bug is archived. No further changes may be made.

X-Loop: owner@bugs.x2go.org
Subject: Bug#602: X2GoSession clobbers .ssh/known_hosts when add_to_known_hosts is set
Reply-To: Matteo Panella <m.panella@level28.org>, 602@bugs.x2go.org
Resent-From: Matteo Panella <m.panella@level28.org>
Resent-To: x2go-dev@lists.x2go.org
Resent-CC: X2Go Developers <x2go-dev@lists.x2go.org>
X-Loop: owner@bugs.x2go.org
Resent-Date: Wed, 10 Sep 2014 07:55:01 +0000
Resent-Message-ID: <handler.602.B.141033558916107@bugs.x2go.org>
Resent-Sender: owner@bugs.x2go.org
X-X2Go-PR-Message: report 602
X-X2Go-PR-Package: python-x2go
X-X2Go-PR-Keywords: 
Received: via spool by submit@bugs.x2go.org id=B.141033558916107
          (code B); Wed, 10 Sep 2014 07:55:01 +0000
Received: (at submit) by bugs.x2go.org; 10 Sep 2014 07:53:09 +0000
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on
	ymir.das-netzwerkteam.de
X-Spam-Level: 
X-Spam-Status: No, score=0.8 required=5.0 tests=BAYES_50,SPF_HELO_PASS,
	T_DKIM_INVALID autolearn=ham version=3.3.2
X-Greylist: delayed 466 seconds by postgrey-1.34 at ymir.das-netzwerkteam.de; Wed, 10 Sep 2014 09:53:07 CEST
Received: from tassadar.level28.org (tassadar.level28.org [94.23.70.31])
	by ymir.das-netzwerkteam.de (Postfix) with ESMTPS id 954365DEAB
	for <submit@bugs.x2go.org>; Wed, 10 Sep 2014 09:53:07 +0200 (CEST)
Received: from [88.40.90.233] (host22-22-static.52-88-b.business.telecomitalia.it [88.52.22.22])
	(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
	(No client certificate requested)
	by tassadar.level28.org (Postfix) with ESMTPSA id 371252F2141
	for <submit@bugs.x2go.org>; Wed, 10 Sep 2014 09:45:18 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=level28.org;
	s=default; t=1410335118;
	bh=9k89dPsbs/3g8PJnseljk3uewnBA290fGmW0IiOj6nI=;
	h=Date:From:To:Subject:From;
	b=orPiYuRPCHTBWdJa9TJGyuJvqK3Uux0K7DJgpnLqYJbmA7skCPgN8qQBD0wPqazkG
	 JbT9kZJ7m3IQDkeurC15AfBno/fakLCd4+LJfmsTkgzg9EIE7Ki7g2SoZfgoXZB3aD
	 EwLTPYlETl5nusGotTGN21ZewZCZIiyVaZjCMZRI=
Message-ID: <5410018E.3070803@level28.org>
Date: Wed, 10 Sep 2014 09:45:18 +0200
From: Matteo Panella <m.panella@level28.org>
MIME-Version: 1.0
To: submit@bugs.x2go.org
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit

Package: python-x2go Version: 0.4.0.9 Whenever a host key is registered using pyhoca-cli or pyhoca-gui, the $HOME/.ssh/known_hosts file gets clobbered: all keys whose type is not either ssh-dss or ssh-rsa (namely, ECDSA and Ed25519 host keys) are removed. Steps to reproduce: 1. register some ECDSA/Ed25519 host keys 2. backup .ssh/known_hosts 3. define a new profile in pyhoca-gui selecting "Store SSH host keys under (unique) X2Go session profile ID" 4. connect to the host and accept the host key 5. run a diff between the old known_hosts file and the current .ssh/known_hosts file Expected behaviour: there should _only_ be an addition for the new ssh host key registered by python-x2go and no other modification Actual result: there is an addition for the new host key registered by python-x2go and removals for all ecdsa and ed25519 host keys I suspect this is a problem with paramiko not understanding ECDSA and Ed25519 keys in known_hosts and summarily discarding them, nevertheless I'm raising the bug here because the x2go PPA for Ubuntu ships a custom version of paramiko for precise (also because it should probably be noted in the release notes and/or worked around in python-x2go if possible). Client OS Version: Ubuntu 12.04.5 (amd64) Package source: ppa:x2go/stable PyHoca-GUI Version: 0.4.0.9 (0.4.0.9-0~1107~ubuntu12.04.1) python-x2go Version: 0.4.0.9 (0.4.0.9-0~1122~ubuntu12.04.1) python-paramiko Version: 1.11.0-0~664~precise1 (from ppa:x2go/stable) The server bits are mostly irrelevant since this is purely a client-side bug, but it happened with the following server-side configuration: Server OS Version: Ubuntu 14.04.1 (amd64) Package source: ppa:x2go/stable Server x2goserver Version: 4.0.1.15 (4.0.1.15-0~847~ubuntu14.04.1) Server x2goserver-xsession Version: 4.0.1.15 (4.0.1.15-0~847~ubuntu14.04.1) Server nx-libs Version: 3.5.0.27 (2:3.5.0.27-0~446~ubuntu14.04.1) -- Matteo Panella

X2Go Developers <owner@bugs.x2go.org>. Last modified: Wed Oct 30 12:56:46 2024; Machine Name: ymir.das-netzwerkteam.de

X2Go Bug tracking system

Debbugs is free software and licensed under the terms of the GNU Public License version 2. The current version can be obtained from https://bugs.debian.org/debbugs-source/.

X2Go Bug report logs - #602 X2GoSession clobbers .ssh/known_hosts when add_to_known_hosts is set

X2Go Bug report logs - #602
X2GoSession clobbers .ssh/known_hosts when add_to_known_hosts is set