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

version graph

Package: python-x2go; Maintainer for python-x2go is X2Go Developers <x2go-dev@lists.x2go.org>; Source for python-x2go is src:python-x2go.

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.

Full log


🔗 View this message in rfc822 format

X-Loop: owner@bugs.x2go.org
Subject: Bug#602: [X2Go-Dev] Bug#602: X2GoSession clobbers .ssh/known_hosts when add_to_known_hosts is set
Reply-To: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>, 602@bugs.x2go.org
Resent-From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Resent-To: x2go-dev@lists.x2go.org
Resent-CC: X2Go Developers <x2go-dev@lists.x2go.org>
X-Loop: owner@bugs.x2go.org
Resent-Date: Fri, 17 Oct 2014 11:30:01 +0000
Resent-Message-ID: <handler.602.B602.141354529613929@bugs.x2go.org>
Resent-Sender: owner@bugs.x2go.org
X-X2Go-PR-Message: followup 602
X-X2Go-PR-Package: python-x2go
X-X2Go-PR-Keywords: 
Received: via spool by 602-submit@bugs.x2go.org id=B602.141354529613929
          (code B ref 602); Fri, 17 Oct 2014 11:30:01 +0000
Received: (at 602) by bugs.x2go.org; 17 Oct 2014 11:28:16 +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=-1.9 required=5.0 tests=BAYES_00,URIBL_BLOCKED
	autolearn=ham version=3.3.2
Received: from freya.das-netzwerkteam.de (freya.das-netzwerkteam.de [88.198.48.199])
	by ymir.das-netzwerkteam.de (Postfix) with ESMTPS id 7042B5E0B9
	for <602@bugs.x2go.org>; Fri, 17 Oct 2014 13:28:15 +0200 (CEST)
Received: from grimnir.das-netzwerkteam.de (grimnir.das-netzwerkteam.de [78.46.204.98])
	by freya.das-netzwerkteam.de (Postfix) with ESMTPS id EB1F5D70;
	Fri, 17 Oct 2014 13:28:14 +0200 (CEST)
Received: from localhost (localhost [127.0.0.1])
	by grimnir.das-netzwerkteam.de (Postfix) with ESMTP id DC0063BB6E;
	Fri, 17 Oct 2014 13:28:14 +0200 (CEST)
X-Virus-Scanned: Debian amavisd-new at grimnir.das-netzwerkteam.de
Received: from grimnir.das-netzwerkteam.de ([127.0.0.1])
	by localhost (grimnir.das-netzwerkteam.de [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id puujkaEQaRUT; Fri, 17 Oct 2014 13:28:14 +0200 (CEST)
Received: from grimnir.das-netzwerkteam.de (localhost [127.0.0.1])
	by grimnir.das-netzwerkteam.de (Postfix) with ESMTPS id A8E913B92E;
	Fri, 17 Oct 2014 13:28:14 +0200 (CEST)
Received: from m-094.informatik.uni-kiel.de (m-094.informatik.uni-kiel.de
 [134.245.254.94]) by mail.das-netzwerkteam.de (Horde Framework) with HTTP;
 Fri, 17 Oct 2014 11:28:14 +0000
Date: Fri, 17 Oct 2014 11:28:14 +0000
Message-ID: <20141017112814.Horde.zPkyTl3ZNN32TX77gOz-Sg7@mail.das-netzwerkteam.de>
From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: Matteo Panella <m.panella@level28.org>, 602@bugs.x2go.org
In-Reply-To: <5410018E.3070803@level28.org>
User-Agent: Internet Messaging Program (IMP) H5 (6.2.2)
Accept-Language: en,de
Organization: DAS-NETZWERKTEAM
X-Originating-IP: 134.245.254.94
X-Remote-Browser: Mozilla/5.0 (X11; Linux x86_64; rv:32.0) Gecko/20100101
 Firefox/32.0 Iceweasel/32.0
Content-Type: multipart/signed; boundary="=_TxCGFECNYR4BKyGwcg8RXQ1";
 protocol="application/pgp-signature"; micalg=pgp-sha1
MIME-Version: 1.0
[Message part 1 (text/plain, inline)]
Hi Matteo,

On  Mi 10 Sep 2014 09:45:18 CEST, Matteo Panella wrote:

> 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)

This does not happen with python-paramiko 1.15.1 anymore. I will add a  
versioned dependency for that paramiko version to our upstream release  
python-x2go and then see how to fix our archives.

Thanks for notifying us!
Mike

-- 

DAS-NETZWERKTEAM
mike gabriel, herweg 7, 24357 fleckeby
fon: +49 (1520) 1976 148

GnuPG Key ID 0x25771B31
mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de

freeBusy:
https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xfb
[Message part 2 (application/pgp-signature, inline)]

Send a report that this bug log contains spam.


X2Go Developers <owner@bugs.x2go.org>. Last modified: Thu Mar 28 18:09:56 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/.

Copyright © 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson, 2005-2017 Don Armstrong, and many other contributors.