Bug 341387

Summary:	KDE 4 Network Management created OpenVPN connections vulnerable to MITM attack
Product:	[Unmaintained] Network Management	Reporter:	Richard Yao <ryao>
Component:	OpenVPN	Assignee:	Lamarque V. Souza <lamarque>
Status:	RESOLVED FIXED
Severity:	grave	CC:	jgrulich, kdebugs
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	unspecified
OS:	All
Latest Commit:	http://commits.kde.org/networkmanagement/918786c28f7657ad8deff084ae44a257a7d471f6	Version Fixed/Implemented In:	0.9.0.12
Sentry Crash Report:

Description Richard Yao 2014-11-29 03:08:45 UTC

KDE's network manager plasmoid does not tell OpenVPN to perform server certificate verification. Consequently, anyone with the preshared key is able to perform a MITM attack by impersonating the server. OpenVPN warns about this at start:

Nov 17 22:40:56 t520 nm-openvpn[29005]: WARNING: No server certificate verification method has been enabled.  See http://openvpn.net/howto.html#mitm for more info.

This has been an issue for years. I initially only filed a bug against plasma-nm was filed under the incorrect assumption that the network manager plasmoid had been retired:

https://bugs.kde.org/show_bug.cgi?id=341070

To my great delight (as I prefer the network manager plasmoid on my laptop), I have since realized that I had been wrong, so I am filing this bug.

Comment 1 Lamarque V. Souza 2014-11-29 10:52:24 UTC

Git commit 918786c28f7657ad8deff084ae44a257a7d471f6 by Lamarque V. Souza.
Committed on 29/11/2014 at 10:50.
Pushed by lvsouza into branch 'nm09'.

OpenVPN: Add option for server certificate verification

FIXED-IN: 0.9.0.12

M  +1    -1    plasma_nm_version.h
M  +1    -0    vpnplugins/openvpn/nm-openvpn-service.h
M  +52   -15   vpnplugins/openvpn/openvpnprop.ui
M  +14   -0    vpnplugins/openvpn/openvpnwidget.cpp

http://commits.kde.org/networkmanagement/918786c28f7657ad8deff084ae44a257a7d471f6

Comment 2 Richard Yao 2014-12-01 10:21:58 UTC

I cited the wrong bug above. The correct link is:

https://bugs.kde.org/show_bug.cgi?id=341069

Thanks once again for the prompt fix.

Comment 3 kdebugs 2016-04-23 19:55:30 UTC

What happened to the commit?  Git shows the files unchanged.  Please Reopen and fix.