From mboxrd@z Thu Jan 1 00:00:00 1970 From: Hannes Frederic Sowa Subject: Re: [PATCH net-next 4/8] net: ipv6: mld: implement RFC3810 MLDv2 mode only Date: Tue, 3 Sep 2013 20:12:55 +0200 Message-ID: <20130903181255.GF21729@order.stressinduktion.org> References: <1378195178-21002-1-git-send-email-dborkman@redhat.com> <1378195178-21002-5-git-send-email-dborkman@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Cc: davem@davemloft.net, netdev@vger.kernel.org To: Daniel Borkmann Return-path: Received: from order.stressinduktion.org ([87.106.68.36]:35149 "EHLO order.stressinduktion.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753889Ab3ICSM5 (ORCPT ); Tue, 3 Sep 2013 14:12:57 -0400 Content-Disposition: inline In-Reply-To: <1378195178-21002-5-git-send-email-dborkman@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, Sep 03, 2013 at 09:59:34AM +0200, Daniel Borkmann wrote: > RFC3810, 10. Security Considerations says under subsection 10.1. > Query Message: > > A forged Version 1 Query message will put MLDv2 listeners on that > link in MLDv1 Host Compatibility Mode. This scenario can be avoided > by providing MLDv2 hosts with a configuration option to ignore > Version 1 messages completely. > > Hence, implement a MLDv2-only mode that will ignore MLDv1 traffic: > > echo 2 > /proc/sys/net/ipv6/conf/ethX/force_mld_version > > Signed-off-by: Daniel Borkmann > Cc: Hannes Frederic Sowa Acked-by: Hannes Frederic Sowa