netdev - Re: [PATCH net] ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Wed, 22 Jan 2014 02:08:42 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net] ipv6: protect protocols not handling ipv4 from v4 connection/bind attempts

On Tue, Jan 21, 2014 at 04:59:41PM -0800, David Miller wrote:
> From: Hannes Frederic Sowa <hannes@...essinduktion.org>
> Date: Mon, 20 Jan 2014 05:16:39 +0100
> 
> > Some ipv6 protocols cannot handle ipv4 addresses, so we must not allow
> > connecting and binding to them. sendmsg logic does already check msg->name
> > for this but must trust already connected sockets which could be set up
> > for connection to ipv4 address family.
> > 
> > Per-socket flag ipv6only is of no use here, as it is under users control
> > by setsockopt.
> > 
> > Signed-off-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> 
> Applied.  Is the plan to add support to at least ping?

Yes, this is planned but for the meantime we should disable it.

Thanks!

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html