cvs commit: src/sys/netinet6 route6.c

[Kevin Oberman]

> From: "George V. Neville-Neil" <gnn at FreeBSD.org>
> Date: Mon, 23 Apr 2007 09:32:04 +0000 (UTC)
> Sender: owner-cvs-all at freebsd.org
> 
> gnn         2007-04-23 09:32:04 UTC
> 
>   FreeBSD src repository
> 
>   Modified files:
>     sys/netinet6         route6.c 
>   Log:
>   Turn off route header processing for now due to issues pointed out
>   by Philippe Biondi and Arnaud Ebalard.  This is a temporary fix
>   until more discussion can be had on the exact risks involved in
>   allowing source routing in IPv6
>   
>   Submitted by:   itojun
>   Reviewed by:    jinmei
>   MFC after:      1 day
>   
>   Revision  Changes    Path
>   1.13      +7 -0      src/sys/netinet6/route6.c

George,

Thanks! I was just typing up a request for this or a sysctl to control
the processing of RH0. And thanks for NOT breaking RH2 while you were at
it. (That has happened elsewhere.)

I am hoping for a sysctl to manage this with the default set disable RH0
processing. I have reviewed the Biondi/Ebalard report and the risks look
very real to me. It looks serious enough that it should go into
RELENG_6_2, too. 

As an engineer for a network that routes IPv6 universally and the user
of a FreeBSD system that actively employs IPv6 in normal and essential
operations, this looks to have the potential for a spectacular
DOS. (Note that this message started out over an IPv6 path.)

Thanks again!
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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