netdev - Re: Fwd: RFC 6980 on Security Implications of IPv6 Fragmentation with IPv6 Neighbor Discovery

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:	Sat, 31 Aug 2013 02:22:51 -0300
From:	Fernando Gont <fernando@...t.com.ar>
To:	Loganaden Velvindron <loganaden@...il.com>,
	netdev <netdev@...r.kernel.org>
Subject: Re: Fwd: RFC 6980 on Security Implications of IPv6 Fragmentation
 with IPv6 Neighbor Discovery

On 08/15/2013 07:25 AM, Hannes Frederic Sowa wrote:
> 
>> 3) What will/could break with this diff in a production environment ?
> 
> RA messages could get fragmented if a speaker puts lots of options in it. I
> hope all RA speakers already spread the options over multiple RAs, but I don't
> know. In case the RA is fragmented it will now be dropped silently.

My understanding is that some implementations were already dropping
fragmented RAs... so you better avoid fragmentation. Put another way:
you're already in trouble if you rely on fragmented ND messages.

Cheers,
-- 
Fernando Gont
e-mail: fernando@...t.com.ar || fgont@...networks.com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1



--
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