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Message-ID: <4E268A59.5030408@redhat.com>
Date: Wed, 20 Jul 2011 13:27:13 +0530
From: Huzaifa Sidhpurwala <huzaifas@...hat.com>
To: oss-security@...ts.openwall.com
Subject: Re: CVE request: kernel: ipv6: make fragment identifications
less predictable
On 07/20/2011 12:42 PM, Eugene Teo wrote:
> IPv6 fragment identification generation is way beyond what we use for
> IPv4 : It uses a single generator. Its not scalable and allows DoS attacks.
>
> Now inetpeer is IPv6 aware, we can use it to provide a more secure and
> scalable frag ident generator (per destination, instead of system wide)
>
> This patch :
> 1) defines a new secure_ipv6_id() helper
> 2) extends inet_getid() to provide 32bit results
> 3) extends ipv6_select_ident() with a new dest parameter
>
> http://thread.gmane.org/gmane.linux.network/201773/focus=201776
> https://bugzilla.redhat.com/show_bug.cgi?id=723429
>
> Thanks, Eugene
Please use CVE-2011-2699
--
Huzaifa Sidhpurwala / Red Hat Security Response Team
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