IETF Logo Mail Archive

Re: Dealing with the NS RRSet [Re: Why *can* cached DNS replies be overwritten?]

Tony Finch <dot@dotat.at> Tue, 12 August 2008 13:45 UTC

Return-Path: <owner-namedroppers@ops.ietf.org>
X-Original-To: ietfarch-dnsext-archive@core3.amsl.com
Delivered-To: ietfarch-dnsext-archive@core3.amsl.com
Received: from localhost (localhost [127.0.0.1]) by core3.amsl.com (Postfix) with ESMTP id BE2EA3A6ACE; Tue, 12 Aug 2008 06:45:40 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -3.563
X-Spam-Level:
X-Spam-Status: No, score=-3.563 tagged_above=-999 required=5 tests=[AWL=-0.264, BAYES_00=-2.599, FH_RELAY_NODNS=1.451, HELO_MISMATCH_UK=1.749, RCVD_IN_DNSWL_MED=-4, RDNS_NONE=0.1]
Received: from mail.ietf.org ([64.170.98.32]) by localhost (core3.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id zWNFFV4vd2Ym; Tue, 12 Aug 2008 06:45:39 -0700 (PDT)
Received: from psg.com (psg.com [IPv6:2001:418:1::62]) by core3.amsl.com (Postfix) with ESMTP id ACB283A68F5; Tue, 12 Aug 2008 06:45:38 -0700 (PDT)
Received: from majordom by psg.com with local (Exim 4.69 (FreeBSD)) (envelope-from <owner-namedroppers@ops.ietf.org>) id 1KSu53-0000HB-Lw for namedroppers-data@psg.com; Tue, 12 Aug 2008 13:38:33 +0000
Received: from [131.111.8.133] (helo=ppsw-3.csi.cam.ac.uk) by psg.com with esmtp (Exim 4.69 (FreeBSD)) (envelope-from <fanf2@hermes.cam.ac.uk>) id 1KSu4v-0000Fx-Hj for namedroppers@ops.ietf.org; Tue, 12 Aug 2008 13:38:27 +0000
X-Cam-AntiVirus: no malware found
X-Cam-SpamDetails: not scanned
X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/
Received: from hermes-1.csi.cam.ac.uk ([131.111.8.51]:56015) by ppsw-3.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.153]:25) with esmtpa (EXTERNAL:fanf2) id 1KSu4s-0004qY-BZ (Exim 4.70) (return-path <fanf2@hermes.cam.ac.uk>); Tue, 12 Aug 2008 14:38:22 +0100
Received: from fanf2 (helo=localhost) by hermes-1.csi.cam.ac.uk (hermes.cam.ac.uk) with local-esmtp id 1KSu4s-0004vT-II (Exim 4.67) (return-path <fanf2@hermes.cam.ac.uk>); Tue, 12 Aug 2008 14:38:22 +0100
Date: Tue, 12 Aug 2008 14:38:22 +0100
From: Tony Finch <dot@dotat.at>
X-X-Sender: fanf2@hermes-1.csi.cam.ac.uk
To: Peter Koch <pk@DENIC.DE>
cc: IETF DNSEXT WG <namedroppers@ops.ietf.org>
Subject: Re: Dealing with the NS RRSet [Re: Why *can* cached DNS replies be overwritten?]
In-Reply-To: <20080812120923.GB39395@unknown.office.denic.de>
Message-ID: <alpine.LSU.1.10.0808121435400.19189@hermes-1.csi.cam.ac.uk>
References: <20080811190427.GD9082@cgi.jachomes.com> <B33086268D53A0429A3AA2774C83892C02E6D330@KAEVS1.SIDN.local> <20080812120923.GB39395@unknown.office.denic.de>
User-Agent: Alpine 1.10 (LSU 962 2008-03-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset="US-ASCII"
Sender: owner-namedroppers@ops.ietf.org
Precedence: bulk
List-ID: <namedroppers.ops.ietf.org>

On Tue, 12 Aug 2008, Peter Koch wrote:
>
> Let's see what different flavors the forged responses can have:

Now about

;; QUESTION SECTION:
;345678.example.org.		IN	A

;; ANSWER SECTION:
345678.example.org.	3600	IN	CNAME	www.example.org.
www.example.org.	3600	IN	A	192.0.2.80	; evil

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
SOUTHEAST ICELAND: NORTHEASTERLY 5 TO 7, OCCASIONALLY GALE 8. ROUGH OR VERY
ROUGH. OCCASIONAL RAIN. MODERATE OR GOOD.

--
to unsubscribe send a message to namedroppers-request@ops.ietf.org with
the word 'unsubscribe' in a single line as the message text body.
archive: <http://ops.ietf.org/lists/namedroppers/>

v2.23.0 | Report a Bug | By Email