Re: The TCP and UDP checksum algorithm may soon need updating

"Salz, Rich" <rsalz@akamai.com> Sun, 07 June 2020 23:52 UTC

Return-Path: <rsalz@akamai.com>
X-Original-To: ietf@ietfa.amsl.com
Delivered-To: ietf@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 499C93A07C5 for <ietf@ietfa.amsl.com>; Sun, 7 Jun 2020 16:52:40 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -2.1
X-Spam-Level:
X-Spam-Status: No, score=-2.1 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Authentication-Results: ietfa.amsl.com (amavisd-new); dkim=pass (2048-bit key) header.d=akamai.com
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JWkKCyv3rOOe for <ietf@ietfa.amsl.com>; Sun, 7 Jun 2020 16:52:39 -0700 (PDT)
Received: from mx0a-00190b01.pphosted.com (mx0a-00190b01.pphosted.com [IPv6:2620:100:9001:583::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 328143A07C3 for <ietf@ietf.org>; Sun, 7 Jun 2020 16:52:38 -0700 (PDT)
Received: from pps.filterd (m0122333.ppops.net [127.0.0.1]) by mx0a-00190b01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 057Nm13u005363; Mon, 8 Jun 2020 00:52:38 +0100
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=akamai.com; h=from : to : cc : subject : date : message-id : references : in-reply-to : content-type : content-id : content-transfer-encoding : mime-version; s=jan2016.eng; bh=D9Y3JCM5R/zizc/WLaqvrLPaOqV6QOhvhGB/fWTpkaw=; b=auce/g02Sj2UN91UpzeFCWuci0EC2foY8Jrs7Ao7po+pqUUu8ylqd4VC5KWf1+sClhm6 efiykaU3H7WGe422dYZuOY+pC91rtbQsKYW16FADlkCZYMma9yiZ9aVw5iClaipW3Uwt 8B05tZHHYdzIsKIH2FtWQMebXP/1ldX/OrWSUaRNJV5cHF++yukyJ5iN3WNj8sUpfoOq hrVnUGR0OUv3SFgiOihFK3GpOlcZfSYhsVV3+gH8bzgkX/ilhNTpxCqsxzqIemMkF8I5 27wHelGtCAxSD6HUkswOlu0j6YrrRzYMfvT66+Ogygs7pLtq7e+eeXuKKuBNxaNcESMs /Q==
Received: from prod-mail-ppoint7 (a72-247-45-33.deploy.static.akamaitechnologies.com [72.247.45.33] (may be forged)) by mx0a-00190b01.pphosted.com with ESMTP id 31g2dc805r-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 08 Jun 2020 00:52:38 +0100
Received: from pps.filterd (prod-mail-ppoint7.akamai.com [127.0.0.1]) by prod-mail-ppoint7.akamai.com (8.16.0.42/8.16.0.42) with SMTP id 057N4hko016395; Sun, 7 Jun 2020 19:52:37 -0400
Received: from email.msg.corp.akamai.com ([172.27.165.117]) by prod-mail-ppoint7.akamai.com with ESMTP id 31g6fxmx9v-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT); Sun, 07 Jun 2020 19:52:37 -0400
Received: from USTX2EX-DAG1MB1.msg.corp.akamai.com (172.27.165.119) by ustx2ex-dag1mb5.msg.corp.akamai.com (172.27.165.123) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 7 Jun 2020 18:52:37 -0500
Received: from USTX2EX-DAG1MB1.msg.corp.akamai.com ([172.27.165.119]) by ustx2ex-dag1mb1.msg.corp.akamai.com ([172.27.165.119]) with mapi id 15.00.1497.006; Sun, 7 Jun 2020 18:52:36 -0500
From: "Salz, Rich" <rsalz@akamai.com>
To: Michael Thomas <mike@mtcc.com>, Joseph Touch <touch@strayalpha.com>
CC: "ietf@ietf.org" <ietf@ietf.org>
Subject: Re: The TCP and UDP checksum algorithm may soon need updating
Thread-Topic: The TCP and UDP checksum algorithm may soon need updating
Thread-Index: AQHWOqQkI5C4JiLph0G4VdrGIZhHUqjJLHSAgAAMCICAABGLAIAAAhKAgAAH2wCAACNLgIAAMX6AgAARtoCAAMu6gIAACAsAgANF1ACAAAh8AIAACMMAgAAbAwCAABH/gIAAAjEA///EIwCAAElVAP//xvSA
Date: Sun, 7 Jun 2020 23:52:36 +0000
Message-ID: <D55AFBFD-0D59-4176-B6BD-D6A1801FEC2C@akamai.com>
References: <28A2725D-00F8-4739-8A73-ED176F8EF561@strayalpha.com> <3AA98081-A70E-4076-8096-79FFAEE8A738@huitema.net> <830b91c4-0bb5-af5b-f7b8-c5edd43dc87e@mtcc.com> <4512C1BF-5722-479B-8506-24018610BEAD@strayalpha.com> <5b4ea5ea-e2d6-1a01-3676-dd2a72dbd2c1@mtcc.com> <2C425F1E-2E12-4E47-ACEC-AF4C4A93FA3E@akamai.com> <140429ad-af8b-e03f-a641-1e78b6056fa4@mtcc.com>
In-Reply-To: <140429ad-af8b-e03f-a641-1e78b6056fa4@mtcc.com>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
user-agent: Microsoft-MacOutlook/16.37.20051002
x-ms-exchange-messagesentrepresentingtype: 1
x-ms-exchange-transport-fromentityheader: Hosted
x-originating-ip: [172.19.114.33]
Content-Type: text/plain; charset="utf-8"
Content-ID: <0F51C74FF61E7B4489F37DE218DE92C8@akamai.com>
Content-Transfer-Encoding: base64
MIME-Version: 1.0
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-07_13:2020-06-04, 2020-06-07 signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxlogscore=774 malwarescore=0 spamscore=0 adultscore=0 suspectscore=0 bulkscore=0 phishscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070183
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.216, 18.0.687 definitions=2020-06-07_13:2020-06-04, 2020-06-07 signatures=0
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 cotscore=-2147483648 impostorscore=0 mlxscore=0 malwarescore=0 mlxlogscore=766 adultscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 spamscore=0 clxscore=1015 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070189
Archived-At: <https://mailarchive.ietf.org/arch/msg/ietf/vmYynjnAeUeEpGJ7ihd1opyUidY>
X-BeenThere: ietf@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: IETF-Discussion <ietf.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ietf>, <mailto:ietf-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ietf/>
List-Post: <mailto:ietf@ietf.org>
List-Help: <mailto:ietf-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ietf>, <mailto:ietf-request@ietf.org?subject=subscribe>
X-List-Received-Date: Sun, 07 Jun 2020 23:52:40 -0000

>    Because the TCP headers aren't part of the hmac digest? Am I missing 
    something?

And how does that affect the application data?  What corruption of TCP headers would not end up being noticed at the application layer and therefore TLS?