From: David Bremner Date: Sun, 25 Jan 2015 17:51:43 +0000 (+0100) Subject: Re: privacy problem: text/html parts pull in network resources X-Git-Url: http://git.tremily.us/?a=commitdiff_plain;h=d34d2726d6a02f284ef11ea3a791d59d8f57814e;p=notmuch-archives.git Re: privacy problem: text/html parts pull in network resources --- diff --git a/a5/7db33997b85d18110169a3ec848193e12daf4d b/a5/7db33997b85d18110169a3ec848193e12daf4d new file mode 100644 index 000000000..1d10417d7 --- /dev/null +++ b/a5/7db33997b85d18110169a3ec848193e12daf4d @@ -0,0 +1,71 @@ +Return-Path: +X-Original-To: notmuch@notmuchmail.org +Delivered-To: notmuch@notmuchmail.org +Received: from localhost (localhost [127.0.0.1]) + by olra.theworths.org (Postfix) with ESMTP id 6DE49431FB6 + for ; Sun, 25 Jan 2015 09:52:48 -0800 (PST) +X-Virus-Scanned: Debian amavisd-new at olra.theworths.org +X-Spam-Flag: NO +X-Spam-Score: 2.438 +X-Spam-Level: ** +X-Spam-Status: No, score=2.438 tagged_above=-999 required=5 + tests=[DNS_FROM_AHBL_RHSBL=2.438] autolearn=disabled +Received: from olra.theworths.org ([127.0.0.1]) + by localhost (olra.theworths.org [127.0.0.1]) (amavisd-new, port 10024) + with ESMTP id CNnVbwrLsO0Q for ; + Sun, 25 Jan 2015 09:52:45 -0800 (PST) +Received: from mx.xen14.node3324.gplhost.com (gitolite.debian.net + [87.98.215.224]) + (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) + (No client certificate requested) + by olra.theworths.org (Postfix) with ESMTPS id C1C34431FAF + for ; Sun, 25 Jan 2015 09:52:45 -0800 (PST) +Received: from remotemail by mx.xen14.node3324.gplhost.com with local (Exim + 4.80) (envelope-from ) + id 1YFRLo-0003GT-Cd; Sun, 25 Jan 2015 17:51:56 +0000 +Received: (nullmailer pid 2498 invoked by uid 1000); Sun, 25 Jan 2015 + 17:51:43 -0000 +From: David Bremner +To: Daniel Kahn Gillmor , notmuch mailing list + +Subject: Re: privacy problem: text/html parts pull in network resources +In-Reply-To: <87ppa7q25w.fsf@alice.fifthhorseman.net> +References: <87ppa7q25w.fsf@alice.fifthhorseman.net> +User-Agent: Notmuch/0.19+48~gb74ed1c (http://notmuchmail.org) Emacs/24.4.1 + (x86_64-pc-linux-gnu) +Date: Sun, 25 Jan 2015 18:51:43 +0100 +Message-ID: <87fvay3g0g.fsf@maritornes.cs.unb.ca> +MIME-Version: 1.0 +Content-Type: text/plain +X-BeenThere: notmuch@notmuchmail.org +X-Mailman-Version: 2.1.13 +Precedence: list +List-Id: "Use and development of the notmuch mail system." + +List-Unsubscribe: , + +List-Archive: +List-Post: +List-Help: +List-Subscribe: , + +X-List-Received-Date: Sun, 25 Jan 2015 17:52:48 -0000 + +Daniel Kahn Gillmor writes: + +> If i send a message with a text/html part (either it's only text/html, +> or all parts are rendered, or it's multipart/alternative with only a +> text/html subpart) and that HTML has src="http://example.org/test.png"/> in it, then notmuch will make a +> network request for that image. +> +> This is a privacy disaster, because it enables an e-mail sender to use +> "web bugs" to tell when a given notmuch user has opened their e-mail. + +I've just pushed Austin's shr related series to master, so this problem +should be fixed as of commit b74ed1c. One tradeoff that we should at +least remark in NEWS, if not actually fix, is that I think there is now +no way to view such images in notmuch. I don't know offhand what other +html renderers will do. + +d