From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Stefan Monnier Newsgroups: gmane.emacs.devel Subject: Re: Unicode confusables and reordering characters considered harmful Date: Tue, 02 Nov 2021 15:49:00 -0400 Message-ID: References: <875ytag0hb.fsf@yahoo.com> <87zgqmd5np.fsf@mat.ucm.es> <83wnlqk3rn.fsf@gnu.org> <72dd5c2a-42c7-b12e-05ed-e93adbd89727@gmail.com> <83ilxajyhw.fsf@gnu.org> <83fssejxf8.fsf@gnu.org> <835ytajsv2.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="17046"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) Cc: Eli Zaretskii , cpitclaudel@gmail.com, emacs-devel@gnu.org To: Stefan Kangas Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Tue Nov 02 20:50:05 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mhznG-00046i-Qv for ged-emacs-devel@m.gmane-mx.org; Tue, 02 Nov 2021 20:50:03 +0100 Original-Received: from localhost ([::1]:45212 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mhznF-0007iS-Fx for ged-emacs-devel@m.gmane-mx.org; Tue, 02 Nov 2021 15:50:01 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:32978) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mhzmM-0005tL-Jc for emacs-devel@gnu.org; Tue, 02 Nov 2021 15:49:06 -0400 Original-Received: from mailscanner.iro.umontreal.ca ([132.204.25.50]:7128) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mhzmK-0007ti-Gt; Tue, 02 Nov 2021 15:49:06 -0400 Original-Received: from pmg3.iro.umontreal.ca (localhost [127.0.0.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 1981E44102A; Tue, 2 Nov 2021 15:49:03 -0400 (EDT) Original-Received: from mail01.iro.umontreal.ca (unknown [172.31.2.1]) by pmg3.iro.umontreal.ca (Proxmox) with ESMTP id 9F5C6440F89; Tue, 2 Nov 2021 15:49:01 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=iro.umontreal.ca; s=mail; t=1635882541; bh=5DiK2qFLtg+N84Pl+GDvS8UIykcLetG9Ve1qYSGa2/c=; h=From:To:Cc:Subject:References:Date:In-Reply-To:From; b=iyyHUmOBaEc6b7grY3aWcNyx+AQbZkVaxHLiWGfnG4W6RoLfc4qDALQWGNHK8Wckc NTTJbmFjLAYleepgjunMSURjVxd4wQZ9ui817J8Puu4pg8tfJ2sOSjY3s3mLNErvtG tz5wPUzUY+NHdvZfjWa1tp9d7DFnSpXRUEQ4JpnpNEEn6jpqao/bKKwpa6g7knzBkO 9QedLMfbqjkzHoD5YdIlwDBcsZQjZELQj2lBU12gBT/n4Izv3e+NQyXzjxapAxkOsL GTcQUmN0jUrOvzgVxtg32grkY9gL7768xaHPVbcyG6k8+/yLIM5u/RO0fhfmHnQeS9 no4QBOG09Bm9g== Original-Received: from alfajor (lechon.iro.umontreal.ca [132.204.27.242]) by mail01.iro.umontreal.ca (Postfix) with ESMTPSA id 85E5612064C; Tue, 2 Nov 2021 15:49:01 -0400 (EDT) In-Reply-To: (Stefan Kangas's message of "Tue, 2 Nov 2021 12:26:29 -0700") Received-SPF: pass client-ip=132.204.25.50; envelope-from=monnier@iro.umontreal.ca; helo=mailscanner.iro.umontreal.ca X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:278528 Archived-At: > Could we add some additional visual indication or warning for such > characters, in the light of this discussion? I think there is a clear > risk that users will not step the cursor through some code they copied > from a website, or a patch with tens or hundreds of lines. This means > that they might miss the indication that we have. That's only one very specific attack vector. There are many more. I don't think it makes much sense to try and fix this one without trying to fix the others. Stefan