From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Andreas Schwab Newsgroups: gmane.emacs.bugs Subject: bug#51733: 27.1; Detect impossible email addresses better Date: Wed, 19 Jan 2022 15:39:07 +0100 Message-ID: <87bl077ptg.fsf@igel.home> References: <87czn8etuz.7.fsf@jidanni.org> <83zgnuuucu.fsf@gnu.org> <83r196uqni.fsf@gnu.org> <87sftm3ye5.fsf@gnus.org> <87iluh4ety.fsf@gnus.org> <87ee55474p.fsf@gnus.org> <87a6ft46mr.fsf@gnus.org> <874k6146ay.fsf@gnus.org> <87zgnt2qz9.fsf@gnus.org> <87v8yh2ot4.fsf@gnus.org> <87r1952omd.fsf@gnus.org> <831r14vq70.fsf@gnu.org> <8735lkdqll.fsf@gnus.org> <834k60t03u.fsf@gnu.org> <87h79zdgxe.fsf@gnus.org> <87o8477spw.fsf@igel.home> <87r193akvf.fsf@gnus.org> <87k0ev7rb6.fsf@igel.home> <87ilufakb1.fsf@gnus.org> <87fspj7qzh.fsf@igel.home> <875yqfaj71.fsf@gnus.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="22489"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.91 (gnu/linux) Cc: 51733@debbugs.gnu.org To: Lars Ingebrigtsen Original-X-From: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Wed Jan 19 15:54:58 2022 Return-path: Envelope-to: geb-bug-gnu-emacs@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 1nACMT-0005cQ-Ls for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 19 Jan 2022 15:54:57 +0100 Original-Received: from localhost ([::1]:56192 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nACMS-0007W0-C5 for geb-bug-gnu-emacs@m.gmane-mx.org; Wed, 19 Jan 2022 09:54:56 -0500 Original-Received: from eggs.gnu.org ([209.51.188.92]:51554) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nAC8C-000149-TX for bug-gnu-emacs@gnu.org; Wed, 19 Jan 2022 09:40:14 -0500 Original-Received: from debbugs.gnu.org ([209.51.188.43]:60511) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nAC82-0001El-U2 for bug-gnu-emacs@gnu.org; Wed, 19 Jan 2022 09:40:10 -0500 Original-Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1nAC82-00048S-KX; Wed, 19 Jan 2022 09:40:02 -0500 X-Loop: help-debbugs@gnu.org Resent-From: Andreas Schwab Original-Sender: "Debbugs-submit" Resent-CC: bug-gnu-emacs@gnu.org, bugs@gnus.org Resent-Date: Wed, 19 Jan 2022 14:40:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 51733 X-GNU-PR-Package: emacs,gnus Original-Received: via spool by 51733-submit@debbugs.gnu.org id=B51733.164260315215817 (code B ref 51733); Wed, 19 Jan 2022 14:40:02 +0000 Original-Received: (at 51733) by debbugs.gnu.org; 19 Jan 2022 14:39:12 +0000 Original-Received: from localhost ([127.0.0.1]:53413 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nAC7D-000473-W4 for submit@debbugs.gnu.org; Wed, 19 Jan 2022 09:39:12 -0500 Original-Received: from mail-out.m-online.net ([212.18.0.10]:39909) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1nAC7C-00046s-DQ for 51733@debbugs.gnu.org; Wed, 19 Jan 2022 09:39:11 -0500 Original-Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4Jf7Z50cJ2z1sDRF; Wed, 19 Jan 2022 15:39:08 +0100 (CET) Original-Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4Jf7Z45HJvz1qqkB; Wed, 19 Jan 2022 15:39:08 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Original-Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id ID4vplbSDSm6; Wed, 19 Jan 2022 15:39:08 +0100 (CET) X-Auth-Info: l8+3s8/vWreBi2TC/amEzRNl+PqhHP+Qh9P26Zzpjw7Ls1M5CphfD+AtNTWhM+6a Original-Received: from igel.home (ppp-46-244-165-91.dynamic.mnet-online.de [46.244.165.91]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Wed, 19 Jan 2022 15:39:08 +0100 (CET) Original-Received: by igel.home (Postfix, from userid 1000) id 7F4BD2C3737; Wed, 19 Jan 2022 15:39:07 +0100 (CET) X-Yow: Uh-oh!! I'm having TOO MUCH FUN!! In-Reply-To: <875yqfaj71.fsf@gnus.org> (Lars Ingebrigtsen's message of "Wed, 19 Jan 2022 15:33:54 +0100") X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-BeenThere: bug-gnu-emacs@gnu.org List-Id: "Bug reports for GNU Emacs, the Swiss army knife of text editors" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: bug-gnu-emacs-bounces+geb-bug-gnu-emacs=m.gmane-mx.org@gnu.org Original-Sender: "bug-gnu-emacs" Xref: news.gmane.io gmane.emacs.bugs:224603 Archived-At: On Jan 19 2022, Lars Ingebrigtsen wrote: > Andreas Schwab writes: > >> On Jan 19 2022, Lars Ingebrigtsen wrote: >> >>> Consider somebody sending you an email containing @", characters in the >>> name part, and then you decode the address, and then run the parsing >>> function. The attacker would then have a wide attack surface to trick >>> the checker into checking the wrong parts of the address. >> >> Isn't that the whole point of textsec? > > It's perfectly valid to have a > > From: "larsi@example.com" > > address. It's unambigious, and the responses will go to > larsi@other.com. What's your point? -- Andreas Schwab, schwab@linux-m68k.org GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510 2552 DF73 E780 A9DA AEC1 "And now for something completely different."