From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: "Herbert J. Skuhra" Newsgroups: gmane.emacs.help Subject: Re: Network Security Manager warns safe renegotiation is not supported Date: Thu, 5 Sep 2019 09:53:08 +0200 Message-ID: <20190905075308.GA12767@mail.bsd4all.net> References: <87zhjoj4w3.fsf@yujinakao.com> <875zmcdlc9.fsf@fencepost.gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="47930"; mail-complaints-to="usenet@blaine.gmane.org" User-Agent: Mutt/1.12.1 (2019-06-15) To: help-gnu-emacs@gnu.org Original-X-From: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Thu Sep 05 09:54:10 2019 Return-path: Envelope-to: geh-help-gnu-emacs@m.gmane.org Original-Received: from lists.gnu.org ([209.51.188.17]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1i5man-000CKy-O7 for geh-help-gnu-emacs@m.gmane.org; Thu, 05 Sep 2019 09:54:09 +0200 Original-Received: from localhost ([::1]:42956 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i5mam-0005Sb-An for geh-help-gnu-emacs@m.gmane.org; Thu, 05 Sep 2019 03:54:08 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:53717) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1i5ma2-0005SQ-CV for help-gnu-emacs@gnu.org; Thu, 05 Sep 2019 03:53:23 -0400 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1i5ma1-00007L-AW for help-gnu-emacs@gnu.org; Thu, 05 Sep 2019 03:53:22 -0400 Original-Received: from mail.bsd4all.net ([144.76.30.122]:25640) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1i5ma0-0008Q0-Rk for help-gnu-emacs@gnu.org; Thu, 05 Sep 2019 03:53:21 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=gojira.at; s=mail201809; t=1567669988; bh=LW32n8MfIXDIQcwjF4QfGkSb140O26+pxWVsj7DFnwc=; h=Date:From:To:Subject:Message-ID:MIME-Version:Content-Type; b=aYdCqd6JfMMCfXvjribpGdSiPXSTZI4trgy/pjrATkI9Iz9yT4wTHHnKl1oHQ8HSR 7xjtBlTtVy3EnTOJuHhE8ke4qJfN0o0v0FpQhqkO/zM9o0p+Rm61y1bMv7xUtRMjOF XT2M3g+z4gZtcBHuA+cFAsWSAW2hRCFusObGnLzpz64i/IEXtykvQRldAJZt0AvNDs raiwm+lyhGSy3Kfo5xxpZ7bbHqAVg/7idlswTEIAoUv7GBV7xzWHDkYoq/BevVmmER 8+fjDNRwmKaadOy3zpg3SRMJhRMR0TkI5a9nNbCq5t02m0befDNBZG9V1ucMzar3lw BT2a8T0Sy/OcA== Content-Disposition: inline In-Reply-To: X-detected-operating-system: by eggs.gnu.org: FreeBSD 9.x [fuzzy] X-Received-From: 144.76.30.122 X-BeenThere: help-gnu-emacs@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Users list for the GNU Emacs text editor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-gnu-emacs-bounces+geh-help-gnu-emacs=m.gmane.org@gnu.org Original-Sender: "help-gnu-emacs" Xref: news.gmane.org gmane.emacs.help:121441 Archived-At: On Thu, Sep 05, 2019 at 08:51:23AM +0200, Robert Pluim wrote: > >>>>> On Sun, 01 Sep 2019 12:37:10 -0400, Amin Bandali said: > Amin> I=E2=80=99m no security expert, but I don=E2=80=99t think tha= t=E2=80=99s a good idea. Setting > Amin> `gnutls-algorithm-priority' to that value basically tells Gnu= TLS to skip > Amin> TLS1.3 altogether, which is the latest version of the TLS pro= tocol. >=20 > Amin> The issue seems to be that nsm.el checks for renegotiation_in= fo[1] for > Amin> TLS1.3 connections as well; but if I understand correctly, re= negotiation > Amin> was removed from TLS1.3, according to [2] and [3]. I *think*= the proper > Amin> way to fix this would be have nsm *not* check for renegotiati= on-info-ext > Amin> for TlS1.3 connections. Please don=E2=80=99t take my word fo= r this as, again, > Amin> I=E2=80=99m no security/GnuTLS expert. Hopefully others with= more knowledge can > Amin> chime in to clarify. >=20 > Correct. Fixed in emacs-master. Hi, I am still getting: Certificate information Issued by: Let's Encrypt Authority X3 Issued to: CN=3Delpa.gnu.org Hostname: elpa.gnu.org Public key: RSA, signature: RSA-SHA256 Session: TLS1.3, key: ECDHE-RSA, cipher: AES-256-GCM, mac: AEAD Security level: Medium Valid: From 2019-08-07 to 2019-11-05 The TLS connection to elpa.gnu.org:443 is insecure for the following reason: * safe renegotiation is not supported, connection not protected from impersonators --=20 Herbert