From: "Herbert J. Skuhra" <herbert@gojira.at>
To: Robert Pluim <rpluim@gmail.com>
Cc: help-gnu-emacs@gnu.org
Subject: Re: Network Security Manager warns safe renegotiation is not supported
Date: Thu, 5 Sep 2019 12:02:58 +0200 [thread overview]
Message-ID: <20190905100258.GB12767@mail.bsd4all.net> (raw)
In-Reply-To: <m2d0gfm6am.fsf@gmail.com>
On Thu, Sep 05, 2019 at 11:38:41AM +0200, Robert Pluim wrote:
> >>>>> On Thu, 5 Sep 2019 09:53:08 +0200, "Herbert J. Skuhra" <herbert@gojira.at> said:
>
> Herbert> On Thu, Sep 05, 2019 at 08:51:23AM +0200, Robert Pluim wrote:
> >> >>>>> On Sun, 01 Sep 2019 12:37:10 -0400, Amin Bandali <bandali@gnu.org> said:
> Amin> I’m no security expert, but I don’t think that’s a good idea. Setting
> Amin> `gnutls-algorithm-priority' to that value basically tells GnuTLS to skip
> Amin> TLS1.3 altogether, which is the latest version of the TLS protocol.
> >>
> Amin> The issue seems to be that nsm.el checks for renegotiation_info[1] for
> Amin> TLS1.3 connections as well; but if I understand correctly, renegotiation
> 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 renegotiation-info-ext
> Amin> for TlS1.3 connections. Please don’t take my word for this as, again,
> Amin> I’m no security/GnuTLS expert. Hopefully others with more knowledge can
> Amin> chime in to clarify.
> >>
> >> Correct. Fixed in emacs-master.
>
> Herbert> Hi,
>
> Herbert> I am still getting:
>
> Herbert> Certificate information
> Herbert> Issued by: Let's Encrypt Authority X3
> Herbert> Issued to: CN=elpa.gnu.org
> Herbert> Hostname: elpa.gnu.org
> Herbert> Public key: RSA, signature: RSA-SHA256
> Herbert> Session: TLS1.3, key: ECDHE-RSA, cipher: AES-256-GCM, mac:
> Herbert> AEAD
> Herbert> Security level: Medium
> Herbert> Valid: From 2019-08-07 to 2019-11-05
>
> Herbert> The TLS connection to elpa.gnu.org:443 is insecure
> Herbert> for the following reason:
>
> Herbert> * safe renegotiation is not supported, connection not protected from
> Herbert> impersonators
>
> When did you rebuild emacs? 95becaaf3b went in last night.
I just did another full build (git clean -xfd, ./autogen.sh, ./configure,
etc.). Same result.
% git status
On branch master
Your branch is up to date with 'origin/master'.
% git log -1
commit 365dad197bac5deec9244fd9c189d23c46c99b31 (HEAD -> master,
origin/master, origin/HEAD)
--
Herbert
next prev parent reply other threads:[~2019-09-05 10:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-31 23:23 Network Security Manager warns safe renegotiation is not supported Yuji Nakao
2019-09-01 15:38 ` Jude DaShiell
2019-09-01 16:37 ` Amin Bandali
2019-09-05 6:51 ` Robert Pluim
2019-09-05 7:53 ` Herbert J. Skuhra
2019-09-05 9:38 ` Robert Pluim
2019-09-05 10:02 ` Herbert J. Skuhra [this message]
2019-09-05 11:22 ` Robert Pluim
2019-09-05 11:51 ` Robert Pluim
[not found] ` <mailman.418.1567684317.2075.help-gnu-emacs@gnu.org>
2019-09-05 12:51 ` Lars Magne Ingebrigtsen
2019-09-05 13:44 ` Robert Pluim
[not found] ` <mailman.423.1567691091.2075.help-gnu-emacs@gnu.org>
2019-09-05 13:51 ` Lars Magne Ingebrigtsen
2019-09-05 14:02 ` Robert Pluim
2019-09-05 19:09 ` Herbert J. Skuhra
2019-09-05 12:03 ` Herbert J. Skuhra
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