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Re: Network Security Manager warns safe renegotiation is not supported

From: Robert Pluim
Subject: Re: Network Security Manager warns safe renegotiation is not supported
Date: Thu, 05 Sep 2019 11:38:41 +0200

>>>>> On Thu, 5 Sep 2019 09:53:08 +0200, "Herbert J. Skuhra" 
>>>>> <> 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 <> 
    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 
    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, 
    Amin> was removed from TLS1.3, according to [2] and [3].  I *think* the 
    Amin> way to fix this would be have nsm *not* check for 
    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 
    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:
    Herbert>   Hostname: 
    Herbert>   Public key:         RSA, signature: RSA-SHA256
    Herbert>   Session:            TLS1.3, key: ECDHE-RSA, cipher: AES-256-GCM, 
    Herbert> AEAD
    Herbert>   Security level:     Medium
    Herbert>   Valid:              From 2019-08-07 to 2019-11-05

    Herbert> The TLS connection to is insecure
    Herbert> for the following reason:

    Herbert> * safe renegotiation is not supported, connection not protected 
    Herbert> impersonators

When did you rebuild emacs? 95becaaf3b went in last night.


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