From nobody Wed Mar 19 22:42:00 2025 X-Original-To: freebsd-security@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4ZJ3gv20Yrz5qqRq for ; Wed, 19 Mar 2025 22:45:15 +0000 (UTC) (envelope-from naddy@mips.inka.de) Received: from mail.inka.de (mail.inka.de [IPv6:2a04:c9c7:0:1073:217:a4ff:fe3b:e77c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4ZJ3gt17Y7z3w28 for ; Wed, 19 Mar 2025 22:45:14 +0000 (UTC) (envelope-from naddy@mips.inka.de) Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of naddy@mips.inka.de designates 2a04:c9c7:0:1073:217:a4ff:fe3b:e77c as permitted sender) smtp.mailfrom=naddy@mips.inka.de Received: from mips.inka.de (naddy@[127.0.0.1]) by mail.inka.de with uucp (rmailwrap 0.5) id 1tv29q-00Dbag-3M; Wed, 19 Mar 2025 23:45:06 +0100 Received: from lorvorc.mips.inka.de (localhost [127.0.0.1]) by lorvorc.mips.inka.de (8.18.1/8.18.1) with ESMTP id 52JMg0gL013631 for ; Wed, 19 Mar 2025 23:42:00 +0100 (CET) (envelope-from naddy@lorvorc.mips.inka.de) Received: (from naddy@localhost) by lorvorc.mips.inka.de (8.18.1/8.18.1/Submit) id 52JMg02c013630 for freebsd-security@freebsd.org; Wed, 19 Mar 2025 23:42:00 +0100 (CET) (envelope-from naddy) Date: Wed, 19 Mar 2025 23:42:00 +0100 From: Christian Weisgerber To: freebsd-security@freebsd.org Subject: Re: Heads-up: DSA key support being removed from OpenSSH Message-ID: References: <76933d66-eff5-4d43-a7a6-98a153e71d77@rlwinm.de> List-Id: Security issues List-Archive: https://lists.freebsd.org/archives/freebsd-security List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-security@freebsd.org Sender: owner-freebsd-security@FreeBSD.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <76933d66-eff5-4d43-a7a6-98a153e71d77@rlwinm.de> X-Spamd-Result: default: False [-0.30 / 15.00]; NEURAL_SPAM_LONG(0.98)[0.984]; NEURAL_HAM_SHORT(-0.84)[-0.845]; R_SPF_ALLOW(-0.20)[+mx]; NEURAL_HAM_MEDIUM(-0.14)[-0.141]; MIME_GOOD(-0.10)[text/plain]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; ASN(0.00)[asn:202113, ipnet:2a04:c9c7::/32, country:DE]; MIME_TRACE(0.00)[0:+]; FREEFALL_USER(0.00)[naddy]; MISSING_XM_UA(0.00)[]; MID_RHS_MATCH_FROMTLD(0.00)[]; MLMMJ_DEST(0.00)[freebsd-security@freebsd.org]; RCVD_COUNT_THREE(0.00)[3]; TO_DN_NONE(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_LAST(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[freebsd-security@freebsd.org]; DMARC_NA(0.00)[inka.de]; ARC_NA(0.00)[] X-Rspamd-Queue-Id: 4ZJ3gt17Y7z3w28 X-Spamd-Bar: / Jan Bramkamp: > > This release, and its deactivation of DSA by default at compile-time, > > marks the second step in our timeline to finally deprecate DSA. The > > final step of removing DSA support entirely is planned for the first > > OpenSSH release of 2025. > > As long as it's "only" a compile-time option away for FreeBSD to enable this > flawed cipher I would like to have it compiled in by default so it doesn't If OpenSSH upstream stick to the published schedule, version 9.9 that is now in 13-STABLE/14-STABLE/15-CURRENT will be the _final_ release that even includes the DSA code. That has been announced for a year. There is going to be a new OpenSSH release soonish, to coincide with the as-clockwork OpenBSD release in spring. I see that the DSA code has not yet been removed from OpenBSD-current, but I don't know if that points to a reprieve or is simply an upcoming to-do item. > require installing SSH from ports to connect to some stupid old > router/switch/UPS/whatever over SSH. I feel your pain. Host sw0 sw1 sw2 KexAlgorithms +diffie-hellman-group1-sha1 HostKeyAlgorithms +ssh-dss Ciphers +aes128-cbc # TP-Link JetStream switches drop the connection when offered an ECDSA key PreferredAuthentications keyboard-interactive,password Time to replace those switches, I guess... -- Christian "naddy" Weisgerber naddy@mips.inka.de