From nobody Sun May 11 16:10:35 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 4ZwSWR1r0Rz5w537 for ; Sun, 11 May 2025 16:15:15 +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 4ZwSWP403Rz3dWW for ; Sun, 11 May 2025 16:15:13 +0000 (UTC) (envelope-from naddy@mips.inka.de) Authentication-Results: mx1.freebsd.org; dkim=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; dmarc=none Received: from mips.inka.de (naddy@[127.0.0.1]) by mail.inka.de with uucp (rmailwrap 0.5) id 1uE9KS-0091jG-IO; Sun, 11 May 2025 18:15:04 +0200 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 54BGAZKe043764 for ; Sun, 11 May 2025 18:10:35 +0200 (CEST) (envelope-from naddy@lorvorc.mips.inka.de) Received: (from naddy@localhost) by lorvorc.mips.inka.de (8.18.1/8.18.1/Submit) id 54BGAZSI043763 for freebsd-security@freebsd.org; Sun, 11 May 2025 18:10:35 +0200 (CEST) (envelope-from naddy) Date: Sun, 11 May 2025 18:10:35 +0200 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: X-Rspamd-Queue-Id: 4ZwSWP403Rz3dWW X-Spamd-Bar: ++ X-Spamd-Result: default: False [2.15 / 15.00]; NEURAL_SPAM_LONG(1.00)[1.000]; NEURAL_SPAM_SHORT(0.84)[0.838]; NEURAL_SPAM_MEDIUM(0.61)[0.609]; R_SPF_ALLOW(-0.20)[+mx]; MIME_GOOD(-0.10)[text/plain]; ARC_NA(0.00)[]; ASN(0.00)[asn:202113, ipnet:2a04:c9c7::/32, country:DE]; FREEFALL_USER(0.00)[naddy]; MIME_TRACE(0.00)[0:+]; MID_RHS_MATCH_FROMTLD(0.00)[]; MISSING_XM_UA(0.00)[]; R_DKIM_NA(0.00)[]; RCVD_COUNT_THREE(0.00)[3]; RCPT_COUNT_ONE(0.00)[1]; TO_DN_NONE(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; MLMMJ_DEST(0.00)[freebsd-security@freebsd.org]; 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]; FROM_HAS_DN(0.00)[] void: > +1 to this. Just the client. Maybe call it openssh-vuln? > > I can appreciate it being removed in base, in server. But there's > lots of otherwise-working gear around that only uses > ssh-dss or ssh-rsa. We only need the client. ssh-rsa, i.e. RSA keys with a signature algorithm that uses SHA-1, is still supported in the latest OpenSSH, even if disabled by default. -- Christian "naddy" Weisgerber naddy@mips.inka.de