From nobody Wed Feb 7 07:54:34 2024 X-Original-To: freebsd-stable@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 4TVC7c53Wgz5941H for ; Wed, 7 Feb 2024 07:54:36 +0000 (UTC) (envelope-from gshapiro@freebsd.org) Received: from smtp.freebsd.org (smtp.freebsd.org [IPv6:2610:1c1:1:606c::24b:4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4TVC7c4NB3z4l6X for ; Wed, 7 Feb 2024 07:54:36 +0000 (UTC) (envelope-from gshapiro@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1707292476; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type; bh=f/fwnZ9HbA68h/Y0OXT3zYV7i/NjuQaQFP60BmCRJrA=; b=SYTYyiACUWfvaTmAODNoBduMRXsXI+jn1MljCBKX0JhTHdLNXg5TcfUuAz5mTlzPbIo/at JqUXsky4wdOx9g5HWP/7y1dTIrEV2qpSjym+EeW8y56HZadzE+1isK2XqkWm2AvJB42Ip8 vk5s8NmefPPp9uWCdo2sTP8cbDqOYDG3UmG/tmgefwnvxx7u6lIY8ahfeO4Uhis7mfhvyv nt2EEuzZTG44kuqeun6OthHIL1y0v111N0b0FeGeprvbxwktoQDftR+gSqvowKyxa9Xs8n nOJPJRxxx+hAAKrskcawe2z8s7D2x4qpEMzW5w5/TIXw0WAyerZHe+6514w8jA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1707292476; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type; bh=f/fwnZ9HbA68h/Y0OXT3zYV7i/NjuQaQFP60BmCRJrA=; b=seqIOlxpy7PfB8DYSUCdefDS4Gdkl1dcHi31U/frytZB7HdAMKDraEX5lZ3sa/UfK42Ifn MbQybvaR+jGzYEeW+FQVfJNi9rfjpyXP/NevSVINkzNa0qNiQjshA1CHXEIyiSIb1nTMg7 LB65oIH2V8WBCRP6/J1U3Syh+rtj7cFOl3tKKuyCIL30VTGdgxo83fqVlrppeytGN6k+ed nbFwOxLXufLMCBU0HCM0ahn59jhWhbiXZcACQF+H/6krw2jyhbS16+X6cJ1A3ueBDtNkH0 9vaC8pPhsc8eGdye2xLnFGudG5nelIlBXdvJysXe4Bx1Uz/1YAfrv/mL+8mfPQ== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1707292476; a=rsa-sha256; cv=none; b=QW8eeV4DXbAwB7QJkrTn/U3E5oxQRTBvefXK4T2tUtymIi8DM2J/MMuhzBK5zmNsDZ2D9w 8rM7MtxK3CTtLtOJuRAd4J9IyPy7vMKXla/Jxy2mktfbfyti1fvJEW42lbcG+oSv7qg1Jh mtMLh74N4KS7Efo8fr/4XaiXlt6p5eHcZLJjKtowiZfoRB41KDerxvRpUqqdW6Iqtk4RIa wueA0kXIjOv19XmcWRoTSXJiOE4erfyC+5BQfQNHJ5oX8JslgJb4cv1lnbB4Q0AZmgRe7B FdogWF/WPrTCcXJ0WbWl9oDczOuS4SKCtBWvYiJqI8+YVj0fzCSVLvD393KGxg== Received: from thornystick.gshapiro.net.beta.tailscale.net (sizz-lor.gshapiro.net [104.234.4.21]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: gshapiro) by smtp.freebsd.org (Postfix) with ESMTPSA id 4TVC7c262cz171k for ; Wed, 7 Feb 2024 07:54:36 +0000 (UTC) (envelope-from gshapiro@freebsd.org) Date: Tue, 6 Feb 2024 23:54:34 -0800 From: Gregory Shapiro To: freebsd-stable@freebsd.org Subject: sendmail 8.18.1 MFC'ed to stable/13 and stable/14 Message-ID: List-Id: Production branch of FreeBSD source code List-Archive: https://lists.freebsd.org/archives/freebsd-stable List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-stable@freebsd.org X-BeenThere: freebsd-stable@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline As noted in UPDATING: 20240207: sendmail 8.18.1 has been imported and merged. This version enforces stricter RFC compliance by default, especially with respect to line endings. This may cause issues with receiving messages from non-compliant MTAs; please see the first 8.18.1 release note in contrib/sendmail/RELEASE_NOTES for mitigations. Here is that release note entry: 8.18.1/8.18.1 2024/01/31 sendmail is now stricter in following the RFCs and rejects some invalid input with respect to line endings and pipelining: - Prevent transaction stuffing by ensuring SMTP clients wait for the HELO/EHLO and DATA response before sending further SMTP commands. This can be disabled using the new srv_features option 'F'. Issue reported by Yepeng Pan and Christian Rossow from CISPA Helmholtz Center for Information Security. - Accept only CRLF . CRLF as end of an SMTP message as required by the RFCs, which can disabled by the new srv_features option 'O'. - Do not accept a CR or LF except in the combination CRLF (as required by the RFCs). These checks can be disabled by the new srv_features options 'U' and 'G', respectively. In this case it is suggested to use 'u2' and 'g2' instead so the server replaces offending bare CR or bare LF with a space. It is recommended to only turn these protections off for trusted networks due to the potential for abuse.