From nobody Thu Feb 01 00:31:58 2024 X-Original-To: freebsd-current@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 4TQKbj0nX3z58d5B for ; Thu, 1 Feb 2024 00:32:01 +0000 (UTC) (envelope-from gshapiro@freebsd.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (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 4TQKbj0F4dz4L7p for ; Thu, 1 Feb 2024 00:32:01 +0000 (UTC) (envelope-from gshapiro@freebsd.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1706747521; 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=pj5RVe6++r7OvrAD+vuKckOq+JJ/Ji8dKGW3LDGgBEc=; b=uvRAG385UQZLGtunDiv/VzWju+IB0rGLJQ4eniPXV8IKYavqXvcBcCQzod/l8FEBOhSi/t 5f+ACqNrL3FodON3fWMPOuKrjipO8aeNxR2Ugfx/M66AwwEfaAyQRjhAHg0+30Av6Uaiqy dkywKqFhvV61UN2FGOAf0vtZqgA7K5zSCQG8xS7M3vnW0xIsDSIn3PbB/0GOlSbEEgD+mf j7JLNt9w20JfCocvxwO0DUqodZd1gz2BJuFS1B/DbxWNQ1ite7IazElNHkayIQlo3OzdwS M18bTpnEAxr0lGEsKdkAal38FinEwO79E1sDCHH36bAwRK4L33kqQzI2nOaMBQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1706747521; 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=pj5RVe6++r7OvrAD+vuKckOq+JJ/Ji8dKGW3LDGgBEc=; b=V4rGVplFebhK3vbIsRwuva/fFUtnjB1Im6RttsgXmQZsg3fkeqHZAL+4ZBG7lEzxhfTJdn 9tLauIiNXVKbCoUgID1iuMnNKTCqQ+ndjuLvEtznx/w9R1TefrCNHJNvl8DgmnNE4YtQ+B 0IbeWG9LCv49cyOatQe4EYopG87uKjY4yogY6sOHrj9J6KvEH67fMkIz0IhI7fvZKhLpiR /qYbR9j7RPD+ij+6yVpG2GJKjxe5wqmzGlkbutwaumzo2t2+8LcrN9MSNpY1Utuo0r/rKB 8U3QOauUPNS8wwMx5vvaDOCebEd8/edpKrRLvJxbE9sM2NJxc8lnsV+QnqhmUg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1706747521; a=rsa-sha256; cv=none; b=JCoNcr9dgXiNQUfLwIvhixyuDblCmxnevv1v2dt7GELlYh9GDqxf4b+lpXyOQWgFryV/3G D5bfvTlzZO5VG0hYndQvJj/w6yNgnAYmF+gwqfDv7oD+dPTtI3rJwHNcL86BSfZ2xxoCSU XsOY4mLwpf+OIsn/S4RbsT9aETaLWCqTImNbmuiXWz1uRrn5vEf2NUFYuXL35ZkiWvTD2+ Raes4apEAq3HdWVsZcM6jyeGZP+exYBm7i8cD8QupLK5eflg/McT54ZjkMlnHv22XH0rsw QtCPpK6IIny55phGzcxVqF6u/oM93rRfSebF8o1EyVsnfto444/dWz1oJZ7o8w== Received: from thornystick.local (76-14-135-169.rk.wavecable.com [76.14.135.169]) (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 4TQKbh4KQ8z16xs for ; Thu, 1 Feb 2024 00:32:00 +0000 (UTC) (envelope-from gshapiro@freebsd.org) Date: Wed, 31 Jan 2024 16:31:58 -0800 From: Gregory Shapiro To: freebsd-current@freebsd.org Subject: sendmail 8.18.1 imported and merged Message-ID: <43fequx3alugcau6poki5igxkgiicvx2txrc2mq34iftum6x5r@4b4eouf776wh> List-Id: Discussions about the use of FreeBSD-current List-Archive: https://lists.freebsd.org/archives/freebsd-current List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-current@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline As noted in UPDATING: 20240201: 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.