From owner-freebsd-security@freebsd.org Thu May 21 07:43:21 2020 Return-Path: Delivered-To: freebsd-security@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id E103932C469 for ; Thu, 21 May 2020 07:43:21 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from hz.grosbein.net (hz.grosbein.net [IPv6:2a01:4f8:c2c:26d8::2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "hz.grosbein.net", Issuer "hz.grosbein.net" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 49SM6w3X3Lz4XgM for ; Thu, 21 May 2020 07:43:20 +0000 (UTC) (envelope-from eugen@grosbein.net) Received: from eg.sd.rdtc.ru (eg.sd.rdtc.ru [IPv6:2a03:3100:c:13:0:0:0:5]) by hz.grosbein.net (8.15.2/8.15.2) with ESMTPS id 04L7h1sL008977 (version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 21 May 2020 07:43:02 GMT (envelope-from eugen@grosbein.net) X-Envelope-From: eugen@grosbein.net X-Envelope-To: ihor@antonovs.family Received: from [10.58.0.10] (dadv@dadvw [10.58.0.10]) by eg.sd.rdtc.ru (8.15.2/8.15.2) with ESMTPS id 04L7gxrQ007784 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NOT); Thu, 21 May 2020 14:42:59 +0700 (+07) (envelope-from eugen@grosbein.net) Subject: Re: Malicious root user sandboxing To: ihor@antonovs.family, freebsd-security@freebsd.org References: <1641188.rRC0nNcZtX@amos> <442284bc-e137-f5de-aee6-1d5c69e7d3b8@grosbein.net> <26311043.RtLttYiU3N@amos> From: Eugene Grosbein Message-ID: <6526a9b1-0913-20db-40a7-443623934e06@grosbein.net> Date: Thu, 21 May 2020 14:42:54 +0700 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <26311043.RtLttYiU3N@amos> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=0.3 required=5.0 tests=BAYES_00,LOCAL_FROM, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Report: * -2.3 BAYES_00 BODY: Bayes spam probability is 0 to 1% * [score: 0.0000] * 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record * -0.0 SPF_PASS SPF: sender matches SPF record * 2.6 LOCAL_FROM From my domains X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on hz.grosbein.net X-Rspamd-Queue-Id: 49SM6w3X3Lz4XgM X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=permerror (mx1.freebsd.org: domain of eugen@grosbein.net uses mechanism not recognized by this client) smtp.mailfrom=eugen@grosbein.net X-Spamd-Result: default: False [-0.07 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.31)[-0.305]; FROM_HAS_DN(0.00)[]; NEURAL_SPAM_SHORT(0.04)[0.043]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; DMARC_NA(0.00)[grosbein.net]; RCVD_COUNT_THREE(0.00)[3]; TO_MATCH_ENVRCPT_SOME(0.00)[]; R_SPF_PERMFAIL(0.00)[empty SPF record]; RCPT_COUNT_TWO(0.00)[2]; NEURAL_SPAM_LONG(0.29)[0.289]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:24940, ipnet:2a01:4f8::/29, country:DE]; RCVD_TLS_ALL(0.00)[]; MID_RHS_MATCH_FROM(0.00)[] X-BeenThere: freebsd-security@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: "Security issues \[members-only posting\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 May 2020 07:43:21 -0000 21.05.2020 12:16, Ihor Antonov wrote: > Jails have a lot of drawbacks to. [skip] > I tried jails and was left disappointed. Just use sysutils/ezjail from ports that hides all the hassle and does it all for you, so you need to perform installworld for the host system only. >> Also, shared PAM does not mean duplication of system user database, >> take a look at: man -k pam_|fgrep '(8)' > > The idea was to have a lightweight solution with minimum moving parts. Bringing machinery > like LDAP into this defeats the purpose of the exercise. If you don't like LDAP, use FreeRADIUS and pam_radius. Combined with ezjail, it is most lightweight solution you may currently obtain without writing additional kernel level code.