From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp0 ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms0.migadu.com with LMTPS id uP7HIYZ6dmGECgEAgWs5BA (envelope-from ) for ; Mon, 25 Oct 2021 11:36:06 +0200 Received: from aspmx1.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp0 with LMTPS id +OWVHYZ6dmHQHQAA1q6Kng (envelope-from ) for ; Mon, 25 Oct 2021 09:36:06 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 3247798D5 for ; Mon, 25 Oct 2021 11:36:06 +0200 (CEST) Received: from localhost ([::1]:59176 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mewOj-0004lJ-Aq for larch@yhetil.org; Mon, 25 Oct 2021 05:36:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39802) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mewON-0004jf-15 for guix-devel@gnu.org; Mon, 25 Oct 2021 05:35:43 -0400 Received: from libre.brussels ([144.76.234.112]:54398) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mewOD-00044t-M6 for guix-devel@gnu.org; Mon, 25 Oct 2021 05:35:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=libre.brussels; s=mail; t=1635154530; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7/wV40G2F6Ci6+tV3mqd8HefMkcwlw78qFme/xP8ZmE=; b=n1+0fkh0MQlgcn9e+dVswig3zxvhPKGoZccaLBeCDeG3iXsFQDacLWAmlH1JnFRMGzjJWp g9+h+lDcAVFh8A6ZW6gHNzlXQxqC+SrT5X0nZxtgcZhE7vZqCBm2xLw28lP9OXhtNURT+h p1iTTiii0UY43EcR3aQW+ikMvHghcPw= References: <864k9a2r1m.fsf@gmail.com> <878rynh0yq.fsf@systemreboot.net> <87cznz74l5.fsf@nckx> <864k9ag5k0.fsf@gmail.com> <87a6j272oz.fsf@nckx> <14fcfe6c31dab2128746730df72caba0@libre.brussels> <867de611ya.fsf@gmail.com> <87mtn256it.fsf@nckx> <86r1cdzf74.fsf@gmail.com> <878ryk9tod.fsf@systemreboot.net> <86ilxob3xc.fsf@gmail.com> <87o87e9b3x.fsf@systemreboot.net> From: indieterminacy@libre.brussels To: Arun Isaac Subject: Re: Public guix offload server Date: Mon, 25 Oct 2021 11:27:36 +0200 In-reply-to: <87o87e9b3x.fsf@systemreboot.net> Message-ID: <87v91lv4a6.fsf@qiuy04.i-did-not-set--mail-host-address--so-tickle-me> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Received-SPF: pass client-ip=144.76.234.112; envelope-from=indieterminacy@libre.brussels; helo=libre.brussels X-Spam_score_int: -6 X-Spam_score: -0.7 X-Spam_bar: / X-Spam_report: (-0.7 / 5.0 requ) BAYES_05=-0.5, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: guix-devel@gnu.org Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1635154566; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:list-id:list-help: list-unsubscribe:list-subscribe:list-post:dkim-signature; bh=7/wV40G2F6Ci6+tV3mqd8HefMkcwlw78qFme/xP8ZmE=; b=T5IB1MB+fwkYYQxQVUu4UVdkKLwCInQlzFcOaY1tm8S0hqQRovRlNcomydsM7CF18i/Tt9 uISf+o8ln//2lJNNqPKzw2rMU8vDifpkXr1m4CAhM758GN7OfZQ4UvE+yHILE1wJ02SnjF 8hUP4AQvwoL5fzux8EGRG2UW77sZmg7cAKvvfhKUDS7FYNnNN5DHJcLkBYcqVwNJix720Y vP36PnELd3TDYWp3dW3+CGbDInrEWoT/+NGMeyf6D3gelY+DQc7vNkOs3Ex+PQuMUXpWzt Hxg7rGo4cYoecQhx59mmF7Ev9vIx3AIYe4a5ZHevnfmVZQc6w2BFzKOEd97rFg== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1635154566; a=rsa-sha256; cv=none; b=s16buUPT6am4NlmZ1dQT0Lf1s0zRm+zwtFgyWAbEHIKUV5fCzZ9nzMIHy4Lgo0MgFy4lQU luvJw+LdIfKKk/HOEqFFMqdzb+34pKYqwdmiJ/CXWS3KIyAZTZ/uMsapRX6nA1hayf3Q+1 FgJoSInKY8aRPve7P1y7ZaYKayEg+dP7cArQ1eQ3pGSmvnuuNQ8ulLhfqZFTrGD/0wP7d8 Uaoyx+FYCpVwuYoQPlkxt5pd3wNT0JuCdWHpIgXVgewZwbDVOcgMPvPu6gHsGewWWjqHee H+pgKLvbVZRvEhyq5AX6MiCM591FaSoztPTNc6KEbK7Nps0KoQ099AT2KZm0QA== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=libre.brussels header.s=mail header.b=n1+0fkh0; dmarc=fail reason="SPF not aligned (relaxed)" header.from=libre.brussels (policy=none); spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Spam-Score: -1.33 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=libre.brussels header.s=mail header.b=n1+0fkh0; dmarc=fail reason="SPF not aligned (relaxed)" header.from=libre.brussels (policy=none); spf=pass (aspmx1.migadu.com: domain of guix-devel-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=guix-devel-bounces@gnu.org X-Migadu-Queue-Id: 3247798D5 X-Spam-Score: -1.33 X-Migadu-Scanner: scn0.migadu.com X-TUID: odYeVEMpBkbo Hi Arun, Researching git-shell, I noticed an example of how Less could be exploited to increase. privileges: =3D> https://hackaday.com/2017/05/10/git-shell-bypass-less-is-more/ It suggests enabling the no-pty flag to mitigate this. I think it would be great to utilise git-shell (and I am interested in it for my own activities. Do anybody have detailed research regarding SSH access with no shell access? Kind regards, Jonathan Arun Isaac writes: > [[PGP Signed Part:Undecided]] > >>> $ export GUIX_DAEMON_SOCKET=3Dssh://charlie@sandbox.guix.gnu.org:22 >>> $ guix build foo >> >> =E2=80=A6requires an SSH access by =E2=80=99charlie=E2=80=99 to sandbox.= guix.gnu.org, And they >> think this access is risky. > > We could provide SSH access but no shell access. We could use some > restricted shell in the spirit of git-shell. All we need is port > forwarding through SSH, not shell access. > > [[End of PGP Signed Part]]