X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-type; q=dns; s=default; b=VUyHfjn 4vMrPqGCBQbnpz0qMES21Pd//qMY4hW/N+dEvMzU4evodK/zSQwgXlb11K+XxwdX PPtUcfI653DPdjy+f5t/vUHMwlv/ULX6U81OmNkGv9QRoFDjWYfGUh1NIuZXIVDq RL+a6dfZaGDuEVGerlEQ3d7TI+0yv+p/+dos= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-type; s=default; bh=Zh/z0ezCDO8mB FhK+t2X8qDDQQQ=; b=tSVDIOzE/eZVvU/rLfchgiGvSw2X4N7sGrGWf4z1sN7IT B3l/FEP9o34MFh6dRuK4f/CgRtJXZ/F88nIYdFY9Q3Qn74wxUMCFfYG+wZO7FObp d6gDn6o39L8+a7JqBVw1gC2nESL9gMGrFkOcaX7qrgND5QZTvI7NYspnkuYlsg= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.5 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.1 spammy=H*c:alternative, she X-HELO: mout.gmx.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=mail.com; s=dbd5af2cbaf7; t=1552492734; bh=e7SNC1xfELcXmBKXqkmlEgMGRMlHvnQxvAfssVZA0pg=; h=X-UI-Sender-Class:References:In-Reply-To:From:Date:Subject:To; b=riPKRyu6QpHnon9u9mN+KrRtv/8M79IuEKBZ4r0ypqpv2eG8iM9muhEv9K29JiWfg MugGgs1SgYomBEtVVAI48uXkAjMgwaamkNKQqT1bev8N57KXnsGf6y5Iwcpx1Ak7w8 CFRKd2vBUH8F068gDgm5/P7mPSLIprR+JuAw2p8Y= X-UI-Sender-Class: 214d933f-fd2f-45c7-a636-f5d79ae31a79 MIME-Version: 1.0 References: <20190313085650 DOT GS3785 AT calimero DOT vinschen DOT de> <20190313152901 DOT GA18873 AT calimero DOT vinschen DOT de> In-Reply-To: <20190313152901.GA18873@calimero.vinschen.de> From: Bill Stewart Date: Wed, 13 Mar 2019 09:58:25 -0600 Message-ID: Subject: Re: sshd privsep user still required? To: cygwin AT cygwin DOT com Content-Type: text/plain; charset="UTF-8" X-IsSubscribed: yes On Wed, Mar 13, 2019 at 9:29 AM Corinna Vinschen wrote: > > However: It's still the case that the user cannot bypass OS security even > > if he or she "escapes" from the jail, right? > > > > My goal is to restrict sftp browsing on the client side. > > > > Using ChrootDirectory with "ForceCommand internal-sftp" in sshd_config > > seems to accomplish this. > > > > Is this not correct? > > It seems like it, but I wouldn't bet on it. The fact that /cygdrive and > /dev directories are still visible inside the chroot jail speaks against > that. So to summarize: Even though the fake chroot doesn't increase security, it doesn't reduce it, either. In other words, even if the user "escapes" the jail, he or she can still only do what the underlying OS permits. Bill -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple