From owner-freebsd-bugs@freebsd.org Mon Dec 12 12:01:24 2016 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C7D8DC72A2D for ; Mon, 12 Dec 2016 12:01:24 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 999A71FA1 for ; Mon, 12 Dec 2016 12:01:24 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id uBCC1O3B070106 for ; Mon, 12 Dec 2016 12:01:24 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 215250] jail break under particular circumstance Date: Mon, 12 Dec 2016 12:01:24 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 11.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: simonp@email.it X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Dec 2016 12:01:24 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D215250 Bug ID: 215250 Summary: jail break under particular circumstance Product: Base System Version: 11.0-STABLE Hardware: Any OS: Any Status: New Severity: Affects Many People Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: simonp@email.it I do not understand if this is really a bug, anyway i am submitting this because i think it could be the top of a more complex "iceberg". How to reproduce: -------------------------------------------------------- jailhost is the host machine thejail is the jailed machine remote#ssh user@thejail // log into the jail from a remote system thejail$su // became superuser into the jail thejail#cd /usr/ports // log into any folder of the jail Now from jailhost move the jail folder into the jailhost hierarchy jailhost#mv /jailz//usr/ports /jailz/ports // !!! Now, from inside thejail thejail#pwd /jailz/ports // !!! logged into the host=20=20=20 thejail#cd .. // you can navigate the host filesystem thejail#pwd / thejail#cd etc thejail#pwd /etc thejail#cat rc.conf // see host file contents=20=20 hostname=3D"jailhost.mydomain" ... thejail#uname -a // while you are inside the jail ... FreeBSD jailhost.mydomain 11.0-RELEASE-p1 ... -------------------------------------------------------- I understand that this is a very particular situation and i don't know if it is an expected behaviour just submitting because it sounds quite unexpected ... Cheers Paolo --=20 You are receiving this mail because: You are the assignee for the bug.=