Date: Tue, 28 Jul 1998 22:28:15 +0000 From: Niall Smart <rotel@indigo.ie> To: Terry Lambert <tlambert@primenet.com>, n@nectar.com (Jacques Vidrine) Cc: hackers@FreeBSD.ORG Subject: Re: inetd enhancements Message-ID: <199807282128.WAA01426@indigo.ie> In-Reply-To: <199807272316.QAA04693@usr05.primenet.com>; Terry Lambert <tlambert@primenet.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Jul 27, 11:16pm, Terry Lambert wrote: } Subject: Re: inetd enhancements > > > Root can escape > > > a chroot jail because of the way the chroot root vnode is (in my > > > opinion) incorrectly set to NULL instead of the real root for the > > > non-chroot case (fixing this would incidently simplify the namei code). > > > > > > The "ftpd" case is especially vulnerable... > > > > I don't follow. Could you give an example scenario of an exploit? > > I spared the list my code for doing this, sending it only to the > questioner. Thank you, Terry. You can also effectively break out of chroot with ptrace. Niall -- Niall Smart, rotel@indigo.ie. Amaze your friends and annoy your enemies: echo '#define if(x) if (!(x))' >> /usr/include/stdio.h To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199807282128.WAA01426>