From owner-freebsd-security Mon Jun 15 13:40:09 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id NAA22909 for freebsd-security-outgoing; Mon, 15 Jun 1998 13:40:09 -0700 (PDT) (envelope-from owner-freebsd-security@FreeBSD.ORG) Received: from khavrinen.lcs.mit.edu (khavrinen.lcs.mit.edu [18.24.4.193]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id NAA22700 for ; Mon, 15 Jun 1998 13:39:09 -0700 (PDT) (envelope-from wollman@khavrinen.lcs.mit.edu) Received: (from wollman@localhost) by khavrinen.lcs.mit.edu (8.8.8/8.8.8) id QAA26276; Mon, 15 Jun 1998 16:39:06 -0400 (EDT) (envelope-from wollman) Date: Mon, 15 Jun 1998 16:39:06 -0400 (EDT) From: Garrett Wollman Message-Id: <199806152039.QAA26276@khavrinen.lcs.mit.edu> To: Eivind Eklund Cc: Darren Reed , security@FreeBSD.ORG Subject: Re: bsd securelevel patch question In-Reply-To: <19980615130652.61198@follo.net> References: <199806151059.KAA13992@ns1.yes.no> <19980615130652.61198@follo.net> Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org < said: > remove the immutable flag, so that is _truly_ pointless. It doesn't > even slow down an attacker. In the past, it certainly has done so. Remember that most kiddie-crackers are totally clueless -- if the version of r00tkit they're running doesn't know how to do it, they don't either. Just the same, my ``public'' machine (xyz.lcs.mit.edu, which is supposed to be one of the ftp?.freebsd.org, but no matter how many times I mention it to DG it never happens; also cvsup3.freebsd.org) has historically run with lots of interesting directories append-only, important files immutable, and securelevel 2. Of course, it also doesn't run sendmail -bd, lpd, or most of the stuff from inetd. (It does run portmap -- which should be optional -- because I never bothered to hack /etc/rc to make it configurable.) -GAWollman -- Garrett A. Wollman | O Siem / We are all family / O Siem / We're all the same wollman@lcs.mit.edu | O Siem / The fires of freedom Opinions not those of| Dance in the burning flame MIT, LCS, CRS, or NSA| - Susan Aglukark and Chad Irschick To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe security" in the body of the message