From owner-freebsd-current Wed May 27 11:44:11 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id LAA29711 for freebsd-current-outgoing; Wed, 27 May 1998 11:44:11 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA29674 for ; Wed, 27 May 1998 11:43:55 -0700 (PDT) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.8.8/8.8.5) with ESMTP id KAA00888; Wed, 27 May 1998 10:39:28 -0700 (PDT) Message-Id: <199805271739.KAA00888@dingo.cdrom.com> X-Mailer: exmh version 2.0zeta 7/24/97 To: "Brian Feldman" cc: freebsd-current@FreeBSD.ORG Subject: Re: current instabilities In-reply-to: Your message of "27 May 1998 03:23:29 -0000." <19980527032329.16263.qmail@m2.findmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 27 May 1998 10:39:28 -0700 From: Mike Smith Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > 2) "options VM86" - EVIL EVIL EVIL! This really allows way too much > access to the memory by a mortal I'm curious as to what you mean by this. What "memory" does it allow access to? >, and it's an effective DoS attack if a > user runs doscmd, say, and a certain executable (this time, I happened > to try ZSnes). There may still be bugs in the vm86 handling, and we'd like to know if you find them. What you were running sounds like a graphical program, and there is no support for graphics in doscmd. You wouldn't happen to have run with the '-r' flag now would you? > Think there may be a way to make this safer? (I locked > myself up, and it didn't panic so I don't know what exact function > caused it). Also, could USER_LDT possibly be used as a DoS attack, like > it seems to me it could? Again, it shouldn't, no. What services do you plan to deny? -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message