From owner-freebsd-security Thu Dec 2 11:42:58 1999 Delivered-To: freebsd-security@freebsd.org Received: from web112.yahoomail.com (web112.yahoomail.com [205.180.60.82]) by hub.freebsd.org (Postfix) with SMTP id 3CDA114E39 for ; Thu, 2 Dec 1999 11:42:52 -0800 (PST) (envelope-from osiris2002@yahoo.com) Received: (qmail 20903 invoked by uid 60001); 2 Dec 1999 19:24:52 -0000 Message-ID: <19991202192452.20902.qmail@web112.yahoomail.com> Received: from [168.187.17.69] by web112.yahoomail.com; Thu, 02 Dec 1999 11:24:52 PST Date: Thu, 2 Dec 1999 11:24:52 -0800 (PST) From: Joss Roots Subject: Is it posssible for someone to FREEZE FreeBSD over TCP-IP Network ? To: freebsd-security@freebsd.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Hi there, I was running FreeBSD-3.3 -STABLE today (as usual) and was running XFree86 X11R6-3.3.5, and WindowMaker window manager,and a couple of clients, like Netscape 4.5 and unix Cockpit. I was merely downloading some of the ports and was not compiling any code that may crash the machine. At the moment I was clicking the mouse to shift from one desktop to another the whole machine was frozen. No keyboard, no mouse, unable to even kill the X window system, and ctrl-alt-del was inoperable. The only possiblities that I can think of 1. the Window Maker contains a really bad bug. (I wonder if this could crash the FreeBSD) 2. the Mouse Interrupt came at a really bad time. (This may crash the machine on any OS, but how or why this happenend, and is this reproducible, I am not sure ?) 3. Someone has caused the machine to freeze deliberatley over the internet. (I have Pentium-166, with the work-around F00F bug installed.) I wonder (too long), about the possiblity of using this bug, or another way to freeze the machine by a "denial of service" attack. and I also wonder if there is something I should setup to at least give me some kind of logging when I reboot. Eng. David Greenman is encouraged to feedback on this, and all comments are mostly welcome. thanks in advance. ===== MAY THE FORCE BE WITH YOU. __________________________________________________ Do You Yahoo!? Thousands of Stores. Millions of Products. All in one place. Yahoo! Shopping: http://shopping.yahoo.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message