From owner-freebsd-questions Fri Nov 21 15:39:53 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.7/8.8.7) id PAA24978 for questions-outgoing; Fri, 21 Nov 1997 15:39:53 -0800 (PST) (envelope-from owner-freebsd-questions) Received: from hq.freegate.com (ns.freegate.com [208.226.86.1]) by hub.freebsd.org (8.8.7/8.8.7) with SMTP id PAA24958 for ; Fri, 21 Nov 1997 15:39:47 -0800 (PST) (envelope-from brent.ngo@freegate.com) Received: (qmail+freegate 3355 invoked by alias); 21 Nov 1997 23:39:15 -0000 Received: from ws141.hq.freegate.com (HELO spawn) (208.226.86.141) by ns.hq.freegate.com with SMTP; 21 Nov 1997 23:39:15 -0000 Message-ID: <34761C73.24D@freegate.com> Date: Fri, 21 Nov 1997 15:42:43 -0800 From: Brent Ngo Organization: FreeGate Corporation X-Mailer: Mozilla 3.02Gold (WinNT; I) MIME-Version: 1.0 To: freebsd-questions@FreeBSD.ORG Subject: "LAND" bug Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk I would like to know asap if FreeBSD 2.2.2 is vulnerable to the following internet bug: >A new denial-of-service attack, known as the 'LAND' bug, is available on >the Internet. It is a short program, that sends exactly one packet (though >many could be sent if desired) to a host. This packet will cause >the host system, if the system has not been fixed, to: > >1) slow down dramatically for a period of time >2) slow down dramatically until rebooted >3) halt processing altogether >or >4) crash and reboot the system > >This packet, while containing nothing special, causes the TCP/IP process >in the system to become confused. The length of the packet is less >than 60 bytes. > >It is recommended that you contact your vendor, and upgrade your system >immediately. Attached is a list of systems. It may not be complete, >nor accurate - please see your vendor for more information.