I've been around long enough to remember having an AUI NIC that would take down a segment even when the NIC WAS NOT PLUGGED INTO THE PC. Suspicion was that there was a short in the transceiver that was causing massive reflections back into the segment.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: Thursday, May 13, 2004 11:21 AM To: Sean Batt Cc: [EMAIL PROTECTED] Subject: Re: [Full-Disclosure] (AUSCERT AA-2004.02) AUSCERT Advisory - Denial of Service Vulnerability in IEEE 802.11 Wireless Devices (fwd) On Thu, 13 May 2004 15:22:19 +1000, Sean Batt <[EMAIL PROTECTED]> said: > =========================================================================== > AA-2004.02 AUSCERT Advisory > > Denial of Service Vulnerability in IEEE 802.11 Wireless Devices > 13 May 2004 .... > The vulnerability is related to the medium access control (MAC) > function of the IEEE 802.11 protocol. WLAN devices perform Carrier > Sense Multiple Access with Collision Avoidance (CSMA/CA), which "Protocols that work by listening for silence to know when it's OK to start sending will lock up if something transmits continuous non-silence". Am I the only person around who's been in this business long enough to remember how one jabbering transciever can take down an entire Ethernet thinwire or thickwire segment?? This is right up there with the recent "Wow, RFC793 says an RST only has to be in the window, not right on it" TCP "hole". ***************************************************************************** The information in this email is confidential and may be legally privileged. It is intended solely for the addressee. Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken or omitted to be taken in reliance on it, is prohibited and may be unlawful. When addressed to our clients any opinions or advice contained in this email are subject to the terms and conditions expressed in the governing KPMG client engagement letter. ***************************************************************************** _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
