I've seen the same thing with a 3com NIC that went bad, brought down an entire subnet and it was plugged into a docking station that wasn't powered up.
----- Original Message ----- From: "Ng, Kenneth (US)" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; "Sean Batt" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Thursday, May 13, 2004 12:36 PM Subject: RE: [Full-Disclosure] (AUSCERT AA-2004.02) AUSCERT Advisory - Denial of Service Vulnerability in IEEE 802.11 Wireless Devices (fwd) > 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 > > _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.netsys.com/full-disclosure-charter.html
