Cisco Live is Cisco’s annual IT and communications conference and this year is the 20th Anniversary of the Cisco Networkers program.
“This year marks the 20th anniversary of Networkers, which has grown into Cisco Live, our annual IT and communications conference. Much has changed since that first conference in 1989. But one thing remains as true [...]

On March 25, 2009, the The Cisco Product Security Incident Response Team (PSIRT) has published 8 new vulnerability advisories. Mainly these vulnerabilities are DOS attack.
 
1) Cisco IOS cTCP Denial of Service Vulnerability
A series of TCP packets may cause a denial of service (DoS) condition on Cisco IOS devices that are configured as Easy VPN servers [...]

On 19 March 2009, Cisco announced its intent to acquire privately held Pure Digital Technologies Inc. San Francisco-based Pure Digital, creator of the best-selling Flip VideoTM brand, is a pioneer in developing consumer-friendly video solutions with mass-market appeal.
“The acquisition of Pure Digital is key to Cisco’s strategy to expand our momentum in the media-enabled home and [...]

On 4 March 2009 and on 11 March 2009, Cisco has published two new security advisories, which can be exploited by malicious people to conduct a DOS attack or a Remote control attack.
1) Cisco 7600 Series Router Session Border Controller Denial of Service Vulnerability
A denial of service (DoS) vulnerability exists in the Cisco Session Border Controller (SBC) for [...]

The spanning-tree protocol is used to cut loops that redundant links create in bridge networks. These packets are not attested by the system, so an attacker could spoof the BPDU and compromise the network stability!
See below to understand BPDU attack:
In this example the Ciscozine1 switch is elected Root Bridge due to the lower MAC-address (suppose that [...]

Surfing the web, I have found a nice article about BGP weakness. This document, entitled “Defending Against BGP Man-In-The-Middle Attacks“, was presented by Earl Zmijewski during Black Hat DC 2009 (Hyatt Regency Crystal City – February 16-17 – Arlington, Virginia).
The slides focus on four points:

BGP Routing Basics – Enough to understand and identify the threat

BGP Update [...]

NASA and Cisco Inc. announced Tuesday a partnership to develop an online collaborative global monitoring platform called the “Planetary Skin” to capture, collect, analyze and report data on environmental conditions around the world.
Under the terms of a Space Act Agreement, NASA and Cisco will work together to develop the Planetary Skin as an online collaborative [...]