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Serious TCP/IP Vulnerability Exposed

Written by Administrator. Posted in Security News

In a rather startling revelation, the UK's National Infrastructure Coordination Centre has discovered a major flaw in TCP/IP that could allow hackers to crash vulnerable routers and severely disrupt Internet traffic. The problem stems from the fact that it's far easier to reset TCP/IP sessions using spoofed packets than previously thought. In short, the exact sequence number need not be predicted as most TCP/IP implementations will accept any sequence number that falls in a particular range ! This makes predicting the sequence number much easier, and thus spoofing RST packets is possible. Vendors such as Cisco are rushing patches.


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