DoS Hole Found in Linux Kernel

A DoS vulnerability found in Kernels 2.4.

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Full article here
By flooding a Linux system with packets with spoofed source addresses, the handling of the cache will consume large amounts of CPU power. This could potentially bring a Linux system offline with a rate of only 400 packets per second by using carefully chosen source addresses that causes hash collisions in the table

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If u want 2 understand the theory here comes an excellent white paper about hash attacks