FreeBSD 6x/7 protosw kernel local privilege escalation exploit. It does not spawn a new shell but gives your current shell euid=0.
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kArp, the Kernel ARP hijacking kernel patch for Linux. Any ethernet driver (including 802.11 drivers) is supported. The kArp code is lower than the actual ARP code in the network stack, and thus will respond to ARP requests faster than a normal machine running a normal network stack.
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