Cisco IOS ICMP Redirect DoS1

　　Cisco Systems IOS is vulnerable to a denial-of-service attack using ICMP
　　Redirect messages.
　　
　　When flooded with ICMP redirect messages, the IOS uses up all its memory
　　to store the new host routes. The device is then unable to perform
　　operations that need additional memory such as receiving routing updates
　　and accepting inbound telnet(1) connections.
　　
　　DETAILS
　　
　　Known vulnerable combinations:
　　* Cisco 1005 with IOS 11.0(18)
　　* Cisco 1603 with IOS 11.3(11b)
　　* Cisco 1603 with IOS 12.0(3)
　　* Cisco 2503 with IOS 11.0(22a)
　　* Cisco 2503 with IOS 11.1(24a)
　　
　　Known to be not vulnerable:
　　* Cisco 1603 with IOS 12.1(11)
　　* Cisco 1603 with IOS 12.2(5)<

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