Motorola SB5100E Cable Modem DoS

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Hello.

Sending "land" packet to motorola device, will cause it to crash.

"LanD" packet is simple TCP syn packet:
Source IP = 192.168.100.1
Destanation IP = 192.168.100.1
Source Port = 80
Destanation Port =80
SYN  Flag= 1

One packet can crash modem and all network on cable part will be unreacheble.
Only physical restart can help.

May be other models are vulnerable.

Alexey Sintsov.
mailto:don_@xxxxxxxxxx

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