Date: Mon, 13 Oct 2014 22:42:02 +0200
From: "oststrom \(public\)" <pub@...strom.com>
To: <fulldisclosure@...lists.org>
Subject: [FD] CVE-2014-2022 - vbulletin 4.x - SQLi in breadcrumbs via xmlrpc
	API (post-auth)

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Hash: SHA1

 

CVE-2014-2022 - vbulletin 4.x - SQLi in breadcrumbs via xmlrpc API
(post-auth)

============================================================================
==

 

Overview

- --------

 

    date    :  10/12/2014   

    cvss    :  7.1 (AV:N/AC:H/Au:S/C:C/I:C/A:C) base

    cwe     :  89   

    

    vendor  : vBulletin Solutions

    product : vBulletin 4

    versions affected :  latest 4.x (to date); verified <= 4.2.2

            * vBulletin 4.2.2     (verified)  

            * vBulletin 4.2.1     (verified)  

            * vBulletin 4.2.0 PL2 (verified)  

                        

    exploitability :

            * remotely exploitable

            * requires authentication (apikey)

                

    patch availability (to date) :  None

                

Abstract

- ---------

    vBulletin 4 does not properly sanitize parameters to breadcrumbs_create
allowing

    an attacker to inject arbitrary SQL commands (SELECT).

    

    risk:  rather low - due to the fact that you the api key is required

           you can probably use CVE-2014-2023 to obtain the api key

 

 

 

Details

- --------

    

    vulnerable component: 

        ./includes/api/4/breadcrumbs_create.php

    vulnerable argument:

        conceptid

    

    which is sanitized as TYPE_STRING which does not prevent SQL injections.

 

 

Proof of Concept (PoC)

- ----------------------

 

    see https://github.com/tintinweb/pub/cve-2013-2022

    

    

    1) prerequesites

    1.1) enable API, generate API-key

         logon to AdminCP

         goto "vBulletin API"->"API-Key" and enable the API interface,
generate key

    2) run PoC

         edit PoC to match your TARGET, APIKEY (, optionally DEBUGLEVEL)

         provide WWW_DIR which is the place to write the php_shell to (mysql
must have permissions for that folder)

         Note: meterpreter_bind_tcp is not provided

         run PoC, wait for SUCCESS! message

         Note: poc will trigger meterpreter shell

         

    meterpreter PoC scenario requires the mysql user to have write
permissions 

    which may not be the case in some default installations.

    

    

Timeline

- --------

 

    2014-01-14: initial vendor contact, no response

    2014-02-24: vendor contact, no response

    2014-10-13: public disclosure

    

Contact

- --------

    tintinweb - https://github.com/tintinweb/pub/cve-2013-2022

    

    

(0x721427D8)

    

    

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