Asterisk2Billing v1.9.4 - Blind SQL Injection Vulnerability

Document Title:
===============
Asterisk2Billing v1.9.4 - Blind SQL Injection Vulnerability



Release Date:
=============
2011-08-16


Vulnerability Laboratory ID (VL-ID):
====================================
250


Product & Service Introduction:
===============================
Asterisk ist eine freie Software, die alle Funktionalitäten einer herkömmlichen Telefonanlage abdeckt. Asterisk unterstützt 
Voice-over-IP (VoIP) mit unterschiedlichen Protokollen und kann mittels relativ günstiger Hardware mit Anschlüssen wie POTS 
(analoger Telefonanschluss), ISDN-Basisanschluss (BRI) oder -Primärmultiplexanschluss (PRI, E1 oder T1) verbunden werden. 
Durch die umfangreiche Anzahl von unterstützten Protokollen und Schnittstellen ist Asterisk für öffentliche Telefonanbieter 
und Callcenter genauso geeignet wie für den Privathaushalt. Viele VoIP-Provider sind mittels Asterisk aufgebaut. Durch die 
Skripting-Möglichkeiten in Asterisk lässt sich die Telefonanlage nahezu beliebig konfigurieren und erweitern.

The A2Billing solution comprises of the following components: -

    * Server: The computer to run the system.
    * Line Interface Cards: The Digium hardware (optional)to connect to the TDM network (PRI, BRI, Analogue)
    * Linux: The base operating system
    * Asterisk: The telephony engine
    * Apache: The web server
    * MySQL/Postgresql: The back end database
    * A2Billing: The Billing engine handling Authentication, Authorisation and Accounting. 

A2Billing is included in several stable linux distributions & is most famous phone system.

(Copy of the Vendor Homepage: http://de.wikipedia.org/wiki/Asterisk_(Telefonanlage))


Abstract Advisory Information:
==============================
The Vulnerability-Lab Team discovered  blind SQL Injection vulnerability on the Asterisk 2 Billing  web application.


Vulnerability Disclosure Timeline:
==================================
2011-08-12: Discovery by Vulnerability-Lab


Discovery Status:
=================
Published


Affected Product(s):
====================

Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
A blind SQl injection vulnerability is detected on Asterisk2Billing Application. Remote Attackers & privileged 
user accounts can inject/execute blind own sql statements to compromise the application dbms.

Vulnerable Module(s):
								[+] entity_payment_settings  - ID


Proof of Concept (PoC):
=======================
The bild SQL Injection vulnerability can be exploited by remote attackers or local privileged user accounts.
For demonstration or reproduce ...

Path:		A2B/Public/
File:		A2B_entity_payment_settings.php
Para:		?method=plugnpay&id=[SQL-Injection]&result=success


Security Risk:
==============
The security risk of the blind sql injection vulnerability is estimated as high


Credits & Authors:
==================
Vulnerability Research Laboratory


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