Simple Member v1.2.x - Auth Bypass Vulnerability

Document Title:
===============
Simple Member v1.2.x - Auth Bypass Vulnerability



Release Date:
=============
2011-06-13


Vulnerability Laboratory ID (VL-ID):
====================================
126


Product & Service Introduction:
===============================
Simple Member allows you to put up that much needed protective area on your web site where you don t want anyone 
snooping without first signing up. Requirements: - PHP 4 - MySQL

(Copy of the Vendor Homepage: sourceforge.net)


Abstract Advisory Information:
==============================
Vulnerability-Lab Team discovered a SQL-Injection Vulnerability on the CMS Simple Member v1.2a.
The vulnerability allows an remote attacker to get unauthorized database & application access.


Vulnerability Disclosure Timeline:
==================================
2011-06-08:	Public or Non-Public Disclosure


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


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

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


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


Technical Details & Description:
================================
Remote attackers can use the detected Sql-Injection vulnerability for an unauthorized Auth-Bypass. Attackers can use a existing 
uid and can try $_REQUEST[pwd] with a string like or 1=1/*. The result of the test is a auth bypass via sql injection.

Vulnerable Modules:
			[+] Members


Proof of Concept (PoC):
=======================
The vulnerability can be exploited by unauthorized remote attackers. For demonstration or reproduce ...

Path: 		http://www.example.com/SimpleMember/
File: 		member.php
Parameter: 	?pwd=
Input: 		'OR 1=1/*

PoC: 		http://www.example.com/SimpleMember/member.php?pwd='OR 1=1/*


Solution - Fix & Patch:
=======================
Vulnerable File:	member.php
Bad Statement: 		$res = mysql_query(SELECT * FROM users WHERE uid=$uid AND pwd=\\\'$pwd\\\' and status=active);

Use the prepaired statement & class to fix the sql vulnerability. Escape & filter the input validation for login and a parse 
on parameter ?pwd= 


Security Risk:
==============
The security risk of the vulnerability is estimated as high. The vulnerability allows to bypass the login via sql injection attack.


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


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