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Kleefa v1.7 (IR) - Multiple Web Vulnerabilities



Document Title:
===============
Kleefa v1.7 (IR) - Multiple Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1677


Release Date:
=============
2016-01-23


Vulnerability Laboratory ID (VL-ID):
====================================
1677


Common Vulnerability Scoring System:
====================================
8.3


Product & Service Introduction:
===============================
What is Klyfa? In fact, a very advanced script to create the Upload Center and create a service for uploading and downloading files Klyfa a 
number of free and commercial templates and extensions addition Klyfa has a website and forum Persian strong support that distinguishes 
it with the other scripts.

(Copy of the Vendor Homepage: http://kleefa.ir/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory research group discovered multiple vulnerabilities in the official Kleefa v1.7 content management system.


Vulnerability Disclosure Timeline:
==================================
2016-01-23: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Klyja
Product: Kleefa - Content Management System 1.7


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


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


Technical Details & Description:
================================
1.1
A remote sql injection web vulnerability has been discovered in the official Kleefa v1.7 Content Management System.
The vulnerability allows remote attackers to execute own sql commands to compromise the web-applicaation or connected dbms.

An attacker might execute arbitrary SQL commands on the database server with this vulnerability. User tainted data is used when creating 
the database query that will be executed on the database management system (DBMS). An attacker can inject own SQL syntax thus initiate 
reading, inserting or deleting database entries or attacking the underlying operating system depending on the query, DBMS and configuration.

The security risk of the sql injection vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 8.3.
Exploitation of the remote sql injection web vulnerability requires no user interaction or privileged web-application user account.
Successful exploitation of the remote sql injection results in database management system, web-server and web-application compromise.

Request Method(s):
				[+] GET

Vulnerable File(s):
				[+] index.php > (mysqli.php)

Vulnerable Parameter(s):
				[+] id


1.2
A client-side xss web vulnerability has been discovered in the official Kleefa v1.7 Content Management System.
A vulnerability allows remote attackers to inject malicious script codes on the client-side of the affected web-application.

An attacker might execute arbitrary HTML/JavaScript Code in the clients browser context with this security vulnerability. User tainted data 
is embedded into the HTML output by the application and rendered by the users browser, thus allowing an attacker to embed and render 
malicious code. Preparing a malicious link will lead to an execution of this malicious code in another users browser context when clicking 
the link. This can lead to local website defacement, phishing or cookie stealing and session hijacking.

The security risk of the client-side web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.3. 
Exploitation of the non-persistent web vulnerability requires a no privilege web-application user account and low or medium user interaction. 
Successful exploitation results in session hijacking, non-persistent phishings attacks, non-persistent external redirect and malware loads or 
non-persistent manipulation of affected or connected module context.

Request Method(s):
					[+] GET

Vulnerable Module(s):
					[+] $_GET + echo()

Affected File(s):
					[+] index.php

Vulnerable Parameter(s):
					[+] name


Proof of Concept (PoC):
=======================
1.1 Blind SQL Injection
The sql injection web vulnerabilities can be exploited by remote attackers without privileged web-application user account or user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

File: /includes/mysqli.php


PoC: Demonstration
$_GET + mysqli_query() = SQL Injection vulnerability


Vulnerable Code: (Review)
mysql_query("SELECT * FROM users WHERE id = "  .  $_GET["id"]); 
161: mysqli_query mysqli_query($this->connect_id, $query);  // mysqli.php
132: ? function query($query, $transaction = false)

Requirements:
145: if(!empty($query))


PoC: Exploitation
/index.php?id=1 OR 1=1--[SQL INJECTION VULNERABILITY!]-



1.2 Cross-Site Scripting
The client.side cross site scripting web vulnerability can be exploited by remote attackers without privileged web-application user account and with low user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

File: /do.php

PoC: Demonstration
$_GET + echo() = Cross-Site Scripting vulnerability 

Vulnerable Code: (Review)
print ("Hello "  .  $_GET["name"]);  

PoC: Exploitation
/index.php?name=<script>alert(document.cookie)</script>
/index.php?name=">"<script>alert(document.domain)</script>


Solution - Fix & Patch:
=======================
1.1
The vulnerability can be patched by usage of a prepared sql statement when processing to request.

1.2
The client-side cross site scripting web vulnerability can be patched by a secure parse and encode of the vulnerable name value in the index.php file.
Restrict the input and disallow special chars.


Security Risk:
==============
1.
The security risk of the remote sql injection web vulnerabilities in the web-application are estimated as high. (CVSS 8.3)

2.
The security risk of the cross site scripting web vulnerabilities in the web-application are estimated as medium. (CVSS 3.3)


Credits & Authors:
==================
Iran Cyber Security Group - (ICG SEC)


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