Blogger CMS AR LoxBlog - CS Cross Site Web Vulnerability

Document Title:
===============
Blogger CMS AR LoxBlog - CS Cross Site Web Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1224


Release Date:
=============
2014-03-10


Vulnerability Laboratory ID (VL-ID):
====================================
1224


Common Vulnerability Scoring System:
====================================
2.9


Abstract Advisory Information:
==============================
An independent laboratory researcher discovered a client-side cross site scripting web vulnerability in the official Blogger Content Management System of the arabish LoxBlog.


Vulnerability Disclosure Timeline:
==================================
2014-03-10:	Public Disclosure (Vulnerability Laboratory)


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


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

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


Severity Level:
===============
Low


Technical Details & Description:
================================
A client-side cross site scripting web vulnerability has been discovered in the official Blogger Content Management System of the arabish LoxBlog.
The cross site scripting web vulnerability allows an attacker to manipulate client-side browser requests through a vulnerable application module/function.

The cross site scripting vulnerability is located in the `commenting` module when processing to request via GET method manipulated `blogid` values. 
The injected script code execution occurs on the client-side of the web-application in the comments context. The attack vector is non-persistent 
(client-side) and the request method is GET. The security risk of the client-side web vulnerability is estimated as medium(-) with a cvss (common 
vulnerability scoring system) count of 2.8(+)|(-)2.9.

Exploitation of the client-side cross site web vulnerability requires no privileged web-application user account but low or medium user interaction. 
Successful exploitation of the vulnerability results in session hijacking, client-side phishing, client-side external redirects, malicious GET method 
requests and client-side manipulation of the vulnerable or connected module context.

Request Method(s):
				[+] [GET]

Vulnerable Module(s):
				[+] ./commenting

Vulnerable Parameter(s):
				[+] blogid


Proof of Concept (PoC):
=======================
The client-side cross site scripting web vulnerability can be exploited by remote attackers without privileged application user account and with low or medium user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Dork:  inurl:/commenting/?blogid=  *.php

Payload:  <<script>alert(/CROSS-SITE-SCRIPTING/)</script>>

PoC: http://localhost:8080/commenting/?blogid=<script>alert(/CROSS-SITE-SCRIPTING/)</script>



Solution - Fix & Patch:
=======================
The security vulnerability can be patched by a secure parse and encode with restriction of the vulnerable `blogid` parameter.


Security Risk:
==============
The security risk of the client-side cross site scripting web vulnerability is estimated as medium(-).


Credits & Authors:
==================
Black V!per

# Tnx To: Root.SmasheR|Black V!per|Mr.Moein|UmPire|Sultan Brain|Alireza_Promis
# M4hdi|Social Engineer|TaK.FaNaR|Linux Lover|hack3core|Saeed.Jok3r - http://iransec.net


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