Magento eCommerce Web Sites CosmicSting and CNEXT Remote Code Execution Exploit

This module chains 2 vulnerabilities to deploy an agent in Magento eCommerce Web Sites that will run with the webserver user privileges. The first vulnerability is an XML External Entity Reference that leverages nested deserialization in Magento's handling of JSON data. This vulnerability allows attackers to manipulate XML input to access arbitrary files on the server. The second vulnerability is a heap buffer overflow in the iconv() function of the GNU C Library. This module will use first vulnerability to download the /proc/self/maps and the libc library. These files will allow the calculation of all the memory offsets required to exploit the second vulnerability and deploy an agent.