An issue was discovered in rConfig 3.9.2. An attacker can directly execute system commands by sending a GET request to ajaxServerSettingsChk.php because the rootUname parameter is passed to the exec function without filtering, which can lead to command execution.
https://gist.github.com/mhaskar/ceb65fa4ca57c3cdccc1edfe2390902e
https://drive.google.com/open?id=1OXI5cNuwWqc6y-7BgNCfYHgFPK2cpvnu
https://drive.google.com/file/d/1bTpTn4-alJ8qGCEATLq-oVM6HbhE65iY/view?usp=sharing
http://packetstormsecurity.com/files/155186/rConfig-3.9.2-Command-Injection.html
http://packetstormsecurity.com/files/154999/rConfig-3.9.2-Remote-Code-Execution.html