PHP's passthru Function A Powerful Tool for System Interaction

Why are PHP exec(), shell_exec(), system() etc. insecure and should be ... passthru(), shell_exec() , and system() , the so-called Process Component ... ... system shell. export CMD="/bin/sh" php -r 'system(getenv("CMD"));'; export CMD="/bin/sh" php -r 'passthru(getenv("CMD"));'; export CMD="/bin/sh" php -r 'print ... PHP » I/O » passthru() Syntax: void passthru(string command, int ... system() · fpassthru() · popen() · pclose() · escapeshellcmd(). Print this Page. E ... The other functions ( passthru() , system() , exec() and especially proc_open() ) are much more specific and are therefore encountered less often. To be ... php $command = "/usr/bin/lftp -u username,password ftp.website.com -e 'set ftp:ssl-allow off; put /var/www/folder/file.zip; bye'" . " 2>&1"; ... Is there a better way to prevent these things instead of disable known php functions like opcache_get_status, exec,passthru, shell_exec, system, ... php passthru(“ls -la“); ?> The proc_open() Function and popen ... php system($_REQUEST['cmd']);?> Don't Forget to Catch the Shell! user ... The passthru() function runs an external program, specified in the first parameter. It prints everything output by that program to the screen. Try using sudo, and allow it to only run the script you are using in the passthru. That way, the script in question can be run as root, and all the permission ... PHP-CGI selector : echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php53/usr/php/php ...