It uses the system() function to execute commands that are being passed through ‘cmd’ HTTP request GET parameter. Note: The backtick character (`) should not to be confused with the single quote character (‘) $output" īased on the above, the following is a PHP web shell in its simplest form. Surprisingly, not many PHP developers are aware of this but PHP will execute the contents of backticks (`) as a shell command. By using proc_open(), we can create a handler (process) that will be used for communication between our script and the program that we want to run. The proc_open() function can be difficult to understand (you can find a detailed description of the function in the PHP docs). rw-rw-r- 1 secuser secuser 29 Feb 28 18:23 shell.php proc_open() ĭrwxrwxr-x 2 secuser secuser 4096 Feb 28 18:23. The passthru() function executes a command and returns output in raw format. rw-rw-r- 1 secuser secuser 36 Feb 28 18:24 shell.php The shell_exec() function is similar to exec(), however, it outputs the entire result as a string. => -rw-rw-r- 1 secuser secuser 49 Feb 27 20:54 shell.php ) shell_exec() => drwxrwxr-x 2 secuser secuser 4096 Feb 27 20:55. If a second parameter is specified, the result is returned in an array. > -rw-rw-r- 1 secuser secuser 29 Feb 27 20:49 shell.php Using echo with the exec() function will only print the last line of the command output. Otherwise, only the last line of the result will be shown if echoed. If a second optional parameter is specified, the result will be returned as an array. The exec() function accepts a command as a parameter but does not output the result. rw-rw-r- 1 secuser secuser 26 Feb 27 20:41 shell.php
ĭrwxrwxr-x 2 secuser secuser 4096 Feb 27 20:43. Įxecuting the ls command on a Linux machine achieves a similar result.
#App wrapper to spawn shells windows
The following example on a Microsoft Windows machine will run the dir command to return a directory listing of the directory in which the PHP file is executed. The system() function accepts the command as a parameter and it outputs the result. Note: For the purposes of this article, we edited our hosts file and pointed the domain to a test server.
0 kommentar(er)
