php使用exec shell命令注入的方法讲解

复制代码 代码如下:

<?php
$last = exec('ls', $output, $return);
print_r($output);
echo "Return [$return]";
?>

复制代码 代码如下:

$ ls
total 0
-rw-rw-r--  1 chris chris 0 May 21 12:34 php-security
-rw-rw-r--  1 chris chris 0 May 21 12:34 chris-shiflett

复制代码 代码如下:

Array
(
  [0] => total 0
  [1] => -rw-rw-r--  1 chris chris 0 May 21 12:34 php-security
  [2] => -rw-rw-r--  1 chris chris 0 May 21 12:34 chris-shiflett
)
Return [0]

复制代码 代码如下:

<?php
$clean = array();
$shell = array();
/* Filter Input ($command, $argument) */
$shell['command'] = escapeshellcmd($clean['command']);
$shell['argument'] = escapeshellarg($clean['argument']);
$last = exec("{$shell['command']} {$shell['argument']}", $output, $return);
?>