Created
November 5, 2015 08:31
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パーフェクトPHP コマンド実行攻撃(Command Injection)対応方法
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<?php | |
// 一覧を出力するディレクトリを$dir変数にセット | |
if (isset($_GET['dir']) === true) { | |
// nullバイトを削除 | |
$dir = str_replace("\0", '', $_GET['dir']); | |
} else { | |
$dir = '/'; | |
} | |
// ディレクトリ内のファイル一覧を出力 | |
echo "<pre>"; | |
if (file_exists($dir) && is_dir($dir)) { | |
// 外部コマンドへの引数をエスケープして実行 | |
system('ls -la ' . escapeshellarg($dir)); | |
} | |
echo "</pre>"; |
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