# High

## High

Command Injection level High on DVWA

Di bawah ini adalah *source-code* dari *command injection* level high di DVWA.

```php
vulnerabilities/xss_r/source/high.php
<?php
​
header ("X-XSS-Protection: 0");
​
// Is there any input?
if( array_key_exists( "name", $_GET ) && $_GET[ 'name' ] != NULL ) {
    // Get input
    $name = preg_replace( '/<(.*)s(.*)c(.*)r(.*)i(.*)p(.*)t/i', '', $_GET[ 'name' ] );
​
    // Feedback for end user
    echo "<pre>Hello ${name}</pre>";
}
​
?> 
```

## Mencari Informasi <a href="#mencari-informasi" id="mencari-informasi"></a>

Pada level ini, *blacklist* yang diberikan menjadi semakin banyak. Tetapi jika kita teliti, di baris ke-11 terdapat celah😁 . `'| ' => ''` terdapat spasi setelah `|` . Ini bisa kita manfaatkan dengan cara menjalankan perintah langsung tanpa spasi setelah `|`.

## Melakukan Serangan <a href="#melakukan-serangan" id="melakukan-serangan"></a>

Sekarang kita coba menginputan `8.8.8.8 |whoami` (digabung antara pipeline dan command) seperti berikut:

![](https://gblobscdn.gitbook.com/assets%2F-LzH5Vfe8_AlGL8KPrs2%2F-LzNB8sTkF__Fy92pViR%2F-LzNr7a78vhc-PR1t13X%2Fimage.png?alt=media\&token=38f4f8db-c7c6-4720-a59a-800ef37ee70d)


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