20 lines
888 B
Markdown
20 lines
888 B
Markdown
---
|
|
title: Local File Inclusion
|
|
---
|
|
## Local File Inclusion
|
|
|
|
A vulnerability in the application caused by the programmer requiring a file input provided by the user and not sanitizing the input before accessing the requested file. This results in a file being included where it should not of been.
|
|
|
|
### Example local file inclusion attacks
|
|
A website allows you to view PDFs as `download.php?file=myfile.php`, due to a lack of proper checking a malicious user is able to request /etc/passwd and get sensitive configuration information from the web server.
|
|
|
|
### Defending your website from local file inclusion attacks in PHP
|
|
```PHP
|
|
<?php
|
|
if(basename($_GET['file]) !== $_GET['file']) {
|
|
die('INVALID FILE REQUESTED');
|
|
}
|
|
```
|
|
#### More Information:
|
|
* <a href="https://www.owasp.org/index.php/Testing_for_Local_File_Inclusion" rel="nofollow">OWASP Wiki - Testing for Local File Inclusion</a>
|