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Photos In Wifi 1.0.1 File Upload

Photos In Wifi 1.0.1 File Upload
Posted Sep 28, 2015
Authored by Benjamin Kunz Mejri, Vulnerability Laboratory | Site vulnerability-lab.com

Photos in Wifi version 1.0.1 suffers from a remote shell upload vulnerability.

tags | exploit, remote, shell
SHA-256 | 4a00b037a1dc3051f06630d1a90f45ed20afc5751a1f8f286020dfd2832f6a2b

Photos In Wifi 1.0.1 File Upload

Change Mirror Download
Document Title:
===============
Photos in Wifi v1.0.1 iOS - Arbitrary File Upload Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1600


Release Date:
=============
2015-09-28


Vulnerability Laboratory ID (VL-ID):
====================================
1600


Common Vulnerability Scoring System:
====================================
8.6


Product & Service Introduction:
===============================
Share the photos and videos of your iPhone/iPad in wifi. Upload photos and videos right to your camera roll without iTunes.
With Photos In Wifi, you can share your whole camera roll, and album, or a selection of photos and videos. Once the app
server is started, you can view, play and download the shared photos and videos from any computer or smartphone web browser.
You can also upload a photo, a video, or a zip file containing 100`s of photos and videos, right into your iPhone/iPad
camera roll. You can also use Photos In Wifi to send multiples full resolution photos and videos in a single email or MMS.

(Copy of the Homepage: https://itunes.apple.com/us/app/photos-in-wifi-share-photos/id966316576 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Core Research Team discovered an arbitrary file upload web vulnerability in the Photos in Wifi v1.0.1 iOS mobile web-application.


Vulnerability Disclosure Timeline:
==================================
2015-09-28: Public Disclosure (Vulnerability Laboratory)


Discovery Status:
=================
Published


Affected Product(s):
====================
Sebastien BUET
Product: Photos In Wifi - iOS Mobile (Web-Application) 1.0.1


Exploitation Technique:
=======================
Remote


Severity Level:
===============
High


Technical Details & Description:
================================
An arbitrary file upload web vulnerability has been discovered in the official Photos in Wifi v1.0.1 iOS mobile web-application.
The vulnerability allows remote attackers to upload an arbitrary (malicious) file to compromise the iOS wifi web-application.

The arbitrary file upload vulnerability is located in `Select a photo or a video to upload` module. Remote attackers are able to intercept
the vulnerable `filename` value in the `upload > submit` POST method request to compromise the mobile device or interface app. The attacker
can use a live session tamper for http to change the `filename` value to a webshell. After the upload the attacker requests the
`asset.php` file to execute the stored malicious file. The encoding of the `ext` value and the parse of the `filename` value is broken
which results obviously in this type behavior. The injection point of the issue is the upload POST method request with the vulnerable
filename value. The execution point occurs in the `assets.php` file when processing to display the images or videos. The upload file path
execution is not restricted (flag) and helps an attacker in case of exploitation to easily upload or access webshells.

Exploitation of the remote web vulnerability requires no user interaction and also no privileged web application user account.
Successful exploitation of the arbitrary file upload vulnerability results in web-server, web module, website or dbms compromise.

Vulnerable Module(s):

[+] ./assets-library://asset/
Vulnerable File(s):
[+] asset.php


Proof of Concept (PoC):
=======================
The arbitrary file upload vulnerability can be exploited by remote attackers without privilege web-application user account or user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Manual steps to reproduce the vulnerability ...
1. Start the web-server (wifi)
2. Go to another computer and login by requesting via http localhost
3. Click upload and choose a random file
4. Start a live session tamper for http
5. Submit the upload to continue with the POST method request
6. Inject to the filename value a webshell code
7. Continue to reply the request
8. The server responds with 200OK
9. Open the poc url of the path to execute the webshell to compromise the mobile device or mobile app
10. Successful reproduce of the arbitrary file upload vulnerability!

PoC: URL
http://localhost/assets-library://asset/asset.php?id=40C9C332-857B-4CB8-B848-59A30AA9CF3B&ext=php


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost/
Load Flags[VALIDATE_ALWAYS LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des Inhalts[466583] Mime Type[application/x-unknown-content-type]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Referer[http://localhost/]
Connection[keep-alive]
Cache-Control[max-age=0]
POST-Daten:
POST_DATA[-----------------------------191201034430987
Content-Disposition: form-data; name="file"; filename="./[ARBITRARY FILE UPLOAD VULNERABILITY!]2.[ext]"
Content-Type: html

Status: 200[OK]
GET http://localhost/assets-library://asset/asset.php?id=250D47DB-57DD-47E4-B72A-CD4455B06277&ext=php
Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des Inhalts[0] Mime Type[application/x-unknown-content-type]
Request Header:
Host[localhost]
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[de,en-US;q=0.7,en;q=0.3]
Accept-Encoding[gzip, deflate]
Connection[keep-alive]
Response Header:
Accept-Ranges[bytes]
Content-Length[0]
Date[Sa., 12 Sep. 2015 11:23:51 GMT]


Security Risk:
==============
The security risk of the arbitrary file upload web vulnerability in the wifi interface upload post method request is estimated as high. (CVSS 8.6)


Credits & Authors:
==================
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com]


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed
or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable
in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab
or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for
consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any vendor licenses,
policies, deface websites, hack into databases or trade with fraud/stolen material.

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Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability Laboratory. Permission to
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Copyright © 2015 | Vulnerability Laboratory - [Evolution Security GmbH]™



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