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UDID v1.0 iOS - Persistent Mail Encode Vulnerability



Document Title:
===============
UDID v1.0 iOS -  Persistent Mail Encode Vulnerability


References (Source):
====================
http://www.vulnerability-lab.com/get_content.php?id=1590


Release Date:
=============
2015-09-22


Vulnerability Laboratory ID (VL-ID):
====================================
1590


Common Vulnerability Scoring System:
====================================
3.6


Product & Service Introduction:
===============================
Here is the easiest way to get your device information such as UDID, Device Name, OS Version and many more, 
in just one click. You can also share your device information with any one.

(Copy of the Vendor Homepage: https://itunes.apple.com/de/app/my-device-udid/id504520659 )


Abstract Advisory Information:
==============================
The Vulnerability Laboratory Research Team discovered application-side validation vulnerability in the official UDID v1.0 iOS mobile web-application.


Vulnerability Disclosure Timeline:
==================================
2015-09-22:	Public Disclosure (Vulnerability Laboratory)


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


Affected Product(s):
====================
Hiteshi Technologies
Product: UDID+ - iOS Mobile Web Application 1.0


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


Severity Level:
===============
Medium


Technical Details & Description:
================================
An application-side input validation web vulnerability has been discovered in the official UDID v1.0 iOS mobile web-application.
The security web vulnerability allows to inject malicious script codes to the application-side of the vulnerable iOS mobile app.

The vulnerability is located in the `Send UDID via Email` encoding. The application encodes the input of the device cell name with 
wrong conditions. Thus results in an application-side script code execution issue in the Send UDID via Email module. The attackers 
changes by restricted physical device access the device cell name to compromise the application output in the Send UDID via Email module.

The security risk of the application-side input web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.6. 
Exploitation of the persistent web vulnerability requires a low privilege ios device account with restricted access and no user interaction. 
Successful exploitation of the vulnerabilities results in persistent phishing mails, session hijacking, persistent external redirect to malicious 
sources and application-side manipulation of affected or connected module context.

Vulnerable Module(s)
				[+] Send UDID via Email
 
Vulnerable Parameter(s)
				[+] device cell name (cid)

Affected Module(s)
				[+] UDID Device Information (Mail)


Proof of Concept (PoC):
=======================
The application-side mail encoding web vulnerability can be exploited by local attackers with restricted physical device access without user interaction.
For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.

Manual steps to reproduce the vulnerability ...
1. Change the cid of the ios device via settings to a script code payload (test)
2. Open the vulnerable application
3. Click the Send UDID via Email button
4. Push the email button
5. The function includes the device values with wrong encoding to the email
6. Successful reproduce of the vulnerability!


PoC: UDID.html
<div><u><b>DEVICE INFORMATION</b></u><br><br><b>UDID:</b> FFFFFFFFE9BBB73F956742C78479FE9A6F3F1DF1
<br><b>Device Name:</b> bkm337>"<img src"x"="" src="cid:">%20<iframe src="a">%20<iframe><br /><b>
System Name:</b> iPhone OS<br /><b>System Version:</b> 8.3<br /><b>
Platform:</b> iPad 2<br /><b>Model:</b> iPad<br /><b>
Language:</b> de<br /><b>Battery State:</b> 
UnPlugged<br /><b>Local IP:</b> 192.168.2.104<br /><b>
Battery Level:</b> 65 %<br /><br />This email was sent using UDID<br /></iframe>
</div>


Security Risk:
==============
The security risk of the persistent validation web vulnerability in the udid device information app is estimated as medium. (CVSS 3.6)


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


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