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UDID v1.0 iOS - Persistent Mail Encode Vulnerability

2015-09-22 19:00
Document Title:
UDID v1.0 iOS - Persistent Mail Encode Vulnerability

References (Source):

Release Date:

Vulnerability Laboratory ID (VL-ID):

Common Vulnerability Scoring System:

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:

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

Exploitation Technique:

Severity Level:

Technical Details & Description:
An application-side input validation web vulnerability has been discovered in the official UDID v1.0 iOS mobile
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

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><br /><b>
Battery Level:</b> 65 %<br /><br />This email was sent using UDID<br /></iframe>

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 () 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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