Document Title: =============== AdHocMate v1.0 iOS - Persistent Mail Encode Vulnerability References (Source): ==================== http://www.vulnerability-lab.com/get_content.php?id=1559 Release Date: ============= 2015-07-27 Vulnerability Laboratory ID (VL-ID): ==================================== 1559 Common Vulnerability Scoring System: ==================================== 3.8 Product & Service Introduction: =============================== AdHocMate is a simple app to displays the Unique Device Identifier (UDID) and some other information of your iOS devices. You can send this information to developers so they can add your proper device ID to their Ad Hoc distribution for app tester. (Copy of the Vendor Homepage: https://itunes.apple.com/us/app/adhocmate/id647553418 ) Abstract Advisory Information: ============================== The Vulnerability Laboratory Core Research Team discovered an application-side input validation vulnerability in the AdHocMate v1.0 iOS mobile application. Vulnerability Disclosure Timeline: ================================== 2015-07-27: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Affected Product(s): ==================== Softmastx Product: AdHocMate - iOS Mobile (Web-Application) 1.0 Exploitation Technique: ======================= Local Severity Level: =============== Low Technical Details & Description: ================================ An application-side input validation web vulnerability has been discovered in the official AdHocMate v1.0 iOS mobile web-application. The security web vulnerability allows to inject malicious script codes on the application-side of the vulnerable iOS mobile app. The vulnerability is located in the `Share Options > 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 share options > mail module. The attackers changes by restricted physical device access the device cell name to compromise the application output in the share options > mail module. The security risk of the application-side input web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.8. 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) [+] Share Options > Email Vulnerable Parameter(s) [+] device cell name (cid) Affected Module(s) [+] AdHoc 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 Share Options 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: AdHoc Device Informations.html <div><b>UDID :</b> A14D1645-7C89-4040-8EDD-6A4F90399C57<br> <b>Device Name : </b>bkm337>"<img src"x"="" src="cid:">%20<[PERSISTENT INJECTED SCRIPT CODE!]iframe src="a">%20<iframe> <br> <b> Model : </b>iPad3,4 <br><b> iOS Version :</b> iPhone OS 8.3 <br><b>Memory : </b>987 MB <br><b>Free Disk Space : </b> 799 MB</iframe></div> Solution - Fix & Patch: ======================= The vulnerability can be patched by a secure parse and encode of the email body message context in the share options > email module. Restrict the input and disallow special chars. Prevent an execution point by implementation of a secure exception-handling. Security Risk: ============== The security risk of the application-side validation vulnerability in the share options module is estimated as medium. (CVSS 3.8) 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. 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