Title: ====== Bluetooth Chat Connect v1.0 iOS - Multiple Vulnerabilities
Date: ===== 2013-05-31 References: =========== http://www.vulnerability-lab.com/get_content.php?id=960 VL-ID: ===== 960 Common Vulnerability Scoring System: ==================================== 3.9 Introduction: ============= Bluetooth application has small but pleasant features that promise to facilitate your life a little and add charm to it. Firstly, it allows user to turn on Bluetooth easily and quickly with just one tap without entering device settings. And that means that you can manage your Bluetooth distantly i.e. more conveniently and quickly. Secondly, the application allows managing your private on-line chat between two devices where you can chat with your talker freely and with no limits locating pretty far away from him/her. You don’t need to stop an interesting talk to your friend, business partner or beloved person during lectures, business meetings or at somebody’s presence. Bluetooth will let you have a talk quietly and without being noticed, to discuss what’s going on, to exchange your ideas and to send prompts and correct answers to each other. Bluetooth chat let you exchange quick messages with a friend of yours conveniently, amazingly and for free. Easy and compact interface allows you typing and sending your messages without any difficulties and connection problems. Bluetooth will make you and your talker feel private in everyone’s hearing allowing to talk to each other silently and without being noticed staying in a public place. Feel double happy – enjoy free and virtual talk and artfully turn on and off your Bluetooth for a pretty short period of time. (Copy of the Homepage: https://itunes.apple.com/app/bluetooth-chat/id608328404 ) Abstract: ========= The Vulnerability Laboratory Research Team discovered multiple vulnerabilities in the in the Bluetooth Connect Chat v1.0 iOS Application (Apple - iPad & iPhone). Report-Timeline: ================ 2013-05-31: Public Disclosure Status: ======== Published Affected Products: ================== Apple AppStore Product: Bluetooth Chat Connect 1.0 Exploitation-Technique: ======================= Remote Severity: ========= Medium Details: ======== 1.1 A persistent input validation web vulnerability is detected in the in the Bluetooth Connect Chat v1.0 iOS Application (Apple - iPad & iPhone). The vulnerability typus allows remote attackers to inject own malicious persistent (application-side) script codes to compromise the iOS application. The persistent input validation web vulnerability is located in the message board listing when processing to display manipulated messages. Attacker can inject own malicious script code to execute the context persistent from the message listing. To inject the code the remote attacker needs to bypass the basic validation of the client which is possible with a standard obfuscated char to char injection. Exploitation of the persistent web vulnerability requires low user interaction and a free but low privilege application user account. Successful exploitation of the persistent input validation web vulnerability results in persistent session hijacking, persistent web phishing, persistent external redirects or persistent module context manipulation. Vulnerable Module(s): [+] Message Board - Chat Vulnerable Parameter(s): [+] message (context) Affected Module(s): [+] Message Board Listing 1.2 A denial of service vulnerability is detected in the Bluetooth Connect Chat v1.0 iOS Application for Apples iPad & iPhone. The vulnerability typus allows remote attackers to freeze, block or stable crash down the application or software. The remote DoS vulnerability is located in the chat name and chat message encoding when processing to load a message special crafted message. The remote attacker uses any random html or quote tag as chat name. After including the tag as name the attacker connects to an existing chatroom via bluetooth or w-lab. Now he writes the name (used to logon for chatting) as message. The result is a stable iOS app crash (shutdown) on both sides because of a collision in the message client when processing to load both strings with an unknown exception. Exploitation of the remote vulnerability requires no user interaction and a free but low privilege application user account. Successful exploitation of the remote denial of service bug results in stable application crash and unauthorized shutdowns. Vulnerable Module(s): [+] Message Board - Chat Vulnerable Module(s): [+] Chatname [+] Message Context Solution: ========= 1.1 The persistent issue can be addressed by a restriction to the chat-name input fields. Parse the chat name input fields itself and encode the chat user name with a secure filter mask. Escape, filter or encode the message listing to prevent the execution of persistent script codes. 1.2 The denial of service issue can be patched by a secure parse of the collision when processing to handle the same string 2 times as message. Risk: ===== 1.1 The security risk of the persistent input validation web vulnerability in the client is estimated as medium(+). 1.2 The security risk of the remote denial of service vulnerability in the client is estimated as medium(-). Credits: ======== Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (b...@vulnerability-lab.com) [www.vulnerability-lab.com] Disclaimer: =========== 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. 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