Title: ====== Air Drive Plus v2.4 iOS - Arbitrary File Upload Vulnerability Date: ===== 2013-07-09 References: =========== http://www.vulnerability-lab.com/get_content.php?id=1000 VL-ID: ===== 1000 Common Vulnerability Scoring System: ==================================== 6.7 Introduction: ============= Turn your iPhone, iPod touch, and iPad into a wireless disk. Share your files and photos over network, no USB cable or extra software required. Features ... [Server] function Easily access your files from any web browser. Easily upload and download your photo from photo libraries via web browser. [My Files] function Preview/Move/Copy/Delete/Unzip/Rename/Email file and Create new directory on your iPhone, iPod touch & iPad. Image: png, jpg, gif Document: Word, PowerPoint, Excel, PDF Compressed: zip Text-base: txt, html, php, js, css Media: mp3, wav, mp4, mov Save Word, PowerPoint, Excel and PDF files from other apps to Air Drive, include Apple’s Email app and Safari. Open All types of file from Air Drive to other apps such as Dropbox. [Settings] function Add Password to prevent unauthorized access to your files. Customize the Server port and Real-time On/Off the sharing functions and takes effect immediately to restrict the access from web browser (Copy of the Homepage: https://itunes.apple.com/de/app/air-drive-plus-your-file-manager/id422806570 ) Abstract: ========= The Vulnerability Laboratory Research Team discovered a remote file include vulnerability in the Air Drive Plus 2.4 application (Apple iOS - iPad&iPhone). Report-Timeline: ================ 2013-07-09: Public Disclosure (Vulnerability Laboratory) Status: ======== Published Affected Products: ================== Apple AppStore Product: Air Drive Plus 2.4 Exploitation-Technique: ======================= Remote Severity: ========= High Details: ======== A local file include and arbitrary file upload web vulnerability is detected in the Air Drive Plus 2.4 application (Apple iOS - iPad&iPhone). The vulnerability allows remote attackers to upload files via POST method with multiple extensions to unauthorized access them on application-side of the service. The vulnerability is located in the file upload/add (AirDriveAction_file_add) module of the web-server (http://localhost:8000/) when processing to request a manipulated filename via POST. The injected file will be accessable via the index listing module of the application. Remote attackers can exchange the filename with a double or tripple extension bia POST method to bypass the upload validation and filter process. After the upload the attacker access the file with one extension and exchange it with the other one to execute for example php codes. A persistent script code injection is detected in the filename parameter. Attackers can tamper the request and exchange the file name with persistent malicious script code or tags. The code will be executed in the main index site when processing to list the object (file) items. Attackers are also able to inject persistent code with local frame requests to unauthorized access application data/apps or restricted application information. The execution of the persistent code also occurs when an application user is processing to delete the malicious context. The injected code is stored and will be executed from the delete notification and protection message. Exploitation of the vulnerability requires no user interaction and also without privilege application user account (no password standard). Successful exploitation of the vulnerability results in unauthorized path or file access via local file include or arbitrary file upload. Vulnerable Application(s): [+] Air Drive Plus 2.4 - ITunes or AppStore (Apple) Vulnerable Module(s): [+] File Upload (Web Server) [Remote] Vulnerable File(s): [+] AirDriveAction_file_add Vulnerable Parameter(s): [+] filename Affected Module(s): [+] Application Index Listing (http://localhost:8000/) Proof of Concept: ================= The arbitrary file upload vulnerability can be exploited by remote attackers without privileged application user account and also without user interaction. For demonstration or reproduce ... 1.1 <tr><td><img src="Air%20Drive%20-%20Files_files/file.png" height="20px" width="20px"></td><td><a target="_blank" href="http://192.168.2.104:8000/AirDriveAction_file_show/;/private/var/mobile/Applications";>;/private/var/mobile/Applications/</a></td> <td>27,27KB</td><td align="center">2013-07-08 23:07:52</td><td align="center"> <a onclick="javascript:delfile("/private/var/mobile/Applications");" class="transparent_button">Delete</a></td></tr> 1.2 <tr><td><img src="Air%20Drive%20-%20Files_files/file.png" height="20px" width="20px"></td><td><a target="_blank" href="http://192.168.2.104:8000/AirDriveAction_file_show/1337.png.gif.php.js.html";>1337.png.gif.php.js.html</a></td> <td>27,27KB</td><td align="center">2013-07-08 23:07:52</td><td align="center"><a onclick="javascript:delfile("1337.png.gif.php.js.html");" class="transparent_button">Delete</a></td></tr> 1.3 <tr><td><img src="Air%20Drive%20-%20Files_files/file.png" height="20px" width="20px"></td><td><a target="_blank" href="http://192.168.2.104:8000/AirDriveAction_file_show/[PERSISTENT INJECTED SCRIPT CODE!]1337.png">[PERSISTENT INJECTED SCRIPT CODE!]1337.png</a></td><td>27,27KB</td><td align="center"> 2013-07-08 23:07:52</td><td align="center"><a onclick="javascript:delfile("[PERSISTENT INJECTED SCRIPT CODE!]1337.png");" class="transparent_button">Delete</a></td></tr> --- Session Request Log --- Status: 302[Found] POST http://localhost:8000/AirDriveAction_file_add Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Content Size[83] Mime Type[text/html] Request Headers: Host[localhost:8000] User-Agent[Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20100101 Firefox/22.0] Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8] Accept-Language[en-US,en;q=0.5] Accept-Encoding[gzip, deflate] DNT[1] Referer[http://localhost:8000/index_files.html] Connection[keep-alive] Post Data: POST_DATA[-----------------------------228191371227676 Content-Disposition: form-data; name="uploadfile"; filename=";/private/var/mobile/Applications/1337.png" Reference(s): http://localhost:8000/AirDriveAction_file_add Risk: ===== The security risk of the arbitrary file upload vulnerability and the multiple extensions issue are estimated as high(+). Credits: ======== Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@xxxxxxxxxxxxxxxxx) 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. 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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