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Document Title:
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===============
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Photos in Wifi v1.0.1 iOS - Arbitrary File Upload Vulnerability
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References (Source):
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====================
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http://www.vulnerability-lab.com/get_content.php?id=1600
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Release Date:
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=============
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2015-09-28
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Vulnerability Laboratory ID (VL-ID):
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====================================
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1600
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Common Vulnerability Scoring System:
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====================================
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8.6
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Product & Service Introduction:
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===============================
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Share the photos and videos of your iPhone/iPad in wifi. Upload photos and videos right to your camera roll without iTunes.
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With Photos In Wifi, you can share your whole camera roll, and album, or a selection of photos and videos. Once the app
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server is started, you can view, play and download the shared photos and videos from any computer or smartphone web browser.
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You can also upload a photo, a video, or a zip file containing 100`s of photos and videos, right into your iPhone/iPad
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camera roll. You can also use Photos In Wifi to send multiples full resolution photos and videos in a single email or MMS.
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(Copy of the Homepage: https://itunes.apple.com/us/app/photos-in-wifi-share-photos/id966316576 )
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Abstract Advisory Information:
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==============================
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The Vulnerability Laboratory Core Research Team discovered an arbitrary file upload web vulnerability in the Photos in Wifi v1.0.1 iOS mobile web-application.
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Vulnerability Disclosure Timeline:
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==================================
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2015-09-28: Public Disclosure (Vulnerability Laboratory)
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Discovery Status:
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=================
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Published
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Affected Product(s):
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====================
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Sebastien BUET
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Product: Photos In Wifi - iOS Mobile (Web-Application) 1.0.1
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Exploitation Technique:
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=======================
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Remote
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Severity Level:
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===============
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High
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Technical Details & Description:
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================================
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An arbitrary file upload web vulnerability has been discovered in the official Photos in Wifi v1.0.1 iOS mobile web-application.
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The vulnerability allows remote attackers to upload an arbitrary (malicious) file to compromise the iOS wifi web-application.
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The arbitrary file upload vulnerability is located in `Select a photo or a video to upload` module. Remote attackers are able to intercept
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the vulnerable `filename` value in the `upload > submit` POST method request to compromise the mobile device or interface app. The attacker
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can use a live session tamper for http to change the `filename` value to a webshell. After the upload the attacker requests the
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`asset.php` file to execute the stored malicious file. The encoding of the `ext` value and the parse of the `filename` value is broken
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which results obviously in this type behavior. The injection point of the issue is the upload POST method request with the vulnerable
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filename value. The execution point occurs in the `assets.php` file when processing to display the images or videos. The upload file path
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execution is not restricted (flag) and helps an attacker in case of exploitation to easily upload or access webshells.
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Exploitation of the remote web vulnerability requires no user interaction and also no privileged web application user account.
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Successful exploitation of the arbitrary file upload vulnerability results in web-server, web module, website or dbms compromise.
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Vulnerable Module(s):
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[+] ./assets-library://asset/
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Vulnerable File(s):
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[+] asset.php
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Proof of Concept (PoC):
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=======================
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The arbitrary file upload vulnerability can be exploited by remote attackers without privilege web-application user account or user interaction.
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For security demonstration or to reproduce the vulnerability follow the provided information and steps below to continue.
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Manual steps to reproduce the vulnerability ...
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1. Start the web-server (wifi)
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2. Go to another computer and login by requesting via http localhost
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3. Click upload and choose a random file
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4. Start a live session tamper for http
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5. Submit the upload to continue with the POST method request
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6. Inject to the filename value a webshell code
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7. Continue to reply the request
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8. The server responds with 200OK
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9. Open the poc url of the path to execute the webshell to compromise the mobile device or mobile app
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10. Successful reproduce of the arbitrary file upload vulnerability!
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PoC: URL
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http://localhost/assets-library://asset/asset.php?id=40C9C332-857B-4CB8-B848-59A30AA9CF3B&ext=php
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--- PoC Session Logs [POST] ---
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Status: 200[OK]
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POST http://localhost/
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Load Flags[VALIDATE_ALWAYS LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des Inhalts[466583] Mime Type[application/x-unknown-content-type]
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Request Header:
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Host[localhost]
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User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0]
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Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
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Accept-Language[de,en-US;q=0.7,en;q=0.3]
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Accept-Encoding[gzip, deflate]
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Referer[http://localhost/]
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Connection[keep-alive]
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Cache-Control[max-age=0]
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POST-Daten:
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POST_DATA[-----------------------------191201034430987
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Content-Disposition: form-data; name="file"; filename="./[ARBITRARY FILE UPLOAD VULNERABILITY!]2.[ext]"
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Content-Type: html
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Status: 200[OK]
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GET http://localhost/assets-library://asset/asset.php?id=250D47DB-57DD-47E4-B72A-CD4455B06277&ext=php
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Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des Inhalts[0] Mime Type[application/x-unknown-content-type]
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Request Header:
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Host[localhost]
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User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0]
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Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
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Accept-Language[de,en-US;q=0.7,en;q=0.3]
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Accept-Encoding[gzip, deflate]
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Connection[keep-alive]
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Response Header:
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Accept-Ranges[bytes]
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Content-Length[0]
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Date[Sa., 12 Sep. 2015 11:23:51 GMT]
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Security Risk:
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==============
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The security risk of the arbitrary file upload web vulnerability in the wifi interface upload post method request is estimated as high. (CVSS 8.6)
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Credits & Authors:
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==================
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Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com) [www.vulnerability-lab.com]
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Disclaimer & Information:
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=========================
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The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all warranties, either expressed
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or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers are not liable
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in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab
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or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for
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consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break any vendor licenses,
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policies, deface websites, hack into databases or trade with fraud/stolen material.
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Domains: www.vulnerability-lab.com - www.vuln-lab.com - www.evolution-sec.com
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Contact: admin@vulnerability-lab.com - research@vulnerability-lab.com - admin@evolution-sec.com
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Copyright © 2015 | Vulnerability Laboratory - [Evolution Security GmbH]™
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--
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VULNERABILITY LABORATORY - RESEARCH TEAM
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SERVICE: www.vulnerability-lab.com
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CONTACT: research@vulnerability-lab.com
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