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Document Title:
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===============
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AllReader v1.0 iOS - Multiple Web Vulnerabilities
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References (Source):
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====================
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http://www.vulnerability-lab.com/get_content.php?id=1269
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Release Date:
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=============
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2014-05-26
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Vulnerability Laboratory ID (VL-ID):
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====================================
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1269
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Common Vulnerability Scoring System:
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====================================
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6.8
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Product & Service Introduction:
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===============================
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Professional helper on your iPhone, iPad, and iPod that will allow you to read virtually any file type right from your device: PDF, DJVU, DOC, XLS, PPT, TXT,
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Image, Video files, whether these are important documents, books, student materials, notes or you can just view pictures and video clips.
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Supported devices: iPhone 3Gs/4/4S/5, iPod Touch 4/5, all iPad generations.
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(Copy of the Homepage: https://itunes.apple.com/us/app/all-reader./id871830567 )
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Abstract Advisory Information:
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==============================
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The Vulnerability Laboratory Research Team discovered a local file include web vulnerability in the official AllReader v1.0 iOS mobile application by Wylsacom Waytt.
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Vulnerability Disclosure Timeline:
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==================================
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2014-05-26: 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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Wylsacom Waytt
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Product: AllReader - iOS Mobile Application 1.0
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Exploitation Technique:
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=======================
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Local
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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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A local file include web vulnerability has been discovered in the official AllReader v1.0 iOS mobile application by Wylsacom Waytt.
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The local file include web vulnerability allows remote attackers to unauthorized include local file/path requests or system specific
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path commands to compromise the mobile web-application.
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The web vulnerability is located in the `filename` value of the `file upload` module. Remote attackers are able to inject own files with
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malicious `filename` values in the `file upload` POST method request to compromise the mobile web-application. The local file/path
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execution occcurs in the index file/path dir list context. The attacker is able to inject the malicious file/path include request by usage
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of the available `wifi interface`.
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Remote attackers are also able to exploit the filename validation issue in combination with persistent injected script codes to execute
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different local malicious attacks requests. The attack vector is on the application-side of the allreader wifi service and the request
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method to inject is POST.
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The security risk of the local file include web vulnerability is estimated as high with a cvss (common vulnerability scoring system) count
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of 6.8. Exploitation of the local file include web vulnerability requires no privileged web-application user account withoutuser interaction.
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Successful exploitation of the local file include web vulnerability results in mobile application or connected device component compromise.
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Request Method(s):
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[+] [POST]
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Vulnerable Service(s):
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[+] WiFi Transfer UI
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Vulnerable Module(s):
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[+] Upload File
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Vulnerable Parameter(s):
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[+] filename
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Affected Module(s):
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[+] Index File/Folder Dir Listing (http://localhost:8080/)
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Proof of Concept (PoC):
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=======================
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The local file/path include web vulnerability in the web-server can be exploited by local attackers without auth or user interaction.
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For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.
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Manual steps to reproduce the security vulnerability ...
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1. Install the ios application (iphone or ipad)
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2. Start it and move to the settings menu, activate the wifi server
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3. Go to another computer in the same network and surf to the local web-server url (localhost:8080)
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4. Upload a random image
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5. Tamper the session information by an intercept, exchange the vulnerable `filename` value with own malicious file or path request
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Note: Payloads can be combined with script code to successful execute different other attacks like hijacking, phishing and co.
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5. Submit the settings and refresh the file dir index list
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6. The code execution occurs in the file dir index list of ios app
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7. Successful reproduce of the local fil/path include web vulnerability
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PoC: File Dir Index List - http://localhost:8080/
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<html><head><title>Files from </title><meta http-equiv="Content-Type" content="text/html;
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charset=UTF-8"><style>html {background-color:#eeeeee} body { background-color:#FFFFFF; font-family:Tahoma,Arial,Helvetica,sans-serif;
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font-size:18x; margin-left:15%; margin-right:15%; border:3px groove #006600; padding:15px; } </style></head><body><h1>Files from </h1>
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<bq>The following files are hosted live from the iPhone's Docs folder.</bq><p><a href="..">..</a><br>
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<a href="../.[LOCAL FILE/PATH INCLUDE WEB VULNERABILITY].png"><../.[LOCAL FILE/PATH INCLUDE WEB VULNERABILITY!].png</a> (0.5 Kb, 2014-05-26 11:49:04 +0000)<br />
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</p><form action="" method="post" enctype="multipart/form-data" name="form1" id="form1"><label>upload file<input type="file" name="file" id="file" /></label>
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<label><input type="submit" name="button" id="button" value="Submit" /></label></form></body></html></iframe></a></p></body></html>
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--- POC SESSION LOGS [POST] ---
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Status: 200[OK]
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POST http://localhost:8080/ Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Gr<47><72>e des Inhalts[821] Mime Type[application/x-unknown-content-type]
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Request Header:
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Host[localhost:8080]
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User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0]
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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:8080/]
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Connection[keep-alive]
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POST-Daten:
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POST_DATA[-----------------------------102203247921326
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Content-Disposition: form-data; name="file"; filename="../.[LOCAL FILE/PATH INCLUDE WEB VULNERABILITY!].png"
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Content-Type: image/png
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-- RESPONSE HEADER
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Status: 200[OK]
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GET http://localhost:8080/../.[LOCAL FILE/PATH INCLUDE WEB VULNERABILITY!] Load Flags[LOAD_DOCUMENT_URI ] Gr<47><72>e des Inhalts[721] Mime Type[application/x-unknown-content-type]
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Request Header:
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Host[localhost:8080]
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User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:29.0) Gecko/20100101 Firefox/29.0]
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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:8080/]
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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[721]
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Date[Mo., 26 Mai 2014 11:49:06 GMT]
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Reference(s):
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http://localhost:8080/
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http://localhost:8080/../x
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Solution - Fix & Patch:
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=======================
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The vulnerability can be patched by a secure parse and encode of the vulnerale filename value in the upload module POST method request.
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The file dir index list needs to encode malicious filenames even of the input is already parsed to prevent further attacks via file/path value.
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Restrict, filter or use a secure exception-handling to disallow special chars, html tags or script codes.
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Security Risk:
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==============
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The security risk of the local file/path include web vulnerability is estimated as high(-).
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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
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expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-Lab or its suppliers
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are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even
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if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation
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of liability for consequential or incidental damages so the foregoing limitation may not apply. We do not approve or encourage anybody to break
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any vendor licenses, 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 <20> 2014 | Vulnerability Laboratory [Evolution Security]
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--
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VULNERABILITY LABORATORY RESEARCH TEAM
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DOMAIN: www.vulnerability-lab.com
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CONTACT: research@vulnerability-lab.com |