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Document Title:
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===============
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ePhone Disk v1.0.2 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=1230
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Release Date:
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=============
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2014-03-25
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Vulnerability Laboratory ID (VL-ID):
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====================================
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1230
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Common Vulnerability Scoring System:
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====================================
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6.9
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Product & Service Introduction:
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===============================
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ePhone Disk is lightweight file manager that lets you download, organize, transfer, offline read your files.
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It provides the most advanced WiFi sharing features in market.
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SHARE FILES VIA WIFI
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- Access iPhone like a USB drive from computer, simply use Drag and Drop to manage files
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- Discover nearby devices, and discoverable by others
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- Single tap to connect to nearby devices
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- Accessible from any WebDav client
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( Copy of the Homepage: https://itunes.apple.com/us/app/ephone-disk-download-share/id621895613 )
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Abstract Advisory Information:
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==============================
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The Vulnerability Laboratory Research Team discovered multiple vulnerabilities in the official Easiermobile Inc - ePhone Disk v1.0.2 iOS mobile web-application.
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Vulnerability Disclosure Timeline:
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==================================
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2014-03-25: 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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Easiermobile Inc
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Product: ePhone Disk iOS - Download, Share Files via WiFi 1.0.2
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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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1.1
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A local file include web vulnerability has been discovered in the official Easiermobile Inc - ePhone Disk v1.0.2 iOS mobile web-application.
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The local file include web vulnerability allows remote attackers to unauthorized include local file/path requests or system specific path
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commands to compromise the web-application or mobile device.
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The web vulnerability is located in the `filename` value of the `Upload file` module. Remote attackers are able to inject own files with malicious
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`filename` value in the upload POST method request to compromise the mobile web-application. The attack vector is persistent and the request
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method is POST. The local file/path include execution occcurs in the main file dir list. The security risk of the local file include web vulnerability
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is estimated as high(+) with a cvss (common vulnerability scoring system) count of 6.8(+)|(-)6.9.
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Exploitation of the local file include web vulnerability requires no user interaction but a privileged web-application user account with low user auth.
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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 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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[+] Upload File > Index File Dir List (http://localhost:8080)
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1.2
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A local command/path injection web vulnerabilities has been discovered in the official Easiermobile Inc - ePhone Disk v1.0.2 iOS mobile web-application.
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A command inject vulnerability allows attackers to inject local commands via vulnerable system values to compromise the apple mobile iOS application.
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The vulnerability is located in the vulnerable `foldername` value of the wifi file dir list module. Local attackers are able to inject own malicious
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system specific commands or path value requests in the vulnerable foldername value. The injection requires a active sync with the wifi app stored folders.
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The execution of the local command inject bug via foldername value on sync occurs in the file dir index list of the main upload path. The security risk of
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the local command/path inject vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 6.3(+)|(-)6.4.
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Exploitation of the command/path inject vulnerability requires a low privileged iOS device account with restricted access and no user interaction.
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Successful exploitation of the vulnerability results in unauthorized execution of system specific commands and unauthorized path value requests to
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compromise the mobile iOS application or the connected device components.
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Request Method(s):
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[+] Sync [POST]
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Vulnerable Parameter(s):
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[+] foldername (path value)
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Affected Module(s):
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[+] ./[iPhone]/Sub Category x - File Dir Listing
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1.3
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A remote denial of service web vulnerability has been discovered in the official Easiermobile Inc - ePhone Disk v1.0.2 iOS mobile web-application.
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A denial of service vulnerability allows remote attackers to block, freeze or crash the affected or vulnerable mobile online-service application.
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The vulnerability is located in the vulnerable `[download]` value of the downloads module. Local attackers are able to include tags as download
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path value via GET method request. The application responds with an unhandled exception and the result is a permanent online-service and
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application crash. The security risk of the remote denial of service web vulnerability is estimated as low(+) with a cvss (common vulnerability
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scoring system) count of 1.8(+)|(-)1.9.
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Exploitation of the denial of service web vulnerability requires no privileged iOS device account but low user interaction (allow|accept).
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Successful exploitation of the DoS vulnerability results in unauthorized execution of system specific commands and unauthorized path value
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requests to compromise the mobile iOS application or the connected device components.
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Request Method(s):
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[+] [GET]
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Vulnerable Parameter(s):
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[+] ?download
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Proof of Concept (PoC):
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=======================
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1.1
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The local file include web vulnerability can be exploited by local attackers with low user interaction and with low privileged web-interface account.
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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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PoC: Upload File > Name > [Index File Dir List]
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<table xmlns="http://www.w3.org/1999/xhtml"><thead><th class="icon"/><th class="name">Name</th><th class="modifieddate">Date Modified</th>
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<th class="size">Size</th><th/></thead><tbody><tr><td class="icon"><a href=".."><img src="/static/backToParent_icon.png"/></a></td>
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<td class="name"><a href="..">Parent Directory</a></td><td class="modifieddate"/><td class="size"/><td/></tr><tr><td class="icon">
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<a href="/iPhone/Downloads/./[LOCAL FILE INCLUDE VULNERABILITY!].png">
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<img src="/iPhone/Downloads/./[LOCAL FILE INCLUDE VULNERABILITY!].png?thumbnail=1"/></a></td>
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<td class="name"><a href="/iPhone/Downloads/./[LOCAL FILE INCLUDE VULNERABILITY!].png">./[LOCAL FILE INCLUDE VULNERABILITY!].png</a></td>
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<td class="modifieddate">2014-03-19 14:09</td><td class="size">538 bytes</td>
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<td class="download"><a href="/iPhone/Downloads/./[LOCAL FILE INCLUDE VULNERABILITY!].png?download=1">
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download</a></td></tr></tbody></table>
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--- PoC Sesion Logs [POST] ---
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Status: 200[OK]
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POST http://localhost:8080/iPhone/Downloads?upload=1 Load Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Gr<47><72>e des Inhalts[0] Mime Type[text/plain]
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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:27.0) Gecko/20100101 Firefox/27.0]
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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-de,de;q=0.8,en-us;q=0.5,en;q=0.3]
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Accept-Encoding[gzip, deflate]
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Referer[http://localhost:8080/iPhone/Downloads]
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Connection[keep-alive]
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POST-Daten:
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POST_DATA[-----------------------------57142047116429
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Content-Disposition: form-data; name="file"; filename="./[LOCAL FILE INCLUDE VULNERABILITY!].png"
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Content-Type: image/png
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1.2
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The command inject web vulnerability can be exploited by local attackers with low user interaction and low privileged web-application user account.
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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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PoC: Foldername > Name > [Index File Dir List]
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<table xmlns="http://www.w3.org/1999/xhtml"><thead><th class="icon"></th><th class="name">Name</th>
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<th class="modifieddate">Date Modified</th><th class="size">Size</th><th/></thead><tbody><tr><td class="icon">
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<a><img src="/static/GenericFolderIcon.png"/></a></td><td class="name"><a href="/iPhone/[LOCAL COMMAND INJECTION VULNERABILITY!]>
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[LOCAL COMMAND INJECTION VULNERABILITY!]">iPhone/[LOCAL COMMAND INJECTION VULNERABILITY!]</a></td><td class="modifieddate">2014-03-19 14:11</td>
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<td class="size">--
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</td><td class="download"/></tr></tbody></table>
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1.3
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The denial of service web vulnerability can be exploited by remote attackers with low user interaction (allow|accept).
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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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http://localhost:8080/iPhone/Downloads/[FileName].*?download=[REMOTE DENIAL OF SERVICE VULNERABILITY!]
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Note: After the accept of the device owner the application permanent crashes.
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A encode problem returns with an error which results in a crash via memory corruption.
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Solution - Fix & Patch:
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=======================
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1.1
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The first vulnerability can be patched by a secure parse of the filename value in the upload file module POST method request.
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Encode also the output file dir index list with the vulnerable filename output value to prevent injection of malicious context.
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1.2
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The first vulnerability can be patched by a secure parse of the folder name value in the app sync module POST method request.
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Encode also the output file dir index list with the vulnerable folder name output value to prevent injection of malicious context.
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1.3
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Restrict the download value to integer and allocate the memory. Implement an own little exception-handling to prevent remote denial of service attacks.
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Security Risk:
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==============
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1.1
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The security risk of the local file include vulnerability is estimated as critical.
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1.2
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The security risk of the local command inject vulnerability via phone foldername sync is estimated as high.
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1.3
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The security risk of the remote denial of service vulnerability is estimated as low(+).
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Credits & Authors:
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==================
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Vulnerability Laboratory [Research Team] - LariX4 (research@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,
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either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability-
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Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business
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profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some
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states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation
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may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack into databases
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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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modify, use or edit our material contact (admin@vulnerability-lab.com or research@vulnerability-lab.com) to get a permission.
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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 |