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Title:
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======
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ePhoto Transfer v1.2.1 iOS - Multiple Web Vulnerabilities
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Date:
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=====
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2013-07-17
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References:
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===========
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http://www.vulnerability-lab.com/get_content.php?id=1017
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VL-ID:
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=====
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1017
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Common Vulnerability Scoring System:
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====================================
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6.6
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Introduction:
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=============
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ePhoto Transfer lets you quickly transfer photos and videos between your iPhone, iPad, iPod Touch, Mac, PC, and
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even other non-iOS mobile devices via Wi-Fi. It turns your iPhone/iPad/iPod Touch into a USB drive from your PC
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or Mac, then all your photos and videos will be available for drag and drop. You don`t need to install any desktop
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software(even iTunes), so you can use it at home or in office. It also provides useful features to help you organize
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your photos. You can rename photos and videos, sort and search within your camera roll. You can choose which photos
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and videos to share, and set accessing password for the shared files. Transferring photos and videos over Personal
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Hotspot Wi-Fi is fully supported. It`s a universal app, download once, both your iPhone and iPad will have it.
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(Copy of the Vendor Homepage: https://itunes.apple.com/de/app/ephoto-transfer/id643118163 )
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Abstract:
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=========
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The Vulnerability Laboratory Research Team discovered multiple vulnerabilities in the ePhoto Transfer v1.2.1 application (Apple iOS - iPad & iPhone).
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Report-Timeline:
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================
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2013-07-17: Public Disclosure (Vulnerability Laboratory)
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Status:
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========
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Published
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Affected Products:
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==================
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Apple AppStore
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Product: ePhoto Transfer 1.2.1
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Exploitation-Technique:
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=======================
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Remote
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Severity:
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=========
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High
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Details:
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========
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1.1
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A local command/path injection web vulnerability is detected in the ePhoto Transfer v1.2.1 application (Apple iOS - iPad & iPhone).
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The vulnerability allows local attackers to inject commands or path request on application -side of the vulnerable module.
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The vulnerability is located in the Index File Dir Listing module when processing to display manipulated Photo Picture Folder Names.
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Local attackers with physical device access can inject script code to the regular iOs photo application by renameing the visible folders.
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The attacker can save the changed foldername and to execute when accessing the index file dir listing module.
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Exploitation of the command injection web vulnerability does not require a privilege application user account or user interaction.
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Successful exploitation results in application-side command/path injection to unauthorized access files or to compromise the application
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or mobile device.
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Vulnerable Module(s):
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[+] File Dir Index
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Vulnerable Parameter(s):
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[+] Photo Album Name > FolderName
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1.2
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A remote denial of servicce vulnerability is detected in the ePhoto Transfer v1.2.1 application (Apple iOS - iPad & iPhone).
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The denial of service vulnerability allows a remote attacker to crash, slow down, block or shutdown the mobile application core.
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The vulnerability is located in the upload parameter when processing to request negative large integer values as filename.
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The attacker can open the url deletes the name of an exisiting file and includes a large negative integer value. As reaction
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because of the unfiltered input the application crashs.
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Exploitation of the denial of service vulnerability does not require a privilege application user account or user interaction.
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Successful exploitation of the vulnerability result in a stable application crash or shutdown.
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Vulnerable Module(s):
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[+] Upload Files
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Vulnerable Parameter(s):
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[+] upload
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1.3
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A client side cross site scripting vulnerability is detected in the ePhoto Transfer v1.2.1 application (Apple iOS - iPad & iPhone).
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The input validation vulnerability allows remote attackers to manipulate browser requests by client side script code injects in the web application.
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The vulnerability is located in the file download module when processing to request a manipulated download parameter via GET method.
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The script code will be executed when the service is redirecting user to the file dir menu listing.
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Exploitation of the vulnerability does not require a privilege application user account but low or medium user interaction.
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Successful exploitation of the vulnerability results in session hijacking, persistent phishing, persistent malicious external redirect
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and persistent module context manipulation.
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Vulnerable Module(s):
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[+] Files Download
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Vulnerable Parameter(s):
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[+] download
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Proof of Concept:
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=================
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1.1 - Local Command/Path Injection Vulnerability
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The local command/path inject web vulnerability can be exploited by remote attackers with physical device access and without user interaction.
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For demonstration or reproduce ...
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PoC: Index Listing - Foldername
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<tbody xmlns="http://www.w3.org/1999/xhtml"><tr><td class="icon"><a href="..">
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<img src="/static/backToParent_icon.png"/></a></td><td class="name"><a href="..">Parent Directory</a></td>
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<td class="modifieddate"/><td class="size"/><td/></tr><tr><td class="icon"><a><img src="/static/GenericFolderIcon.png"/></a></td>
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<td class="name"><a href="/Photos/Misc Backgrounds">Misc Backgrounds</a></td><td class="modifieddate">2013-07-16 19:05</td>
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<td class="size">--</td><td class="download"/></tr><tr><td class="icon"><a><img src="/static/GenericFolderIcon.png"/></a></td>
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<td class="name">
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<a href="/Photos/Sky Lounge>"<>"%20> "<iframe src=a>">Sky Lounge>"<>"%20> "<iframe src=a></a></td>
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<td class="modifieddate">2013-07-16 19:05</td><td class="size">
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--</td><td class="download"></td></tr><tr><td class="icon"><a><img src="/static/GenericFolderIcon.png"/></a></td><td class="name"><a
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href="/Photos/Aufnahmen">Aufnahmen</a></td><td class="modifieddate">2013-07-16 19:05</td><td class="size">--
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</td><td class="download"/></tr></tbody>
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Note: The foldername can be changed in the Photo App of iOS. The execution of the command or path request will be in the main index file dir listing.
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1.2 - Denial of Service
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The remote denial of service vulnerability can be exploited by remote attackers without privilege application user account and also
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without user interaction. For demonstration or reproduce ...
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http://localhost:8080/Photos/Misc%20Backgrounds?upload=-99999999
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Note: After opening the upload parameter with negative large integer value the service will crash because of a memory corruption.
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1.3 - Client Side Cross Site Scripting
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The client site cross site scripting web vulnerability can be exploited by remote attackers without application user account and low or
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medium user interaction. For demonstration or reproduce ...
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PoC:
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http://localhost:8080/PermissionNotes(PleaseRead).pdf?download=1&download=2+<iframe src=http://www.vuln-lab.com>
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Note: To execute the client side script code an existing file is required to request the download parameter.
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The pdf file mentioned in the poc is a default file and ever available after the installation of the iOS app.
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Solution:
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=========
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1.1
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The first vulnerability can be patched by a secure encoding of the picture and photo folder names.
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1.2
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The denial of service can be patched by a secure restriction and encode of the upload parameter.
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1.3
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The client side cross site scripting web vulnerability can be fixed by encoding of the download parameter when processing to list files.
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Risk:
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=====
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1.1
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The security risk of the command injection web vulnerability is estimated as high(-).
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1.2
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The security risk of the remote denial of service web vulnerability is estimated as medium.
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1.3
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The security risk of the client side cross site scripting vulnerability is estimated as low(+)|(-)medium.
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Credits:
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========
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Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm@evolution-sec.com)
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Disclaimer:
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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> 2013 | 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 |