mailing list archives
FTP Drive + HTTP 1.0.4 iOS - Code Execution Vulnerability
From: Vulnerability Lab <research () vulnerability-lab com>
Date: Thu, 27 Mar 2014 12:22:59 +0100
FTP Drive + HTTP 1.0.4 iOS - Code Execution Vulnerability
Vulnerability Laboratory ID (VL-ID):
Common Vulnerability Scoring System:
Product & Service Introduction:
FTP Drive + HTTP Server is the ultimate app as for usefullness and ease of use to bring with you and share all your
important files through your iPhone/iPod! When you`re in a hurry or simply wants the things done as they are supposed
to be done, you can use FTP Drive + HTTP Server. As the name implies, you can use this app mainly as an FTP Server,
so you can mount it as a Network Drive in your favorite operative system or you can browse the files through a web
browser like Firefox, Safari, Chrome, Internet Explorer, ...
(Copy of the Homepage: https://itunes.apple.com/us/app/ftp-drive-+-http-server-easiest/id455671784 )
(Vendor Homepage: http://www.gummybearstudios.com/ios.html )
Abstract Advisory Information:
The Vulnerability Laboratory discovered a code execution web vulnerability in the official Gummy Bear Studios FTP Drive
+ HTTP Server v1.0.4 iOS mobile web-application.
Vulnerability Disclosure Timeline:
2014-03-20: Public Disclosure (Vulnerability Laboratory)
Technical Details & Description:
A code execution web vulnerability has been discovered in the official Gummy Bear Studios FTP Drive + HTTP Server
v1.0.4 iOS mobile web-application.
The remote vulnerbaility allows an attacker to compromise the application and connected device components by usage of a
system specific command execution.
The vulnerability is located in the create folder input field. The input field direct executes the input via GET method
request. The request has only a simple
quotes encoding. Remote attackers are easily able to execute code by usage of a script code payload in combination with
system device specific php code values.
The execution of the code occurs in the main index file dir listing service context. The attack vector is on
application-side and the request method to attack
the service is GET. To bypass the path values validation it is required to first add a folder via `newDir` value. The
remote attacker is able to tamper the
create new folder post method request and can intercept the values twice to attach the second manipulated path value to
provoke a code execution. After the
add it is possible to attach to the already included values via create new folder to execute the code. The security
risk of the remote code execution web
vulnerability is estimated as critical with a cvss (common vulnerability scoring system) count of 9.0(+)|(-)9.1.
Exploitation of the remote code execution web vulnerability requires no privileged application user account (passwd
default blank) or user interaction.
Successful exploitation of the code execution vulnerability results in mobile application compromise and connected or
affected component compromise.
[+] Create New Folder
[+] path value
Proof of Concept (PoC):
The php code execution web vulnerability can be exploited by remote attackers without user interaction or privileged
web-application user account.
For security demonstration or to reproduce the vulnerability follow the provided steps and information below to
http://localhost:8080/[CONNECTED PATH<]/?newDir=%22[<CODE EXECUTION VULNERABILITY!]#TEST
--- PoC Session Logs [GET] ---
GET http://localhost:8080/[CONNECTED PATH<]/?newDir=%22[<CODE EXECUTION VULNERABILITY!]#TEST Load
Flags[LOAD_DOCUMENT_URI LOAD_INITIAL_DOCUMENT_URI ] Größe des Inhalts Mime
User-Agent[Mozilla/5.0 (Windows NT 6.3; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0]
Referer[http://localhost:8080/[CONNECTED PATH<]/?newDir=%22[<CODE EXECUTION VULNERABILITY!]#TEST]
Date[Mi., 19 Mär. 2014 15:06:04 GMT]
Solution - Fix & Patch:
The code execution web vulnerability can be patched by a secure parse of the create new folder input field.
Adjust the encoding of the affected foldername output context value in the main index file dir list.
The security risk of the remote code execution web vulnerability in the create new folder module is estimated as
Credits & Authors:
Vulnerability Laboratory [Research Team] - Benjamin Kunz Mejri (bkm () evolution-sec com) [www.vulnerability-lab.com]
Disclaimer & Information:
The information provided in this advisory is provided as it is without any warranty. Vulnerability Lab disclaims all
either expressed or implied, including the warranties of merchantability and capability for a particular purpose.
Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss
profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such
states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing
may not apply. We do not approve or encourage anybody to break any vendor licenses, policies, deface websites, hack
or trade with fraud/stolen material.
Domains: www.vulnerability-lab.com - www.vuln-lab.com - www.evolution-sec.com
Contact: admin () vulnerability-lab com - research () vulnerability-lab com - admin () evolution-sec
Section: www.vulnerability-lab.com/dev - forum.vulnerability-db.com -
Social: twitter.com/#!/vuln_lab - facebook.com/VulnerabilityLab -
Feeds: vulnerability-lab.com/rss/rss.php - vulnerability-lab.com/rss/rss_upcoming.php -
Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability
Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the
use of other
media, are reserved by Vulnerability-Lab Research Team or its suppliers. All pictures, texts, advisories, source code,
other information on this website is trademark of vulnerability-lab team & the specific authors or managers. To record,
modify, use or edit our material contact (admin () vulnerability-lab com or research () vulnerability-lab com) to get a
Copyright © 2014 | Vulnerability Laboratory [Evolution Security]
VULNERABILITY LABORATORY RESEARCH TEAM
CONTACT: research () vulnerability-lab com
- FTP Drive + HTTP 1.0.4 iOS - Code Execution Vulnerability Vulnerability Lab (Mar 28)