Exploit the possiblities

File Explorer (FX) For Android Path Traversal

File Explorer (FX) For Android Path Traversal
Posted Feb 6, 2014
Authored by Keith Makan

File Explorer (FX) for Android suffers from a path traversal vulnerability. version 2.3.0.10 is affected.

tags | exploit, file inclusion
MD5 | 880dcee5a08c192a5e71249446ebf447

File Explorer (FX) For Android Path Traversal

Change Mirror Download
*# Disclosure Date:* 31 Jan 2014
*# Author: *Keith Makan (http://blog.k3170makan.com)
*# Vendor or Software Link:*
https://play.google.com/store/apps/details?id=nextapp.fx&hl=en

*# Version:* 2.3.0.10
*# Tested on:* Android 3.2.1
*# Site : http://blog.k3170makan.com <http://blog.k3170makan.com>*
Description: File Explorer (FX) for Android Suffers from a Path Traversal
and android.permission.storage permission leakage vulnerability.

The nextapp.fx.FileProvider Content Provider URI does not require any
Read/Write permissions yet allows unauthorized applications to make use of
the android.permission.STORAGE permission by providing them with access to
the local filesystem.
Impact: Malicious Android applications with no Permissions are capable of
leaking the contents of a victims local file system.

An estimated 500,000 - 1,000,000 installs are currently affected.
Fix:
Enforce android.permission.STORAGE Read/Write permission for the affected
content provider.

PoC available at:
>
http://blog.k3170makan.com/2014/02/path-traversal-vulnerability-in-file.html#more

*Timeline:*
31 Jan 2014 - Original Disclosure
06 February 2014 - Advisory Publication
--
<Keith k3170makan <http://about.me/k3170makan> Makan/>


-------------
Proof of concept:

dz> run app.provider.read content://nextapp.fx.FileProvider/
Is a directory
dz> run app.provider.read content://nextapp.fx.FileProvider/../../../system/etc/hosts
127.0.0.1 localhost


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